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
*************************************************************************************************************