Goldstone Radar Observations Planning: 2017 TS3


Background


2017 TS3
2017 TS3 was discovered in October, 2017 by Pan-STARRS 1.  The absolute magnitude is 22.1,
suggesting a diameter of roughly 120 meters, but otherwise nothing is known about
its physical properties. 

This asteroid will approach within about 0.036 au on November 2.
Tracks are scheduled at Goldstone on November 1 and 2.
We are expecting SNRs strong enough for CW and ranging observations but probably
not detailed delay-Doppler imaging.

Orbital uncertainties for this asteroid are relatively large so we request optical astrometry.
The asteroid could be recovered as soon as the second or third week of September 
when the brightness reaches about magnitude 21, while solar elongations are favorable,
the solution 22 3-sigma pointing uncertainties are below 3000 arcsec, and before the Moon becomes full. 
By mid-October the 3-sigma pointing uncertainties will increase to ~7000 arcsec.


Orbital and Physical Characteristics  
Name                     2017 TS3
Asteroid number          not numbered
Discoverer               Pan-STARRS 1      
Discovery date           2017 Oct 10
Orbit type               Apollo
Close approach distance  0.036 +- 0.002 au  (OCC = 5)
Close approach distance  14.0 LD        
Close approach date      2021 Nov 2    

Semimajor axis           2.498 au       
Eccentricity             0.618          
Inclination              4.9 deg       
Orbital period           3.95 years     
Perihelion distance      0.954 au       
Aphelion distance        4.042 au
MOID                     0.026 au       

Absolute magnitude (H)   22.1
Diameter                ~0.12 km        
Optical albedo           unknown        
Rotation period          unknown        
Lightcurve amplitude     unknown        
Spectral class           unknown        
PHA?                     No             

Last update: 2021 August 31


Discovery M.P.E.C.


2017 TS3
https://www.minorplanetcenter.net/mpec/K17/K17T68.html


SNR Calculations

Goldstone SNRs
2017 TS3

2017 TS3:  D = 0.12 km,  P = 2.2 h,  OC albedo = 0.1
Solution 22
Note that the estimates below use P = 2.2 h.  

DOY      start date       window        RA, dec   dist   runs   SNR/day SNR/run
300-301 2021 Oct 27-28  21:51-14:10      6, +64  0.045    637      30      1
301-302 2021 Oct 28-29  21:25-16:16     14, +70  0.042    774      42      2
302-303 2021 Oct 29-30  20:27-17:31     30, +75  0.039   1100      60      2
303-304 2021 Oct 30-31  22:21-21:36     67, +79  0.037   1164      76      3
305     2021 Nov  1     01:29-23:37    113, +76  0.036   1202      86      3  Scheduled 1130-1300
306     2021 Nov  2     03:50-22:27    134, +69  0.036    884      78      3  Scheduled 0515-0645
307     2021 Nov  3     06:27-21:57    143, +61  0.037    745      67      3
308     2021 Nov  4     07:37-21:36    149, +53  0.038    650      54      2
309     2021 Nov  5     08:18-21:19    152, +46  0.041    571      41      2
310     2021 Nov  6     08:46-21:05    154, +39  0.044    505      30      1

Horizons were set at 20 deg except on two days when they were set at 25 deg
to make the asteroid appear to set. 

We could start early on both days if we're ready. 


Track Assignments


DOY    BOA   BOT   EOT   EOA
305    1000  1130  1300  1330  GSSR AST 2017 TS3
306    0345  0515  0645  0715  GSSR AST 2017 TS3


Goldstone tracks:
        UT        UT         PST                 Duration Round-trip     
DOY     Date      TX Window  TX Window           hh:mm    time (sec)   SNR/run 
305     Nov  1    1130-1300  0330-0500 Nov  1     1:30       26           3
306     Nov  2    0515-0645  2115-2345 Nov  1     1:30       36           3



Uncertainties

2017 TS3
JPL/Horizons solution 22, # obs: 76 (2017-2018)
2021 Aug 31, OCC = 5
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Sep-09 00:00 *m  353.33824  15.92639 0.36600747314724   2036.682      730.19     2653.85       1.124737
 2021-Sep-11 00:00 *m  353.23940  16.44195 0.34841208350916   2148.273      759.22     2759.37       1.181313
 2021-Sep-13 00:00 *m  353.12251  16.97009 0.33130278203733   2267.727      785.83     2856.06       1.239943
 2021-Sep-15 00:00 *m  352.98940  17.51309 0.31466580733608   2395.858      809.57     2942.33       1.300433
 2021-Sep-17 00:00 *m  352.84194  18.07358 0.29848566004468   2533.629      830.00     3016.61       1.362554
 2021-Sep-19 00:00 *   352.68210  18.65464 0.28274597751319   2682.190      846.63     3077.02       1.426046
 2021-Sep-21 00:00 *   352.51201  19.25985 0.26743021552765   2842.911      858.75     3121.11       1.490606
 2021-Sep-23 00:00 *   352.33412  19.89346 0.25252200026933   3017.451      865.48     3145.53       1.555874
 2021-Sep-25 00:00 *   352.15130  20.56058 0.23800514582030   3207.834      865.59     3145.95       1.621413
 2021-Sep-27 00:00 *   351.96694  21.26744 0.22386349631498   3416.565      857.59     3116.87       1.686694
 2021-Sep-29 00:00 *   351.78517  22.02178 0.21008081199875   3646.782      839.58     3051.43       1.751062
 2021-Oct-01 00:00 *   351.61097  22.83327 0.19664081847728   3902.470      809.19     2940.96       1.813716
 2021-Oct-03 00:00 *   351.45045  23.71419 0.18352739002637   4188.747      763.27     2774.08       1.873658
 2021-Oct-05 00:00 *m  351.31126  24.68026 0.17072474118034   4512.290      697.65     2535.57       1.929634
 2021-Oct-07 00:00 *m  351.20312  25.75198 0.15821753035791   4881.934      606.64     2204.81       1.980045
 2021-Oct-09 00:00 *m  351.13832  26.95642 0.14599106245022   5309.560      482.58     1753.93       2.022824
 2021-Oct-11 00:00 *m  351.13233  28.32959 0.13403219712011   5811.383      314.92     1144.57       2.055268
 2021-Oct-13 00:00 *m  351.20494  29.91986 0.12233148910944   6409.833       88.41      321.33       2.073783
 2021-Oct-15 00:00 *m  351.38292  31.79314 0.11088647198927   7136.352      220.08      799.86       2.073444
 2021-Oct-17 00:00 *m  351.70514  34.04110 0.09970596098802   8035.594      646.94     2351.26       2.047276
 2021-Oct-19 00:00 *   352.23267  36.79404 0.08881609116385   9171.533     1250.82     4546.03       1.985019
 2021-Oct-21 00:00 *   353.06999  40.24127 0.07826992492342  10635.437     2127.86     7733.61       1.871073
 2021-Oct-23 00:00 *   354.41484  44.66158 0.06816399364036  12552.547     3435.57    12486.43       1.681053
 2021-Oct-25 00:00 *   356.69473  50.46186 0.05866774638664  15071.629     5419.09    19695.43       1.376467
 2021-Oct-27 00:00 *     1.03103  58.18721 0.05007502823548  18278.824     8384.61    30473.49       0.898713
 2021-Oct-29 00:00 *    11.45380  68.26593 0.04288238724517  21876.222    12387.27    45020.96       0.172672
 2021-Oct-31 00:00 *    50.79061  78.45808 0.03785117817784  24490.161    16197.75    58869.97       0.844160
 2021-Nov-01 00:00 *    94.59995  78.50707 0.03643007316245  24640.723    17047.64    61958.88       1.434469
 2021-Nov-02 00:00 *   124.61657  73.04662 0.03586362451173  23671.199    16657.76    60541.87       2.034416
 2021-Nov-03 00:00 *   138.52194  65.39407 0.03618806808129  21628.264    15024.07    54604.28       2.598868
 2021-Nov-04 00:00 *m  145.67163  57.40594 0.03737661300840  18854.974    12565.03    45667.04       3.090190

Astrometry in the second or third week of September would be ideal before the plane-of-sky 
position uncertainties grow to large values.


Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: 2017 TS3 Solution 22 (OCC = 5) 2021 Aug 31 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2021-Sep-09 00:00 353.33348 15.93090 0.36599651189584 21.449 n.a. 158.0171 /L 155.8/ 5.0489 2021-Sep-11 00:00 353.23427 16.44665 0.34840241502269 21.306 n.a. 158.6628 /L 135.8/ 19.4359 2021-Sep-13 00:00 353.11698 16.97500 0.33129443877613 21.165 n.a. 159.1492 /L 110.5/ 40.3091 2021-Sep-15 00:00 352.98344 17.51821 0.31465882033668 21.025 n.a. 159.4587 /T 84.8/ 62.9279 2021-Sep-17 00:00 352.83553 18.07892 0.29848005881950 20.887 n.a. 159.5776 /T 59.9/ 82.5144 2021-Sep-19 00:00 352.67520 18.66020 0.28274178996543 20.751 n.a. 159.4975 /T 37.9/ 95.4289 2021-Sep-21 00:00 352.50459 19.26566 0.26742746785776 20.617 n.a. 159.2163 /T 25.3/ 99.8397 2021-Sep-23 00:00 352.32613 19.89952 0.25252071685327 20.485 n.a. 158.7381 /T 32.8/ 95.8587 2021-Sep-25 00:00 352.14268 20.56691 0.23800534906087 20.355 n.a. 158.0725 /T 50.9/ 85.0024 2021-Sep-27 00:00 351.95764 21.27405 0.22386520648912 20.224 n.a. 157.2336 /T 71.3/ 69.3338 2021-Sep-29 00:00 351.77513 22.02868 0.21008404712356 20.093 n.a. 156.2380 /T 92.1/ 50.9124 2021-Oct-01 00:00 351.60010 22.84049 0.19664559419955 19.960 n.a. 155.1032 /T 113.0/ 31.8368 2021-Oct-03 00:00 351.43867 23.72173 0.18353371952298 19.824 n.a. 153.8471 /T 133.1/ 14.7154 2021-Oct-05 00:00 351.29845 24.68815 0.17073263505801 19.684 n.a. 152.4862 /T 147.7/ 3.0327 2021-Oct-07 00:00 351.18914 25.76024 0.15822699656805 19.539 n.a. 151.0354 /T 144.9/ 0.4949 2021-Oct-09 00:00 351.12300 26.96507 0.14600210625869 19.387 n.a. 149.5071 /T 126.3/ 8.9290 2021-Oct-11 00:00 351.11544 28.33865 0.13404482109798 19.226 n.a. 147.9100 /T 103.4/ 26.4925 2021-Oct-13 00:00 351.18618 29.92935 0.12234569288464 19.054 n.a. 146.2474 /T 80.9/ 48.5234 2021-Oct-15 00:00 351.36187 31.80307 0.11090225116277 18.871 n.a. 144.5152 /T 61.0/ 69.9917 2021-Oct-17 00:00 351.68119 34.05145 0.09972330410899 18.673 n.a. 142.6970 /T 46.3/ 87.0398 2021-Oct-19 00:00 352.20495 36.80478 0.08883497257385 18.459 n.a. 140.7567 /T 40.7/ 97.2992 2021-Oct-21 00:00 353.03709 40.25227 0.07829028875842 18.228 n.a. 138.6235 /T 45.2/ 99.8139 2021-Oct-23 00:00 354.37439 44.67263 0.06818571852626 17.981 n.a. 136.1635 /T 55.4/ 94.8626 2021-Oct-25 00:00 356.64216 50.47262 0.05869056779753 17.725 n.a. 133.1291 /T 66.3/ 83.5882 2021-Oct-27 00:00 0.95619 58.19757 0.05009837246281 17.481 n.a. 129.0796 /T 74.8/ 67.5496 2021-Oct-29 00:00 11.32829 68.27870 0.04290505752431 17.293 n.a. 123.3281 /T 78.9/ 48.5180 2021-Oct-31 00:00 50.58334 78.49737 0.03787098094284 17.247 n.a. 115.1785 /L 78.3/ 28.7324 2021-Nov-02 00:00 124.68225 73.10795 0.03587763004631 17.437 n.a. 104.8754 /L 77.1/ 11.4821 2021-Nov-04 00:00 145.73425 57.46103 0.03738280582157 17.874 n.a. 94.4216 /L 83.3/ 1.2160

Setups


We don't know the rotation period, but if it's slower than 2.2 h, then 
the bandwidth could be ~5 Hz.

CW setup:
---------------------------------------------------------------------------
TX polarization           RCP
RCV polarization          LCP & RCP
Frequency hops:           no hopping
Bandwidth:               5000 Hz 
TXoffset                 +500 Hz
FFT                      5000 for 1.0 Hz resolution 

Ranging setups:
---------------------------------------------------------------------------
10-usec
baud             10 usec
code            127
PRP            1270 usec
ncoh              1 
bandwidth       787 Hz   
FFT             128
resolution       6.15 Hz
TXoffset       +100 Hz  (echo in column 80)
---------------------------------------------------------------------------
11-usec 
baud             11 usec
code            127
PRP            1397 usec
ncoh              1 
bandwidth       716 Hz   
FFT             128
resolution      5.6 Hz
TXoffset     +100 Hz  (echo in column 82) 
-------------------------------------------------------------------------
1-usec 
baud              1 usec
code            255
ncoh              8
bandwidth       490 Hz   
FFT             128
resolution        3.8 Hz
TXoffset        +50 Hz  (echo in column 77)
---------------------------------------------------------------------

Instructions

NOTE: Data should be moved to the appropriate subdirectories in aardvark:/export/data0/2017ts3/raw/

POINTING:

  OSOD and predicts are on aardvark:



POINTING  

...Not yet available...

Transmit offsets are given in millidegrees.  


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

2017 TS3 GOLDSTONE MASTERLOG

============================================================================== ----------------------------------------------------- ...Not yet available... -----------------------------------------------------
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 https://echo.jpl.nasa.gov/asteroids/2017TS3/2017TS3.2021.goldstone.planning.html

Asteroid Radar Astronomy
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