Goldstone Radar Observations Planning: (137170) 1999 HF1, 2022 ER5, 2022 DP3, and 2022 EO4


Background


(137170) 1999 HF1
1999 HF1 was discovered on April 20, 1999 by LONEOS.  
1999 HF1 is a binary near-Earth asteroid (Pravec et al. 2002) that has not yet been
observed by radar. 

This object has been observed extensively with photometry, spectroscopy, and infrared radiometry.
The primary has a rotation period of 2.32 h and a lightcurve amplitude of about 0.1 mag, suggesting
a shape with low elongation.  Published estimates of the diameter vary from 3.8 to 5.1 km.
Consequently, 1999 HF1 could be one of the largest known binary NEAs.

The spectral class is indeterminate: X or C/X.  The diameter estimates from
infrared observations correspond to optical albedos between 0.1 to 0.5.  The X group is ambiguous in the
absence of an optical albedo measurement and could indicate an E-, M-, or P-type taxonomy.  These spectral
classes imply very different compositions, so the radar observations (even a null result) will provide
useful measurements.   If HF1 is an E-type object, then the diameter could be ~2.5 km, and we will struggle
to detect echoes.  If this is a metallic M-class object, then the radar albedo could be very high and the
SNRs might be strong enough for coarse-resolution imaging.

A major goal of the observations is to estimate the diameter, compute the optical albedo, and 
constrain the spectral class.

The secondary has an orbital period of 14.0 h that is among the most rapid known for NEAs with companions.
The secondary/primary diameter ratio is about 0.2, implying a secondary diameter of roughly 0.8 km if the
diameter of the primary is about 3.8 km.

1999 HF1 will make a relatively distant approach within 0.182 au in mid March and
Goldstone observations are scheduled on three tracks between March 14 - 20.  
We are expecting SNRs sufficient for CW and ranging observations but probably not strong
enough for detailed imaging.


2022 ER5 2022 ER5 was discovered on March 11, 2022 by Pan-STARRS 2. This asteroid will approach within two lunar distances (0.0054 au) on March 20 and it will be a strong radar target. Nothing is known about its physical properties other than its absolute magnitude of 25.6, which suggests a diameter of roughly 23 meters. The view periods for 2022 ER5 overlap those scheduled for 1999 HF1 on March 18 and 19/20. This asteroid will brighten to about 17th magnitude, but it will be less than 40 degrees from the full Moon until March 19, so optical observations could be challenging. Additional astrometry is necessary to reduce the pointing uncertainties and would be greatly appreciated!
2022 DP3 2022 DP3 was discovered on February 26, 2022 at the Kitt Peak Bok 2.25 m telescope in Arizona. This asteroid has an absolute magnitude 24.6 that suggests a diameter of 30-40 meters but otherwise nothing is known about its physical properties. 2022 DP3 will approach within 0.0077 au (3 lunar distances) on March 15, when it should be a strong radar target suitable for imaging at 3.75 meter resolution. View periods for 2022 DP3 overlap those already scheduled for 1999 HF1 on one day: March 14. DP3 should be a much stronger target than HF1 and it is likely we will start the track by observing DP3.
2022 EO4 2022 EO4 was discovered by the Mt. Lemmon Survey on 2022 March 9. 2022 EO4 has an absolute magnitude of 25.4 that suggests a diameter of 20-30 meters. Nothing else is known about its physical properties. This asteroid will approach within 0.0071 au on March 13 and it could be a moderately strong radar target with SNRs strong enough for CW observations, ranging, and possibly imaging. The view periods overlap time already scheduled for 1999 HF1 during the last hour of the track on March 14.
Orbital and Physical Characteristics  
Name                     1999 HF1                 2022 DP3           2022 EO4             2022 ER5
Number                   137170                   Not numbered       Not numbered         Not numbered
Discoverer               LONEOS                   Kitt Peak-Bok      Mt. Lemmon Survey    Pan-STARRS 2
Discovery date           1999 Apr 20              2022 Feb 26        2022 Mar  9          2022 Mar 11
orbit type               Aten                     Apollo             Apollo               Apollo

Close approach dist.     0.182 au                 0.0077au (3 LD)    0.0071 au (2.8 LD)   0.0054 au (2.1 LD)
Close approach date      2022 March 16            2022 March 15      2022 Mar 13          2022 Mar 20

semimajor axis           0.819 au                 1.258 au           1.750 au             2.135 au
eccentricity             0.462 au                 0.237              0.563                0.567
inclination             25.7 deg                  17.5 deg           6.9 deg              10.3 deg 
Orbital period           0.741 years              1.41 y             2.32 y               3.12 y
Perihelion distance      0.440 au                 0.960 au           0.765 au             0.924 au
aphelion distance        1.197 au                 1.556 au           2.735 au             3.346 au
MOID                     0.173 au                 0.0063 au          0.0051 au            0.00405 au

absolute magnitude (H)   14.6                     24.6               25.4                 25.6
Primary diameter         3.8 km                  ~37 meters         ~26 meters           ~23 meters
Secondary diameter      ~0.8  km 
Primary rotation period  2.32 h                   Unknown            Unknown              Unknown
lightcurve amplitude    ~0.1                      Unknown            Unknown              Unknown
Secondary orbital period 14.0 h synchronous
spectral class           X, C                     Unknown            Unknown              Unknown
                         Binary                          

LD = 1 lunar distance (0.00257 au or 384,400 km)

Last update: 2022 March 21


Goldstone Radar Echoes from Asteroid 1999 HF1


Echo power spectrum from 1999 HF1 obtained on March 18.
Echo power in standard deviations is plotted as a function of Doppler frequency.
The frequency resolution is 5 Hz.  

The bandwidth of about 100 Hz and the 2.32 h rotation period place a lower
bound on the maximum pole-on breadth of 2.55 km.  At face value, 2.55 km is 
smaller than previous estimates, but it's a _lower_ bound, so it's consistent.
One possibility is that the subradar latitude was well off the equator 
(note that the pole direction is unknown).

The circular polarization ratio is about 0.4.  E-class NEAs observed by radar
have ratios larger than 0.8, so it seems very unlikely that HF1 is an E-type object.


Echo power spectrum obtained on March 19-20.


Goldstone Radar Echoes from Asteroid 2022 ER5


Echo power spectrum from 2022 ER5 obtained on March 20.
Echo power in standard deviations is plotted as a function of Doppler frequency.
The frequency resolution is 1 Hz.  This echo was obtained using JPL/Horizons
solution 7, which had a 3-sigma Doppler uncertainty of about 400 Hz.  Consequently
the Doppler correction of about -50 Hz is well within 1-sigma.

The bandwidth of about 10 Hz and the absolute magnitude of 25.5, which suggests
a diameter of 20-30 meters, strongly imply that this asteroid is a rapid rotator
with a period of less than about 0.5 hours.  The round-trip light travel time during
these observations was about 5.5 seconds (corresponding to a distance of about 2.1
Earth-Moon distances). 


Echo power spectrum obtained using solution 8.  This spectrum is a weighted sum
of 17 runs at 1 Hz resolution. 


Discovery M.P.E.C.


1999 HF1
https://www.minorplanetcenter.net/mpec/J99/J99H17.html

2022 ER5
https://www.minorplanetcenter.net/mpec/K22/K22EJ7.html

2022 DP3
https://www.minorplanetcenter.net/mpec/K22/K22DB7.html

2022 EO4
https://www.minorplanetcenter.net/mpec/K22/K22EG0.html


SNR Calculations


1999 HF1
GOLDSTONE SNRs
1999 HF1:  D = 3.8 km,  P = 2.32 h,  OC albedo = 0.1

3.8 km is the smallest of the diameters published for this object.  Other values are 
between 4.4 - 5.1 km.  Consequently, the SNRs could be stronger than shown below.

wk   DOY    start date    window      RA, dec   dist  runs  SNR/day SNR/run
10 71-72 2022 Mar 12-13  14:29-01:52  356, +30  0.186   110     19      2
10 72-73 2022 Mar 13-14  14:16-01:58  356, +33  0.184   115     20      2 
11 73-74 2022 Mar 14-15  14:02-02:04  356, +37  0.182   119     21      2  Scheduled on Mar 14    1405-1720
11 74-75 2022 Mar 15-16  13:48-02:11  356, +41  0.182   123     21      2 
11 75-76 2022 Mar 16-17  13:33-02:19  356, +44  0.182   126     22      2 
11 76-77 2022 Mar 17-18  13:17-02:27  356, +48  0.183   130     22      2  Scheduled on Mar 18    0030-0230
11 77-78 2022 Mar 18-19  13:01-02:36  356, +51  0.185   133     21      2
11 78-79 2022 Mar 19-20  12:43-02:47  356, +54  0.187   136     21      2  Scheduled on Mar 19-20 2105-0100
11 79-80 2022 Mar 20-21  12:24-03:00  356, +58  0.190   139     20      2
12 80-81 2022 Mar 21-22  12:03-03:15  356, +61  0.193   142     19      2
12 81-82 2022 Mar 22-23  11:40-03:33  356, +64  0.197   145     18      2

Elevations will be less than 75 deg during all the tracks.


2022 ER5 2022 ER5: D = 0.024 km, P = 0.5 h, OC albedo = 0.1 start date window RA, dec dist runs SNR/day SNR/run 2022 Mar 17 01:14-09:34 138, -3 0.022 696 17 1 2022 Mar 18 00:51-09:52 138, +4 0.015 1094 82 3 Overlaps 1999 HF1 0055-0230 2022 Mar 19 00:07-10:41 137, +20 0.009 2188 760 18 2022 Mar 19-20 22:01-07:29 128, +72 0.005 6635 7100 98 Overlaps 1999 HF1 2205-0100 2022 Mar 20 07:29-14:08 38, +86 0.006 7728 6400 76 2022 Mar 20-21 14:08-00:52 328, +71 0.007 5218 3100 47 2022 Mar 21 10:43-23:24 321, +43 0.012 1914 230 6 2022 Mar 22 11:13-22:55 320, +34 0.019 1144 39 1 2022 ER5 is circumpolar for a couple of days.
2022 DP3 2022 DP3: D = 0.037 km, P = 0.5 h, OC albedo = 0.1 start date window RA, dec dist runs SNR/day SNR/run 2022 Mar 11 05:08-21:05 250, +63 0.027 1056 20 1 2022 Mar 12 05:51-21:23 259, +60 0.021 1314 53 2 2022 Mar 13 07:01-21:42 272, +55 0.015 1701 190 5 2022 Mar 14 08:54-21:50 291, +40 0.010 2229 900 21 Overlaps 1999 HF1 1405-1720 2022 Mar 15 11:49-21:20 311, +3 0.008 2127 2300 53 2022 Mar 16 16:35-19:04 330, -33 0.010 404 270 14 Moves too far south for Goldstone to track after March 16.
2022 EO4 2022 EO4: D = 0.026 km, P = 0.5 h, OC albedo = 0.1 start date window RA, dec dist runs SNR/day SNR/run 2022 Mar 11 04:51-10:07 165, -24 0.024 401 9 0 2022 Mar 12 06:38-08:28 170, -33 0.015 208 27 2 ...too far south during closest approach on March 13... 2022 Mar 14 16:39-20:08 325, -31 0.011 547 140 6 Overlaps 1999 HF1 1640-1720 2022 Mar 15 14:56-22:02 332, -13 0.019 673 29 1 2022 Mar 16 14:33-22:30 334, -7 0.028 519 7 0

Track Assignments



Goldstone tracks:
         UT         UT                    PDT                 Duration RTT    SNR/
DOY      Date       TX Window             TX Window           hh:mm    (sec)  run      
73       Mar 14     1405-1720  1999 HF1   0705-1020 Mar 14     3:15    182      2   Not observed due to equipment problems
73       Mar 14     1405-1720  2022 DP3   0705-1020 Mar 14     3:15     10     21   Not observed due to equipment problems
73       Mar 14     1640-1720  2022 EO4   0940-1020 Mar 14     0:40     11      6   Not observed due to equipment problems

77       Mar 18     0030-0230  1999 HF1   1730-1930 Mar 17     2:00    183      2
77       Mar 18     0055-0230  2022 ER5   1755-1930 Mar 17     1:35     15      3

78-79    Mar 19-20  2105-0100  1999 HF1   1405-1800 Mar 19     3:55    187      2
78-79    Mar 19-20  2205-0100  2022 ER5   1505-1800 Mar 19     2:55      5     98  



Uncertainties


1999 HF1
JPL/Horizons solution 468, # obs: 3799 (1999-2021) 
2022 March 4
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.             delta  POS_3sigma   DOP_X_3sig  RT_delay_3sig
 2022-Mar-13 00:00 *m  355.56739  30.36745  0.18549678251933       0.618         2.43       0.000323
 2022-Mar-14 00:00 *m  355.56320  33.93681  0.18354820316733       0.621         2.39       0.000319
 2022-Mar-15 00:00 *m  355.55615  37.53459  0.18237111170016       0.621         2.33       0.000316
 2022-Mar-16 00:00 *m  355.54709  41.13127  0.18195343356564       0.617         2.24       0.000315
 2022-Mar-17 00:00 *   355.53691  44.69780  0.18227482709630       0.610         2.13       0.000314
 2022-Mar-18 00:00 *   355.52658  48.20696  0.18330732771597       0.601         2.01       0.000314
 2022-Mar-19 00:00 *   355.51713  51.63452  0.18501642206139       0.589         1.88       0.000314
 2022-Mar-20 00:00 *   355.50973  54.96005  0.18736242495498       0.575         1.75       0.000314
 2022-Mar-21 00:00 *   355.50567  58.16738  0.19030200716984       0.560         1.61       0.000315


2022 ER5 JPL/Horizons solution 7, # obs: 54 (7 days) 2022 Mar 19 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig 2022-Mar-16 00:00 *m 138.47211 -7.14657 0.03016528364508 0.814 1387.63 0.060398 2022-Mar-17 00:00 * 138.27860 -4.05545 0.02322747102202 1.108 1369.84 0.046617 2022-Mar-18 00:00 * 137.95754 1.63373 0.01641740479871 1.437 1328.32 0.033108 2022-Mar-19 00:00 * 137.22304 14.95671 0.00999067147471 2.597 1185.16 0.020389 2022-Mar-20 00:00 * 133.11576 58.29222 0.00550609311666 21.644 392.81 0.011410 * 2022-Mar-21 00:00 * 323.29372 59.97722 0.00781652868968 25.590 989.10 0.015442 2022-Mar-22 00:00 * 320.56472 39.60336 0.01385957343706 16.814 1286.76 0.027230 JPL/Horizons solution 6, # obs: 42 (7 days) 2022 Mar 18 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig 2022-Mar-16 00:00 *m 138.47212 -7.14657 0.03016158704792 1.242 2298.15 0.100666 2022-Mar-17 00:00 * 138.27861 -4.05545 0.02322462059067 1.542 2268.76 0.077844 2022-Mar-18 00:00 * 137.95756 1.63372 0.01641538389703 2.007 2200.69 0.055472 2022-Mar-19 00:00 * 137.22308 14.95671 0.00998943168958 9.466 1970.08 0.034385 2022-Mar-20 00:00 * 133.11588 58.29243 0.00550540110439 66.492 731.68 0.019216 * 2022-Mar-21 00:00 * 323.29355 59.97693 0.00781557774028 62.835 1605.61 0.025254 2022-Mar-22 00:00 * 320.56466 39.60314 0.01385789549136 36.071 2123.35 0.044616 JPL/Horizons solution 5, # obs: 38 (5 days) 2022 Mar 17 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig 2022-Mar-16 00:00 *m 138.47214 -7.14661 0.03015134052915 1.578 2704.00 0.114431 2022-Mar-17 00:00 * 138.27866 -4.05569 0.02321721715844 4.103 2669.01 0.087681 2022-Mar-18 00:00 * 137.95766 1.63279 0.01641075742743 14.572 2584.10 0.061559 * 2022-Mar-19 00:00 * 137.22342 14.95267 0.00998733209538 63.302 2270.47 0.037261 2022-Mar-20 00:00 * 133.11998 58.27318 0.00550413421497 306.070 1044.69 0.020920 * 2022-Mar-21 00:00 * 323.29592 59.98970 0.00781123966268 208.305 2174.96 0.032295 2022-Mar-22 00:00 * 320.56497 39.60822 0.01385055347065 87.089 2554.29 0.056290 JPL/Horizons solution 3, # obs: 28 (3 days) 2022 Mar 14 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig 2022-Mar-16 00:00 *m 138.47238 -7.14720 0.03013916065028 17.020 3840.13 0.147093 2022-Mar-17 00:00 * 138.27909 -4.05734 0.02320981762862 45.889 3782.28 0.112864 2022-Mar-18 00:00 * 137.95852 1.62783 0.01640797891306 135.069 3619.77 0.082548 * 2022-Mar-19 00:00 * 137.22568 14.93398 0.00998847998814 504.833 2958.92 0.059443 2022-Mar-20 00:00 * 133.14023 58.19192 0.00550403158414 2201.405 7011.32 0.030376 * 2022-Mar-21 00:00 * 323.30291 60.04131 0.00780078357557 1399.070 5296.52 0.069300 2022-Mar-22 00:00 * 320.56512 39.62836 0.01383381984384 551.131 3981.91 0.111720 JPL/Horizons solution 2, # obs: 25 (2 days) 2022 Mar 13 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig 2022-Mar-16 00:00 *m 138.47251 -7.14756 0.03013284095445 44.863 4750.59 0.230944 2022-Mar-17 00:00 * 138.27931 -4.05828 0.02320598596794 118.782 4680.05 0.198512 2022-Mar-18 00:00 * 137.95896 1.62511 0.01640655005394 343.990 4491.98 0.172402 * 2022-Mar-19 00:00 * 137.22684 14.92399 0.00998908538879 1269.289 4183.68 0.149215 2022-Mar-20 00:00 * 133.15074 58.14918 0.00550395210089 5486.275 18234.17 0.070345 * 2022-Mar-21 00:00 * 323.30661 60.06817 0.00779528680232 3478.090 9682.13 0.117876 2022-Mar-22 00:00 * 320.56521 39.63872 0.01382505628796 1372.107 5147.13 0.179137
2022 DP3 JPL/Horizon solution 7, # obs: 59 (14 days), OCC = 7 2022 March 13 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig 2022-Mar-12 00:00 *m 253.30901 61.87001 0.02416962400731 2.332 2565.80 0.104798 2022-Mar-13 00:00 *m 263.84598 58.57243 0.01839352367633 3.601 2458.50 0.079631 2022-Mar-14 00:00 *m 278.48833 50.69230 0.01301188046474 7.560 2178.43 0.056232 2022-Mar-15 00:00 *m 297.10561 30.25682 0.00879787207899 21.076 1292.44 0.038042 2022-Mar-16 00:00 *m 316.75410 -8.76886 0.00792713939471 35.169 706.80 0.034604 JPL/Horizons solution 4, # obs: 32 (10 days) 2022 March 8 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig 2022-Mar-12 00:00 *m 253.30910 61.87020 0.02418718046163 36.148 4806.91 0.200072 2022-Mar-13 00:00 *m 263.84601 58.57278 0.01840698045077 82.826 4608.75 0.153600 2022-Mar-14 00:00 *m 278.48822 50.69307 0.01302150776594 210.879 4108.80 0.110476 2022-Mar-15 00:00 *m 297.10526 30.25889 0.00880443379524 570.218 2895.50 0.075283 2022-Mar-16 00:00 *m 316.75345 -8.76538 0.00793281529432 848.567 2732.71 0.064935
2022 EO4 JPL/Horizons solution 3, # obs: 60 (3 days) 2022 March 12 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig 2022-Mar-12 00:00 *m 167.72507 -29.31645 0.01787641123273 2.501 3009.00 0.065128 2022-Mar-13 00:00 *m 178.91964 -47.94730 0.01024483022267 17.688 2353.15 0.037535 2022-Mar-14 00:00 *m 296.30323 -62.15974 0.00729641726508 95.628 821.63 0.026757 2022-Mar-15 00:00 *m 327.75211 -24.33518 0.01282219822766 59.845 2725.44 0.046676 2022-Mar-16 00:00 *m 332.73074 -11.32076 0.02094527060026 36.891 3087.94 0.076134 JPL/Horizons solution 2, # obs: 57 (1 days) 2022 March 10 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig 2022-Mar-12 00:00 *m 167.72512 -29.31672 0.01787592065318 83.097 3290.70 0.072755 2022-Mar-13 00:00 *m 178.92063 -47.94883 0.01024430212494 531.531 2387.08 0.055167 2022-Mar-14 00:00 *m 296.31200 -62.15590 0.00729639296247 1796.633 7910.66 0.026894 2022-Mar-15 00:00 *m 327.75340 -24.33266 0.01282273920726 888.310 4257.68 0.072952 2022-Mar-16 00:00 *m 332.73138 -11.31942 0.02094603186352 471.707 3691.91 0.110946
Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: 1999 HF1 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2022-Mar-13 00:00 355.57793 30.37110 0.18552505367127 17. n.a. 33.4821 /T 97.4/ 73.3274 2022-Mar-15 00:00 355.56806 37.53736 0.18239983048356 17. n.a. 39.7752 /T 111.8/ 88.3661 2022-Mar-17 00:00 355.55046 44.69964 0.18230368371489 16. n.a. 46.1524 /L 122.1/ 97.8836 2022-Mar-19 00:00 355.53270 51.63550 0.18504512651614 15.365 n.a. 52.3470 /L 126.7/ 99.3174 2022-Mar-21 00:00 355.52377 58.16762 0.19033033012173 15.020 n.a. 58.1533 /L 125.4/ 91.2523 2022-Mar-23 00:00 355.53511 64.18407 0.19780722398633 14.785 n.a. 63.4410 /L 120.0/ 74.6248 2022-Mar-25 00:00 355.58261 69.63763 0.20711086916048 14.636 n.a. 68.1509 /L 112.8/ 52.8060 2022-Mar-27 00:00 355.69193 74.53149 0.21789763998766 14.550 n.a. 72.2782 /L 105.0/ 30.5046 2022-Mar-29 00:00 355.91454 78.90100 0.22986435285217 14.510 n.a. 75.8532 /L 97.0/ 12.4034 2022-Mar-31 00:00 356.38793 82.79767 0.24275480002734 14.504 n.a. 78.9246 /L 88.9/ 1.9821 2022-Apr-02 00:00 357.69570 86.27756 0.25635832931989 14.522 n.a. 81.5476 /L 80.9/ 0.6489 2022-Apr-04 00:00 11.41770 89.37834 0.27050455751467 14.557 n.a. 83.7770 /L 73.4/ 7.6537 2022-Apr-06 00:00 170.52479 87.77654 0.28505686999093 14.605 n.a. 85.6637 /T 66.9/ 20.9223 2022-Apr-08 00:00 173.00442 85.23155 0.29990609884412 14.661 n.a. 87.2530 /T 62.3/ 38.0883 2022-Apr-10 00:00 173.77656 82.90930 0.31496498089178 14.723 n.a. 88.5843 /T 60.7/ 56.9649 2022-Apr-12 00:00 174.20525 80.77882 0.33016358466434 14.789 n.a. 89.6916 /T 63.0/ 75.3497 2022-Apr-14 00:00 174.51740 78.81244 0.34544569925257 14.857 n.a. 90.6040 /T 69.9/ 90.5286 2022-Apr-16 00:00 174.78298 76.98661 0.36076607054422 14.927 n.a. 91.3460 /T 81.1/ 99.1175 2022-Apr-18 00:00 175.03063 75.28128 0.37608825947048 14.997 n.a. 91.9389 /T 95.1/ 98.0258 2022-Apr-20 00:00 175.27445 73.67938 0.39138279346436 15.066 n.a. 92.4007 /T 109.4/ 86.4511 2022-Apr-22 00:00 175.52257 72.16641 0.40662537762417 15.136 n.a. 92.7471 /T 121.0/ 66.9947 2022-Apr-24 00:00 175.78020 70.73004 0.42179526923075 15.204 n.a. 92.9918 /T 126.2/ 44.4500 2022-Apr-26 00:00 176.05092 69.35992 0.43687407559343 15.271 n.a. 93.1464 /T 123.2/ 23.6877 2022-Apr-28 00:00 176.33719 68.04732 0.45184502693664 15.337 n.a. 93.2212 /T 113.6/ 8.4115 2022-Apr-30 00:00 176.64060 66.78498 0.46669258970997 15.401 n.a. 93.2250 /T 100.3/ 0.7652 2022-May-02 00:00 176.96204 65.56679 0.48140228974120 15.463 n.a. 93.1654 /T 85.7/ 1.2829 2022-May-04 00:00 177.30174 64.38760 0.49596065020071 15.524 n.a. 93.0490 /T 71.5/ 9.1549 2022-May-06 00:00 177.65950 63.24305 0.51035515723124 15.584 n.a. 92.8815 /T 59.0/ 22.7921 2022-May-08 00:00 178.03478 62.12940 0.52457420193191 15.641 n.a. 92.6678 /T 50.2/ 40.3480 2022-May-10 00:00 178.42687 61.04338 0.53860701545116 15.697 n.a. 92.4122 /T 48.0/ 59.8307 2022-May-12 00:00 178.83494 59.98215 0.55244366391233 15.750 n.a. 92.1186 /T 54.5/ 78.7322 2022-May-14 00:00 179.25812 58.94317 0.56607516059260 15.802 n.a. 91.7903 /T 68.5/ 93.5225 2022-May-16 00:00 179.69557 57.92412 0.57949363824060 15.853 n.a. 91.4301 /T 87.0/ 99.9547 2022-May-18 00:00 180.14662 56.92284 0.59269230310345 15.901 n.a. 91.0408 /T 107.1/ 95.1235 2022-May-20 00:00 180.61074 55.93733 0.60566486128826 15.948 n.a. 90.6249 /T 124.8/ 79.9353 2022-May-22 00:00 181.08766 54.96578 0.61840462050413 15.993 n.a. 90.1847 /T 135.3/ 58.8148 2022-May-24 00:00 181.57726 54.00658 0.63090390500436 16.036 n.a. 89.7225 /T 134.3/ 36.9658 2022-May-26 00:00 182.07955 53.05834 0.64315402651858 16.078 n.a. 89.2405 /T 123.5/ 18.4194 2022-May-28 00:00 182.59448 52.11991 0.65514554235678 16.118 n.a. 88.7406 /T 108.1/ 5.7291 2022-May-30 00:00 183.12189 51.19032 0.66686854377392 16.156 n.a. 88.2243 /T 91.1/ 0.2201
2022 ER5 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2022-Mar-14 00:00 138.68427 -10.35409 0.04414246502843 20.381 n.a. 142.5941 /T 36.8/ 81.3687 2022-Mar-15 00:00 138.55939 -9.03660 0.03712025055536 20.012 n.a. 142.1282 /T 30.2/ 88.3661 2022-Mar-16 00:00 138.40653 -7.10001 0.03013474076134 19.567 n.a. 141.6725 /T 27.4/ 93.9852 2022-Mar-17 00:00 138.19436 -3.99676 0.02320994499381 19.009 n.a. 141.1652 /T 30.1/ 97.8836 2022-Mar-18 00:00 137.83956 1.71024 0.01641375314249 18.277 n.a. 140.2619 /T 38.2/ 99.7435 * 2022-Mar-19 00:00 137.02530 15.04894 0.01000272186538 17.298 n.a. 136.5930 /T 52.4/ 99.3174 2022-Mar-20 00:00 132.49844 58.19007 0.00553044560277 16.739 n.a. 111.3386 /T 83.4/ 96.4772 * 2022-Mar-21 00:00 323.81434 60.18896 0.00781418026175 19.447 n.a. 66.3154 /L 110.3/ 91.2523 2022-Mar-22 00:00 320.74846 39.73606 0.01383522185696 22. n.a. 53.7843 /L 104.0/ 83.8460 2022-Mar-23 00:00 320.08559 32.07228 0.02053275576618 23. n.a. 50.3807 /L 92.8/ 74.6248 2022-Mar-24 00:00 319.81656 28.20438 0.02741618011850 23. n.a. 49.2492 /L 81.3/ 64.0847
2022 DP3 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2022-Mar-09 00:00 236.31999 64.69547 0.04222316015391 20.294 n.a. 103.8202 /L 93.9/ 36.5735 2022-Mar-10 00:00 240.40267 64.27412 0.03616024086197 20.015 n.a. 102.2946 /L 90.9/ 45.9103 2022-Mar-11 00:00 245.85602 63.49446 0.03013780016961 19.697 n.a. 100.1967 /L 89.1/ 55.3242 2022-Mar-12 00:00 253.37085 61.96563 0.02419354304891 19.338 n.a. 97.1049 /L 89.0/ 64.5516 2022-Mar-13 00:00 263.95069 58.69247 0.01841231903330 18.942 n.a. 92.0910 /L 92.0/ 73.3274 2022-Mar-14 00:00 278.65600 50.84688 0.01302469079410 18.592 n.a. 82.8283 /L 101.2/ 81.3687 * 2022-Mar-15 00:00 297.33593 30.45143 0.00880255050965 18.822 n.a. 63.7031 /L 124.4/ 88.3661 2022-Mar-16 00:00 317.00406 -8.59624 0.00792325871664 21. n.a. 39.1505 /L 163.6/ 93.9852 2022-Mar-17 00:00 333.72768 -37.52923 0.01120978405516 21. n.a. 41.8062 /L 153.2/ 97.8836 2022-Mar-18 00:00 346.11964 -49.83775 0.01631377854620 21. n.a. 49.7637 /L 136.0/ 99.7435
2022 EO4 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2022-Mar-10 00:00 163.11035 -18.23291 0.03517953010261 19.288 n.a. 156.4896 /T 97.5/ 45.9103 2022-Mar-11 00:00 164.53587 -21.96572 0.02638562711296 18.742 n.a. 153.4221 /T 90.0/ 55.3242 2022-Mar-12 00:00 167.60914 -29.27101 0.01785110637725 18.064 n.a. 147.0332 /T 86.2/ 64.5516 2022-Mar-13 00:00 178.68266 -47.93981 0.01021266108921 17.346 n.a. 128.7979 /L 94.8/ 73.3274 2022-Mar-14 00:00 296.82905 -62.17967 0.00726700281930 18.684 n.a. 72.9149 /L 141.6/ 81.3687 * 2022-Mar-15 00:00 327.92385 -24.23009 0.01281382528098 24. n.a. 34.0576 /L 171.0/ 88.3661 2022-Mar-16 00:00 332.82785 -11.25149 0.02094485367730 26. n.a. 24.6216 /L 173.9/ 93.9852 2022-Mar-17 00:00 334.78394 -5.64675 0.02961244748514 28. n.a. 22.2408 /L 169.0/ 97.8836

Setups



Due to the primary's rotation period and diameter,  we 
are expecting a bandwidth of about 160 Hz.  For the secondary, we are expecting a bandwidth of
of roughly 6 Hz.

The standard 10 and 11 usec setups below will put about 13 Doppler bins
on the asteroid.  

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              64
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             128 
ncoh              1
bandwidth      3921.6 Hz   
resolution       30.6  Hz
TXOFF          +500 Hz 
Time delay extent: 38250 meters
The primary of 1999 HF1 is large enough that 1 usec would
be imaging. The SNRs probably won't be strong enough.
---------------------------------------------------------------------


Instructions

NOTE: Data should be moved to the appropriate subdirectories in aardvark:/export/data0/a137170/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

1999 HF1 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/1999HF1/1999HF1.2022.planning.html

Asteroid Radar Astronomy
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