Goldstone Radar Observations Planning: (7335) 1989 JA, 388945 2008 TZ3, and 467460 2006 JF42

Background 


7335 1989 JA
1989 JA was discovered by E. F. Helin at Palomar on May 1, 1989.  This was the 55th near-Earth
asteroid known and the first discovered a month prior to its closest approach.

Observations by NASA's WISE spacecraft in 2010 yielded a diameter of 0.9 km (Mainzer et al. 2011).
Radar observations in 1989 (Mahapatra et al. 2002) give a radar cross section of 0.07 km^2.  
If we adopt that value and the diameter reported by Mainzer et al., then this implies a 
radar albedo of about 0.1.

The circular polarization ratios obtained at Goldstone and Arecibo in 1989 average 0.17.
Given previous correlations with different spectral classes, this probably rules out 
the E- and V-taxonomies.

Mahapatra et al. also placed an upper bound on the rotation period of 12 hours, a result
consistent with a 2.5899+-0.0003 h period reported in 2022 by P. Pravec (pers. comm.)
A conservative bandwidth of 5 Hz estimated from Arecibo data and the 2.59 h rotation period
place a lower bound on the maximum pole on breadth of 0.46 km that is consistent with the
diameter estimated from WISE data.

Petr Pravec reports that 1989 JA is a binary system (pers. comm.).

In 2022, this asteroid will approach within 0.0269 au (10.5 lunar distances) on May 27, 
when SNRs should be strong enough for detailed delay-Doppler imaging at Goldstone.
Observations are scheduled at Goldstone between May 16-26.

1989 JA has been classified as a "Potentially Hazardous Asteroid" by the Minor Planet Center.




388945 2008 TZ3
2008 TZ3 was discovered by the Mt. Lemmon Survey on October 6, 2008.  This object
is a slow, non-principal axis rotator with a fundamental period of about 39 hours (Pravec et al., pers. comm.)
Warner et al. (2016) report a longer period of ~44 h and a lightcurve amplitude of 0.6 mag,
which suggests an elongated shape.  
Spectroscopy reported by Perna et al. (2018) indicate a C-class taxonomy.

2008 TZ3 was observed with radar in 2018 and 2020.  Based on SNRs obtained during those
apparitions, in 2022 we anticipate obtaining medium-resolution delay-Doppler images 
that resolve the object.  Goldstone observations are scheduled between May 11-18 and also partially
overlap earlier tracks scheduled for 1996 FG3.

Goldstone observations in 2018 revealed a narrow bandwidth consistent
with slow rotation and a circular polarization ratio close to unity that suggests the E spectral
class rather than the C-class.  Arecibo observations in 2020 also revealed a narrow bandwidth but give 
a much lower polarization ratio of about 0.3.  This striking difference between the polarization
ratios at 8560 MHz and 2380 MHz is very puzzling and may be unique among NEAs observed with radar to date.
We hope that new observations in 2022 will help resolve this apparent discrepancy.

If 2008 TZ3 is actually an E-class asteroid, then its optical albedo should be quite high and the 
diameter could be ~200 meters or less, which may explain why the SNRs in 2020 were lower than expected.
The 2018 bandwidth estimated from Goldstone data, combined with the 39 h rotation period, yield a lower
bound on Dmax ~ 0.2 km.   In 2022 we hope to improve estimates of the asteroid's dimensions using
delay-Doppler imaging.

Some of the tracks overlap time scheduled for 1989 JA, 1996 FG3, and 2006 JF42.

This asteroid will approach within 0.0384 au (15 lunar distances) on May 15.  

The Minor Planet Center has classified 2008 TZ3 as a "Potentially Hazardous Asteroid."




2006 JF42
This asteroid was discovered by the Catalina Sky Survey in May, 2006. 
Nothing is known about the physical properties of this asteroid other than its absolute magnitude of 19.2,
which suggests a diameter within a factor of two of 500 meters. 

Update: Goldstone observations on May 4 revealed a relatively narrow bandwidth of only 2 Hz, suggesting
slow rotation.

2006 JF42 will approach within 0.038 au on May 9.  The closest approach occurs when the
asteroid is too far south for Goldstone to track, but observations are scheduled on three dates
straddling the close approach when the asteroid will be within Goldstone's declination window.

We are expecting SNRs strong enough for CW and ranging observations but not strong
enough for detailed delay-Doppler imaging.  Some of the Goldstone tracks overlap time scheduled
for other asteroids.

The Minor Planet Center has classified 2006 JF42 as a "Potentially Hazardous Asteroid."




Orbital and Physical Characteristics  
Name                     1989 JA                 2008 TZ3            2006 JF42
Number                   7335                    388945              467460
Discoverer               E. F. Helin             Mt. Lemmon Survey   Catalina Sky Survey
Discovery date           1989 May 1              2008 Oct 6          2006 May 11
Orbit type               Apollo                  Apollo              Aten
Close approach dist.     0.0269 au               0.0384 au           0.0382 au
Close approach dist.     10.5 lunar distances    14.9 LD             14.9 LD
Close approach date      2022 May 27             2022 May 15         2022 May 9

semimajor axis           1.771 au                1.588 au            0.672 au
eccentricity             0.484                   0.390               0.582
inclination              15.2 deg                8.8 deg             6.0 deg
Orbital period           2.36 years              2.00 y              0.55 y
perihelion distance      0.913 au                0.969 au            0.281 au
aphelion distance        2.628 au                2.208 au            1.063 au
MOID                     0.022 au                0.169 au            0.0029 au

absolute magnitude (H)   17.6                    20.44               19.2
Diameter                 0.93 km                ~0.2 km             ~0.5 km
optical albedo           0.3                     unknown             unknown
Rotation period          2.59 h                  39.15 h             unknown
lightcurve amplitude     unknown                 0.6 mag             unknown
spectral class           unknown                 C?  E?              unknown
                         PHA                     PHA                 PHA
                         BINARY

Last update: 2022 May 20

Goldstone Radar Echoes from Asteroid 2006 JF42


Echo power spectrum from 2006 JF42 obtained on May 4.
Echo power in standard deviations is plotted as a function of Doppler frequency.
Solid and dashed curves denote opposite-sense circular and same-sense circular polarizations.
The frequency resolution is 0.2 Hz and the bandwidth of the echo is about 2 Hz.





Goldstone Radar Echoes from Asteroid 2008 TZ3




Echo power spectrum from 2008 TZ3 obtained on May 10.
Echo power in standard deviations is plotted as a function of Doppler frequency.
Solid and dashed curves denote opposite-sense circular and same-sense circular polarizations.
The frequency resolution is 0.023 Hz and the bandwidth of the echo is about 0.35 Hz.
The narrow bandwidth is consistent with the slow rotation reported by Pravec et al.

The rotation period 39.15 h and the bandwidth of 0.35 Hz place a lower bound on the maximum
pole-on extent of about 140 meters. 

The echo has a very high circular polarization ratio that is close to unity. 




Goldstone Radar Echoes from Asteroid 1989 JA



Echo power spectrum from 1989 JA obtained on May 17.  This is a weighted
sum of 103 runs at 1 Hz resolution.  During the time covered by these
observations, the primary completed 1.9 rotations. If we adopt the 2-sigma levels as an
edge detection threshold, then the bandwidth of the echo is about 26 Hz, 
that, combined with the 2.6 h rotation period, places a lower bound on the
maximum pole-on breadth of about 680 meters.  This is smaller than but consistent
with the diameter of about 900 meters estimated from WISE spacecraft observations.
Detailed delay-Doppler imaging in several days should provide more precise information
on the diameter.

The spectrum above covers about 1.9 rotations.





Echo power spectrum obtained on May 21.  The frequency resolution is 1 Hz.  
The figure shows a weighted sum of 10 runs. The narrow spikes at negative frequencies
correspond to echoes from a secondary object in orbit around the larger primary. 



Collage of delay-Doppler images from May 21.  The resolution is 75 m x 1.9 Hz.
In each panel, range (time delay) increases down and Doppler frequency increases
to the right, so rotation and orbital motion are counterclockwise.  Each panel
is a weighted sum of 13 runs except the last, which is a sum of 7 runs.  
Identical contrast stretches have been applied to each frame.  
The images show two objects whose positions change as a function of time, confirming
the observations by Pravec et al. that 1989 JA is a binary system.





 
Discovery IAU Circular.



1989 JA
http://www.cbat.eps.harvard.edu/iauc/04700/04776.html

2008 TZ3
https://www.minorplanetcenter.net/mpec/K08/K08T79.html

2006 JF42
https://www.minorplanetcenter.net/mpec/K06/K06J49.html





 
SNR Calculations
 

1989 JA
GOLDSTONE SNRs
1989 JA:  D = 0.93 km,  P = 2.2 h,  OC albedo = 0.1

 start date    window       RA, dec   dist  runs   SNR/day SNR/run
2022 May 15  02:30-12:06   226, +10  0.098   177      24      2
2022 May 16  02:26-11:56   225,  +9  0.091   190      32      3  0230-0330   Overlaps JF42
2022 May 17  02:21-11:45   224,  +8  0.083   204      45      3  0430-0935   Almost overlaps TZ3
2022 May 18  02:17-11:32   223,  +6  0.076   220      64      5  0220-0555   Overlaps TZ3
2022 May 19  02:13-11:17   221,  +4  0.069   239      94      7
2022 May 20  02:09-11:00   220,  +2  0.062   259     140     10  0215-0545  
2022 May 21  02:05-10:39   218,   0  0.055   282     220     14  0625-1040  
2022 May 22  02:02-10:12   215,  -4  0.049   305     350     22  0205-0535  
2022 May 23  02:00-09:38   212,  -8  0.043   327     560     34  0200-0550  
2022 May 24  02:02-08:51   207, -14  0.037   337     890     53  0200-0850   Overlaps 1993 EA
2022 May 25  02:10-07:42   201, -22  0.032   315    1300     78  0210-0435  
2022 May 26  02:44-05:44   192, -31  0.029   194    1300     97  0245-0520  

After May 26 this asteroid moves too far south to track at Goldstone.

The 2.59 h rotation period will, all else being equal, increase the SNR/run
by about 10%.

Many of the tracks are long enough to cover more than one full rotation.




2008 TZ3
Goldstone SNRs
2008 TZ3:  D = 0.46 km,  P = 39 h,  OC albedo = 0.1
The diameter of 0.46 km assumes a C-class albedo, which is probably incorrect.
                                                               Wildly Optimistic  Realistic
wk DOY         start date    window      RA, dec   dist   runs  SNR/day SNR/run   SNR/RTT
17 121     2022 May 01     00:08-10:11  180, +15  0.079    231     93      7
18 122     2022 May 02     00:01-09:58  178, +14  0.075    241    110      8
18 122-123 2022 May 02-03  23:53-09:44  176, +13  0.071    252    140     10
18 123-124 2022 May 03-04  23:45-09:29  174, +12  0.067    264    180     12
18 124-125 2022 May 04-05  23:37-09:13  172, +10  0.063    276    220     14         2
18 125-126 2022 May 05-06  23:29-08:55  170,  +9  0.060    288    280     18         3
18 126-127 2022 May 06-07  23:20-08:35  168,  +7  0.056    300    350     22         3              Overlaps FG3 2320-0320
18 127-128 2022 May 07-08  23:11-08:13  165,  +4  0.053    312    440     27         4              Overlaps FG3 2315-0315
18 128-129 2022 May 08-09  23:02-07:49  162,  +2  0.050    322    550     33         5              Overlaps FG3 2305-0425
19 129-130 2022 May 09-10  22:53-07:23  158,  -1  0.047    331    680     41         6              Overlaps FG3 2255-0310
19 130-131 2022 May 10-11  22:43-06:53  154,  -4  0.044    336    820     49         7   0030-0620  Overlaps FG3
19 131-132 2022 May 11-12  22:34-06:19  150,  -7  0.042    336    960     57         8              Overlaps FG3 2235-0225
19 132-133 2022 May 12-13  22:25-05:42  145, -11  0.041    329   1110     65         9
19 133-134 2022 May 13-14  22:16-05:00  140, -15  0.039    315   1100     70        10   0015-0250  Overlaps FG3
19 134-135 2022 May 14-15  22:08-04:15  134, -19  0.039    291   1100     72        10   2215-0115  Overlaps FG3
19 135-136 2022 May 15-16  22:01-03:25  128, -23  0.038    258   1000     69        10   2100-0030  Overlaps FG3
20 136-137 2022 May 16-17  21:56-02:31  122, -26  0.039    218    880     63         9   2305-0230  
20 137-138 2022 May 17-18  21:53-01:33  115, -29  0.040    170    680     55         8   2345-0130
20 138-139 2022 May 18-19  21:55-00:31  108, -32  0.041    116    480     45         6
20 139     2022 May 19     22:11-23:16  102, -34  0.043     45    250     37         5

2008 TZ3 moves too far south to track after May 19.

The "wildly optimistic" SNRs use a diameter computed from assuming a C-class optical
albedo = 0.05, P = 39 h, and a radar albedo = 0.1.  Calibration using radar data obtained
at Arecibo in 2020 suggests that SNRs will be much weaker, hence the "realistic SNRs"
that appear on the right.



2006 JF42

2006 JF42:  D = 0.46 km,  P = 2.2 h,  OC albedo = 0.1

wk DOY  start date    window        RA, dec   dist   runs  SNR/day SNR/run
17 119 2022 Apr 29  11:12-16:56    312, -21  0.072    144     21      2
17 120 2022 Apr 30  11:10-16:31    309, -23  0.067    145     26      2
17 121 2022 May 01  11:10-16:01    307, -25  0.062    143     34      3 
18 122 2022 May 02  11:11-15:23    303, -28  0.057    135     42      4 
18 123 2022 May 03  11:18-14:33    299, -31  0.052    114     50      5 
18 124 2022 May 04  11:43-13:16    294, -34  0.048     59     45      6   Scheduled 1145-1310
...too far south for 10 days...
19 134 2022 May 14  04:15-06:27    195, -33  0.051     78     42      5 
19 135 2022 May 15  03:14-06:43    190, -30  0.056    114     40      4   Scheduled 0315-0640
20 136 2022 May 16  02:30-06:48    186, -27  0.061    128     32      3   Scheduled 0230-0330
20 137 2022 May 17  01:57-06:49    183, -25  0.066    134     26      2
20 138 2022 May 18  01:30-06:48    181, -23  0.071    135     20      2



 
Track Assignments





Goldstone tracks:
        UT        UT                    PDT                          RTT  SNR/
DOY     Date      TX Window  Target     TX Window            Dur'n   sec  run      
...tracks for 1996 FG3 partially overlap 2008 TZ3 but aren't shown...
124     May  4    1145-1310  2006 JF42  0445-0610 May  4     1:25    48    6  SN
131     May 11    0030-0620  2008 TZ3   1730-2320 May 10     4:50    44    7  SN
134     May 14    0105-0250  2008 TZ3   1805-1950 May 13     1:45    39   10  LB
134-135 May 14-15 2215-0115  2008 TZ3   1515-1815 May 14     3:00    39   10  SN
135     May 15    0315-0640  2006 JF42  2015-2340 May 14     3:25    56    4  SN
135-136 May 15-16 2100-0030  2008 TZ3   1400-1730 May 15     3:30    38   10  SN  Also WF Test
136     May 16    0230-0330  1989 JA    1930-2030 May 15     1:00    91    3  JJ  Engineering tests
136     May 16    0230-0330  2006 JF42  1930-2030 May 15     1:00    61    3  JJ  ENGINEERING TESTS
136-137 May 16-17 2305-0230  2008 TZ3   1605-1930 May 16     3:25    39    9  LB. Also engineering tests
137     May 17    0430-0935  1989 JA    2130-0235 May 16-17  5:05    83    3  LB 
137-138 May 17-18 2345-0130  2008 TZ3   1645-1830 May 17     1:45    40    8  MB
138     May 18    0220-0555  1989 JA    1920-2255 May 17     3:35    76    5  MB  Overlaps TZ3
140     May 20    0215-0545  1989 JA    1915-2245 May 19     4:15    62   10  MB
141     May 21    0625-1040  1989 JA    2325-0340 May 20-21  4:15    55   14  SN
142     May 22    0205-0535  1989 JA    1905-2235 May 21     3:30    49   22  SN
143     May 23    0200-0550  1989 JA    1900-2250 May 22     3:50    43   34  LB
144     May 24    0200-0850  1989 JA    1900-0150 May 23-24  6:50    37   53  MB  Overlaps 1993 EA
145     May 25    0210-0435  1989 JA    1910-2135 May 24     2:25    32   78
146     May 26    0245-0520  1989 JA    1945-2220 May 25     2:35    29   97



 


 
Uncertainties



1989 JA
JPL/Horizons solution 102, # obs: 463 (1989-2022)
2022 Apr 13
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.             delta  POS_3sigma   DOP_X_3sig  RT_delay_3sig
 2022-May-15 00:00 *   225.95148  10.08650  0.10034830791866       1.726         1.81       0.000743 
 2022-May-16 00:00 *   225.15811   9.14018  0.09286215933181       1.850         1.93       0.000760
 2022-May-17 00:00 *   224.23687   8.00824  0.08545646679117       1.992         2.07       0.000779
 2022-May-18 00:00 *   223.15474   6.64228  0.07814452957452       2.154         2.22       0.000798
 2022-May-19 00:00 *   221.86622   4.97608  0.07094573160867       2.340         2.39       0.000819
 2022-May-20 00:00 *   220.30714   2.91751  0.06388858726174       2.559         2.56       0.000841
 2022-May-21 00:00 *   218.38436   0.33654  0.05701572241670       2.818         2.74       0.000863
 2022-May-22 00:00 *   215.95830  -2.95177  0.05039220437237       3.132         2.89       0.000884
 2022-May-23 00:00 *   212.81214  -7.20801  0.04411957036104       3.530         3.04       0.000902
 2022-May-24 00:00 *   208.59582 -12.78025  0.03835883231590       4.063         3.53       0.000911
 2022-May-25 00:00 *   202.72437 -20.05603  0.03336410801178       4.829         5.62       0.000898
 2022-May-26 00:00 *   194.20946 -29.20835  0.02951444604961       5.929        10.62       0.000846
 2022-May-27 00:00 *   181.50657 -39.52422  0.02728671397482       7.245        17.75       0.000731



2008 TZ3
JPL/Horizons solution 187, # obs: 1285 (2008-2022)
2022 Apr 13
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.             delta  POS_3sigma   DOP_X_3sig  RT_delay_3sig
 2022-May-06 00:00 *m  170.58408   8.83067  0.06018635273313       0.286         0.28       0.000120
 2022-May-07 00:00 *m  168.08201   6.96676  0.05664517956222       0.293         0.27       0.000122
 2022-May-08 00:00 *m  165.30090   4.83619  0.05328679547469       0.302         0.27       0.000124
 2022-May-09 00:00 *m  162.20007   2.40732  0.05014549777617       0.315         0.28       0.000125
 2022-May-10 00:00 *m  158.73505  -0.34712  0.04726268749376       0.334         0.32       0.000125
 2022-May-11 00:00 *m  154.85958  -3.44309  0.04468707826575       0.361         0.41       0.000124
 2022-May-12 00:00 *m  150.52938  -6.87513  0.04247383309611       0.398         0.55       0.000122
 2022-May-13 00:00 *m  145.70861 -10.60413  0.04068195363768       0.444         0.73       0.000118
 2022-May-14 00:00 *   140.37941 -14.54620  0.03936937347763       0.499         0.93       0.000113
 2022-May-15 00:00 *   134.55396 -18.56891  0.03858585178539       0.554         1.14       0.000106
 2022-May-16 00:00 *   128.28677 -22.50194  0.03836495996156       0.604         1.31       0.000097
 2022-May-17 00:00 *   121.68220 -26.16406  0.03871763242349       0.641         1.42       0.000088
 2022-May-18 00:00 *   114.89140 -29.39919  0.03962984549772       0.662         1.47       0.000079
 2022-May-19 00:00 *   108.09533 -32.10663  0.04106544278925       0.666         1.46       0.000071




2006 JF42
JPL/Horizons solution 45, # obs: 200 (2006-2021)
2022 Apr 14
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.             delta  POS_3sigma   DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2022-May-03 00:00 *m  301.36555 -28.97039  0.05476324943005       1.220         0.54        1.96       0.001216
 2022-May-04 00:00 *m  296.52816 -31.96464  0.05032172159544       1.456         0.86        3.13       0.001196
 2022-May-05 00:00 *m  290.37781 -35.25010  0.04635342170108       1.919         1.36        4.95       0.001160
 2022-May-06 00:00 *m  282.51950 -38.66392  0.04299891149617       2.605         2.07        7.51       0.001101
 2022-May-07 00:00 *m  272.58736 -41.86108  0.04042022111426       3.456         2.94       10.70       0.001013
 2022-May-08 00:00 *m  260.51218 -44.29600  0.03878059662159       4.347         3.86       14.04       0.000891
 2022-May-09 00:00 *m  246.91491 -45.37341  0.03820821029374       5.104         4.60       16.73       0.000740
 2022-May-10 00:00 *m  233.17451 -44.78844  0.03875611926203       5.568         4.96       18.02       0.000573
 2022-May-11 00:00 *m  220.75532 -42.75610  0.04038303695995       5.681         4.87       17.70       0.000408
 2022-May-12 00:00 *m  210.43476 -39.84112  0.04296945100646       5.497         4.45       16.16       0.000273
 2022-May-13 00:00 *m  202.24293 -36.60892  0.04635664645337       5.125         3.86       14.03       0.000206
 2022-May-14 00:00 *   195.84279 -33.43819  0.05038392255603       4.671         3.25       11.82       0.000226
 2022-May-15 00:00 *   190.83361 -30.51941  0.05491031324597       4.206         2.70        9.81       0.000290
 2022-May-16 00:00 *   186.87339 -27.91941  0.05982165214886       3.769         2.23        8.10       0.000360
 2022-May-17 00:00 *   183.70114 -25.63994  0.06502928280284       3.376         1.84        6.69       0.000422




Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination:

1989 JA
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.             delta    APmag   S-brt     S-O-T /r   T-O-M/MN_Illu%
 2022-Apr-15 00:00     231.50107  14.09298  0.35399648786284   17.177   6.081  143.1929 /L    48.8/ 95.8681
 2022-Apr-17 00:00     231.59691  14.28908  0.33514029477475   17.030   6.053  143.8989 /L    33.1/ 99.9093
 2022-Apr-19 00:00     231.65370  14.46475  0.31659924783561   16.878   6.026  144.5627 /L    35.1/ 93.4625
 2022-Apr-21 00:00     231.66849  14.61565  0.29836392951109   16.722   5.999  145.1834 /L    53.8/ 77.4333
 2022-Apr-23 00:00     231.63773  14.73656  0.28042594354674   16.561   5.972  145.7606 /L    77.2/ 55.7854
 2022-Apr-25 00:00     231.55734  14.82104  0.26277744609511   16.393   5.946  146.2947 /L   100.9/ 33.5802
 2022-Apr-27 00:00     231.42272  14.86121  0.24541042814526   16.219   5.921  146.7873 /L   123.1/ 15.1915
 2022-Apr-29 00:00     231.22854  14.84729  0.22831619979715   16.037   5.896  147.2409 /L   141.2/  3.5648
 2022-May-01 00:00     230.96825  14.76715  0.21148522933095   15.847   5.871  147.6595 /L   148.7/  0.0284
 2022-May-03 00:00     230.63342  14.60550  0.19490735303126   15.645   5.847  148.0495 /L   140.3/  4.3881
 2022-May-05 00:00     230.21273  14.34261  0.17857235234560   15.432   5.823  148.4194 /L   123.3/ 15.3661
 2022-May-07 00:00     229.69046  13.95227  0.16247087888536   15.203   5.799  148.7810 /L   103.5/ 31.1990
 2022-May-09 00:00     229.04418  13.39855  0.14659576211989   14.955   5.775  149.1499 /L    82.3/ 49.9863
 2022-May-11 00:00     228.24088  12.63016  0.13094394808135   14.685   5.750  149.5458 /L    60.3/ 69.5472
 2022-May-13 00:00     227.23030  11.57084  0.11551974341814   14.387   5.724  149.9925 /T    38.5/ 86.9049
 2022-May-15 00:00     225.93257  10.10152  0.10034083297367   14.053   5.697  150.5140 /T    25.0/ 98.0316
 2022-May-17 00:00     224.21430   8.02549  0.08545014844655   13.673   5.667  151.1192 /T    37.3/ 98.9953
 2022-May-19 00:00     221.83866   4.99637  0.07094060879692   13.238   5.636  151.7447 /T    63.2/ 88.6013
 2022-May-21 00:00     218.34964   0.36127  0.05701185307166   12.740   5.614  152.0443 /T    92.1/ 69.7769
 2022-May-23 00:00     212.76661  -7.17625  0.04411704388289   12.208   5.631  150.6520 /T   121.9/ 47.6927
 2022-May-25 00:00     202.66238 -20.01180  0.03336302950758   11.787   5.776  143.4250 /T   149.6/ 27.0884
 2022-May-27 00:00     181.43011 -39.45701  0.02728693073343   11.857   6.135  124.3324 /T   141.9/ 11.2332
 2022-May-29 00:00     140.23340 -53.57224  0.02891058847651   12.766   6.595   98.4747 /T   105.2/  2.0367
 2022-May-31 00:00     103.33629 -51.64033  0.03718793411507   14.035   6.977   79.8121 /T    80.6/  0.2813
 2022-Jun-02 00:00      85.68270 -45.83433  0.04881674957230   15.114   7.231   69.4804 /T    73.9/  5.7750
 2022-Jun-04 00:00      77.02000 -41.23248  0.06192163323836   15.917   7.380   63.8090 /T    79.9/ 17.5789




2008 TZ3
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.             delta    APmag   S-brt     S-O-T /r   T-O-M/MN_Illu%
 2022-Apr-15 00:00     194.36967  20.85818  0.15439996990174   17.894    n.a.  148.2565 /T    20.9/ 95.8681
 2022-Apr-17 00:00     193.24686  20.71659  0.14430994746618   17.773    n.a.  146.8042 /T    33.7/ 99.9093
 2022-Apr-19 00:00     191.99132  20.47169  0.13443966837432   17.648    n.a.  145.2023 /T    59.5/ 93.4625
 2022-Apr-21 00:00     190.58239  20.10387  0.12478282060574   17.520    n.a.  143.4463 /T    87.8/ 77.4333
 2022-Apr-23 00:00     188.99374  19.58779  0.11533767394604   17.387    n.a.  141.5261 /T   116.1/ 55.7854
 2022-Apr-25 00:00     187.19178  18.89034  0.10610734904828   17.250    n.a.  139.4238 /T   143.2/ 33.5802
 2022-Apr-27 00:00     185.13293  17.96765  0.09710084003370   17.107    n.a.  137.1109 /T   164.9/ 15.1915
 2022-Apr-29 00:00     182.75944  16.76095  0.08833549741430   16.959    n.a.  134.5436 /T   155.0/  3.5648
 2022-May-01 00:00     179.99323  15.19037  0.07984150701554   16.806    n.a.  131.6555 /T   130.4/  0.0284
 2022-May-03 00:00     176.72728  13.14641  0.07166917087238   16.652    n.a.  128.3480 /T   104.6/  4.3881
 2022-May-05 00:00     172.81404  10.47921  0.06390028727035   16.500    n.a.  124.4765 /T    78.5/ 15.3661
 2022-May-07 00:00     168.05123   6.98931  0.05666536162603   16.362    n.a.  119.8372 /T    52.2/ 31.1990
 2022-May-09 00:00     162.16856   2.43435  0.05016780096956   16.255    n.a.  114.1657 /T    26.4/ 49.9863
 2022-May-11 00:00     154.82907  -3.40969  0.04471101966093   16.213    n.a.  107.1877 /T    18.6/ 69.5472
 2022-May-13 00:00     145.68225 -10.56248  0.04070648790994   16.282    n.a.   98.7939 /T    45.6/ 86.9049
 2022-May-15 00:00     134.53639 -18.51877  0.03860927170964   16.512    n.a.   89.3709 /T    78.1/ 98.0316
 2022-May-17 00:00     121.67822 -26.10880  0.03873796556916   16.914    n.a.   80.0049 /T   106.8/ 98.9953
 2022-May-19 00:00     108.10681 -32.05233  0.04108125929168   17.431    n.a.   72.0378 /T   120.3/ 88.6013
 2022-May-21 00:00      95.21827 -35.81559  0.04530383768735   17.961    n.a.   66.2406 /T   111.9/ 69.7769
 2022-May-23 00:00      84.06166 -37.71410  0.05094303658104   18.427    n.a.   62.5712 /T    93.0/ 47.6927

2006 JF42

 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.             delta    APmag   S-brt     S-O-T /r   T-O-M/MN_Illu%
 2022-May-01 00:00     308.34540 -23.98429  0.06460065138362   16.097    n.a.   95.9099 /L    97.5/  0.0284
 2022-May-02 00:00     305.23144 -26.30868  0.05952513047382   15.790    n.a.  100.1455 /L   113.0/  1.2829
 2022-May-03 00:00     301.37806 -28.96470  0.05472230338851   15.464    n.a.  104.9652 /L   128.9/  4.3881
 2022-May-04 00:00     296.53760 -31.96143  0.05027979842125   15.122    n.a.  110.4747 /L   145.2/  9.1549
 2022-May-05 00:00     290.38196 -35.25003  0.04631091456485   14.769    n.a.  116.7626 /L   161.0/ 15.3661
 2022-May-06 00:00     282.51501 -38.66722  0.04295647678649   14.415    n.a.  123.8501 /L   168.2/ 22.7921
 2022-May-07 00:00     272.56992 -41.86688  0.04037883780333   14.077    n.a.  131.6004 /L   154.4/ 31.1990
 2022-May-08 00:00     260.47807 -44.30161  0.03874153648899   13.778    n.a.  139.5828 /L   135.0/ 40.3480
 2022-May-09 00:00     246.86430 -45.37470  0.03817285105278   13.552    n.a.  146.9248 /L   114.4/ 49.9863
 2022-May-10 00:00     233.11327 -44.78202  0.03872562954047   13.438    n.a.  152.2835 /L    93.5/ 59.8307
 2022-May-11 00:00     220.69173 -42.74136  0.04035810172966   13.473    n.a.  154.3466 /T    73.1/ 69.5472
 2022-May-12 00:00     210.37488 -39.81990  0.04295020167486   13.648    n.a.  153.0312 /T    54.0/ 78.7322
 2022-May-13 00:00     202.18939 -36.58384  0.04634278875772   13.911    n.a.  149.6216 /T    37.6/ 86.9049
 2022-May-14 00:00     195.79595 -33.41148  0.05037493255493   14.208    n.a.  145.4318 /T    27.4/ 93.5225
 2022-May-15 00:00     190.79289 -30.49258  0.05490559656862   14.509    n.a.  141.1875 /T    29.2/ 98.0316
 2022-May-16 00:00     186.83791 -27.89332  0.05982063716381   14.800    n.a.  137.1877 /T    40.8/ 99.9547
 2022-May-17 00:00     183.67007 -25.61503  0.06503146154276   15.077    n.a.  133.5234 /T    55.9/ 98.9953
 2022-May-18 00:00     181.09813 -23.63069  0.07047056934628   15.336    n.a.  130.1983 /T    72.0/ 95.1235
 2022-May-19 00:00     178.98323 -21.90420  0.07608673075368   15.579    n.a.  127.1831 /T    88.0/ 88.6013
 2022-May-20 00:00     177.22409 -20.39921  0.08184085178857   15.807    n.a.  124.4399 /T   103.6/ 79.9353
 2022-May-21 00:00     175.74603 -19.08286  0.08770275287481   16.019    n.a.  121.9306 /T   118.6/ 69.7769





 
Setups





CW setup:
TX polarization     RCP
RCV polarization    LCP & RCP
Frequency hops:     no hopping
Bandwidth:          5000 Hz 
TXoffset            +500 Hz
FFT                 5000 for 1 Hz resolution 


Ranging setups:
---------------------------------------------------------------------------
10-usec
baud             10 usec
code            127
PRP            1270 usec
FFT             128   
ncoh              1 
bandwidth       787 Hz   
resolution       12.3 Hz
TXOFF          +100 Hz  (echo in bin 32 + 8 = 40)
---------------------------------------------------------------------------
11-usec 
baud             11 usec
code            127
PRP            1397 usec
FFT              64  
ncoh              1 
bandwidth       716 Hz   
resolution       11.2 Hz
TXOFF          +100 Hz  (echo in bin 32 + 9 = 41) 
-------------------------------------------------------------------------
1-usec 
baud              1 usec
code            255
FFT             256
ncoh             16
bandwidth       245 Hz   
resolution        0.96 Hz
TXOFF           +50 Hz 
Time delay extent: 38250 meters
---------------------------------------------------------------------
1/2-usec
baud            1/2 usec
code            255
FFT             256
ncoh             16
bandwidth       490.2 Hz
resolution        1.9 Hz
TXOFF           +50 Hz
---------------------------------------------------------------------






 
Instructions

NOTE: Data should be moved to the appropriate subdirectories in
      aardvark:/export/data0/a7335/raw/



POINTING: 


  OSOD and predicts will be on aardvark:

...not available yet...


POINTING  
                                                          TX Offsets    
Date (UTC)   DOY  hhmmss    RA        Dec         Macro   LHA     Dec    RTT    OSOD

... to be added ...

Transmit offsets are given in millidegrees.  



PRDX.OUT.14f-14-14.??
TRANSMITTER: STATION #14,     RECEIVER: STATION #14
RECEIVER    U.T.         RANGE         DOPPLER      LHA      DEC      RA      EL




 
1989 JA GOLDSTONE MASTERLOG

==============================================================================
                                                   Receive                     TX
Setup     hops  dwell   code  ncoh    FFT   runs   start -stop   OSOD  offset  Poln  Notes
------------------------------------------------------------------------------







  Dr. Lance A. M. Benner             |   PHONE:  (818) 354-7412
  Mail Stop 183-601                  |   FAX:    (818) 393-4445
  Jet Propulsion Laboratory          |   email:  lance.benner@jpl.nasa.gov
  California Institute of Technology |   Plan:   To live long and prosper
  Pasadena, CA 91109-8099            

http://echo.jpl.nasa.gov/asteroids/1989JA/1989JA.2022.goldstone.planning.html





Asteroid Radar Astronomy




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