Goldstone Radar Observations Planning: 2018 EB
2018 EB The Minor Planet Center has classified 2018 EB as a "Potentially Hazardous Asteroid."
Orbital and Physical Characteristics
Name 2018 EB
Asteroid number not numbered
Discoverer NEOWISE
Discovery date 2018 April 4
orbit type Amor
Close approach dist. 0.0396 au
Close approach dist. 15.4 lunar distances
Close approach date 2018 Oct 7
semimajor axis 1.017 au
eccentricity 0.012
inclination 29.4 deg
Orbital period 1.026 years
perihelion distance 1.005 au
aphelion distance 1.029 au
Tisserand parameter 5.887 (asteroidal)
absolute magnitude (H) 21.8
diameter ~0.24 km (J. Masiero, pers. comm.)
optical albedo relatively dark?
rotation period 1.22 h (B. D. Warner, pers. comm.)
lightcurve amplitude low
pole direction unknown
spectral class unknown
PHA
Last update: 2018 October 9
2018 EB https://www.minorplanetcenter.net/mpec/K18/K18E26.html
Goldstone SNRs
2018 EB: D = 0.2 km, P = 1.22 h, OC albedo = 0.6
100 kW monostatic 180 kW w/GBT
wk DOY start date window RA, dec dist runs SNR/day SNR/run SNR/RTT
40 274 2018 Oct 01 05:51-20:42 95, +59 0.062 433 19 1
40 275 2018 Oct 02 06:14-20:08 94, +53 0.056 452 28 1 4
40 276 2018 Oct 03 06:35-19:34 93, +46 0.050 471 42 2 8 Scheduled at DSS-14 and GBT
40 277 2018 Oct 04 06:56-19:01 93, +38 0.045 484 60 3 12
40 278 2018 Oct 05 07:19-18:26 92, +27 0.042 483 80 4 17 Scheduled at DSS-14
40 279 2018 Oct 06 07:44-17:49 91, +15 0.040 459 92 5 21 Scheduled at DSS-14
41 280 2018 Oct 07 08:12-17:07 91, +3 0.040 406 86 5 21 Scheduled at DSS-14 and GBT
41 281 2018 Oct 08 08:47-16:21 90, -9 0.042 330 64 4 17 Scheduled at DSS-14 and GBT
41 282 2018 Oct 09 09:28-15:28 90, -20 0.045 241 38 3 12 Scheduled at DSS-14
41 283 2018 Oct 10 10:25-14:20 89, -29 0.050 142 18 2 8
Goldstone SNRs assume Ptx = 100 kW and Tsys = 17 K
GBT SNRs assume Ptx = 180 kW.
Arecibo SNRs
start date window RA, dec dist runs SNR/day SNR/run
2018 Oct 05 08:28-10:54 92, +29 0.042 104 1700 180 Scheduled
2018 Oct 06 08:11-10:55 91, +17 0.040 126 2300 210 Scheduled
2018 Oct 07 08:29-10:22 91, +4 0.040 87 1900 220 Scheduled
Arecibo SNRs assume Ptx = 400 kW and Tsys = 25 K.
Track Assignments
DOY BOA BOT EOT EOA
276 0715 0845 1215 1245 GSSR AST 2018 EB GBT GBT cancelled. Unfortunately, Goldstone observations were also cancelled.
278 0755 0925 1155 1225 GSSR AST 2018 EB
279 0745 0915 1340 1410 GSSR AST 2018 EB
280 0740 0910 1305 1335 GSSR AST 2018 EB GBT GBT cancelled
281 0740 0910 1600 1630 GSSR AST 2018 EB GBT GBT cancelled
282 0800 0930 1430 1500 GSSR AST 2018 EB
Goldstone tracks:
UT UT PDT Duration Round-trip Arecibo
DOY Date TX Window TX Window hh:mm time (sec) overlap GBT Schedule
276 Oct 3 0745-1215 0045-0515 4:30 50 None 0900-1215 Marina GBT cancelled: broken subreflector actuator
278 Oct 5 0825-1155 0125-0455 3:30 42 0828-1054 Lance
279 Oct 6 0815-1340 0115-0640 5:25 40 0815-1055 Shantanu
280 Oct 7 0815-1305 0115-0605 4:50 40 0829-1022 1000-1200 Shantanu GBT cancelled
281 Oct 8 0850-1600 0150-0900 7:10 42 None 0830-1230 Marina GBT cancelled
282 Oct 9 0930-1430 0230-0730 5:00 45 None Lance
Start times indicate when we can transmit, which on some days is only 30 minutes
after we get the telescope.
Elevations > 75 deg at Goldstone:
Oct 5 1159-1255
Arecibo tracks:
UT UT PDT Round-trip
Date TX Window TX Window time (sec)
Oct 5 0828-1054 0128-0354 PDT 42
Oct 6 0811-1055 0111-0355 PDT 40
Oct 7 0829-1022 0129-0322 PDT 40
Uncertainties
JPL/Horizons solution 26, # obs: 206 (214 days)
2018 October 2
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig
2018-Oct-01 00:00 * 94.96980 61.85341 0.06590445351232 0.856 0.75 2.74 0.000181
2018-Oct-02 00:00 * 94.21793 56.77668 0.05919721471264 0.948 0.82 2.96 0.000169
2018-Oct-03 00:00 * 93.51574 50.46224 0.05305504219783 1.043 0.88 3.21 0.000163
2018-Oct-04 00:00 * 92.85595 42.61452 0.04770547838885 1.132 0.94 3.40 0.000164
2018-Oct-05 00:00 * 92.23242 33.01375 0.04345004167907 1.197 0.93 3.40 0.000172
2018-Oct-06 00:00 * 91.63998 21.72071 0.04064014183694 1.218 0.82 3.00 0.000185
2018-Oct-07 00:00 *m 91.07433 9.30758 0.03958900573202 1.197 0.60 2.18 0.000196
2018-Oct-08 00:00 *m 90.53192 -3.16972 0.04043595298211 1.153 0.37 1.35 0.000201
2018-Oct-09 00:00 *m 90.00985 -14.62335 0.04306885830359 1.105 0.34 1.23 0.000199
2018-Oct-10 00:00 *m 89.50579 -24.41781 0.04718749852059 1.055 0.43 1.56 0.000192
2018-Oct-11 00:00 *m 89.01785 -32.44520 0.05243919163271 1.000 0.50 1.82 0.000183
2018-Oct-12 00:00 *m 88.54447 -38.90643 0.05851466796869 0.941 0.54 1.96 0.000176
JPL/Horizons solution 24, # obs: 195 (210 days)
2018 Sep 28
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig
2018-Oct-01 00:00 * 94.96994 61.85329 0.06590446750536 1.663 1.21 4.41 0.000188
2018-Oct-02 00:00 * 94.21808 56.77656 0.05919724266634 1.850 1.37 4.98 0.000188
2018-Oct-03 00:00 * 93.51588 50.46211 0.05305508621773 2.045 1.54 5.60 0.000204
2018-Oct-04 00:00 * 92.85609 42.61439 0.04770554050805 2.225 1.68 6.12 0.000236
2018-Oct-05 00:00 * 92.23256 33.01362 0.04345012310159 2.354 1.71 6.22 0.000279
2018-Oct-06 00:00 * 91.64013 21.72060 0.04064024168612 2.394 1.52 5.51 0.000325
2018-Oct-07 00:00 *m 91.07448 9.30751 0.03958911997999 2.343 1.07 3.87 0.000362
2018-Oct-08 00:00 *m 90.53207 -3.16975 0.04043607496371 2.248 0.54 1.95 0.000382
2018-Oct-09 00:00 *m 90.01001 -14.62335 0.04306898103235 2.151 0.39 1.43 0.000383
2018-Oct-10 00:00 *m 89.50595 -24.41777 0.04718761682593 2.055 0.60 2.19 0.000369
2018-Oct-11 00:00 *m 89.01801 -32.44515 0.05243930266186 1.951 0.74 2.69 0.000349
2018-Oct-12 00:00 *m 88.54463 -38.90637 0.05851477058712 1.841 0.79 2.88 0.000327
JPL/Horizons solution 23, # obs: 184 (122 days)
2018 August 9
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig
2018-Oct-01 00:00 94.99782 61.88499 0.06591209853275 18.408 11.00 39.98 0.001701
2018-Oct-02 00:00 94.24325 56.81268 0.05920139811173 20.251 13.16 47.82 0.002125
2018-Oct-03 00:00 93.53860 50.50296 0.05305488183005 22.052 15.47 56.22 0.002634
2018-Oct-04 00:00 92.87656 42.65963 0.04769993353538 23.497 17.42 63.31 0.003226
2018-Oct-05 00:00 92.25098 33.06157 0.04343806716002 24.117 17.95 65.24 0.003869
2018-Oct-06 00:00 91.65666 21.76768 0.04062105405474 23.537 15.70 57.05 0.004486
2018-Oct-07 00:00 91.08926 9.34880 0.03956297041030 22.029 10.23 37.18 0.004961
2018-Oct-08 00:00 90.54523 -3.13831 0.04040417196714 20.598 3.32 12.07 0.005202
2018-Oct-09 00:00 90.02167 -14.60291 0.04303313107946 19.857 2.78 10.12 0.005204
2018-Oct-10 00:00 89.51621 -24.40688 0.04714953309896 19.462 6.11 22.21 0.005038
2018-Oct-11 00:00 89.02697 -32.44135 0.05240022683896 18.954 7.42 26.98 0.004788
2018-Oct-12 00:00 88.55237 -38.90736 0.05847546405089 18.218 7.51 27.31 0.004515
Circumstances for optical observations:
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-O-T /r T-O-M/Illu%
2018-Sep-12 00:00 155.40742 87.70431 0.21551998334912 21.43 83.5020 /L 91.4/ 7.0
2018-Sep-13 00:00 146.36665 87.47963 0.20769318813392 21.35 83.8136 /L 96.7/ 13.7
2018-Sep-14 00:00 138.42914 87.17958 0.19981943691798 21.27 84.1351 /L 101.8/ 21.9
2018-Sep-15 00:00 131.64702 86.80634 0.19190279029677 21.19 84.4677 /L 106.4/ 31.0
2018-Sep-16 00:00 125.93219 86.36128 0.18394759685628 21.10 84.8122 /L 110.3/ 40.7
2018-Sep-17 00:00 121.13750 85.84389 0.17595855840568 21.01 85.1701 /L 113.3/ 50.4
2018-Sep-18 00:00 117.10756 85.25132 0.16794081628438 20.91 85.5429 /L 115.3/ 60.0
2018-Sep-19 00:00 113.70224 84.57816 0.15990006427594 20.81 85.9324 /L 116.1/ 69.0
2018-Sep-20 00:00 110.80397 83.81625 0.15184269682497 20.70 86.3411 /L 115.8/ 77.4
2018-Sep-21 00:00 108.31746 82.95439 0.14377600571475 20.58 86.7716 /L 114.1/ 84.7
2018-Sep-22 00:00 106.16664 81.97778 0.13570844476366 20.46 87.2276 /L 111.2/ 90.9
2018-Sep-23 00:00 104.29110 80.86726 0.12764999155773 20.32 87.7132 /L 107.0/ 95.6
2018-Sep-24 00:00 102.64275 79.59818 0.11961264956118 20.18 88.2339 /L 101.8/ 98.7
2018-Sep-25 00:00 101.18316 78.13874 0.11161115602393 20.03 88.7964 /L 95.5/ 99.9
2018-Sep-26 00:00 99.88135 76.44771 0.10366399557893 19.86 89.4093 /L 88.2/ 99.0 NEOWISE?
2018-Sep-27 00:00 98.71216 74.47118 0.09579487371548 19.68 90.0834 /L 80.2/ 96.1 NEOWISE?
2018-Sep-28 00:00 97.65494 72.13805 0.08803488984305 19.49 90.8325 /L 71.6/ 91.2 NEOWISE?
2018-Sep-29 00:00 96.69260 69.35379 0.08042578219812 19.28 91.6740 /L 62.4/ 84.3
2018-Sep-30 00:00 95.81089 65.99214 0.07302481167423 19.05 92.6290 /L 53.0/ 75.6
2018-Oct-01 00:00 94.99782 61.88499 0.06591209853282 18.80 93.7222 /L 43.8/ 65.6
2018-Oct-02 00:00 94.24325 56.81268 0.05920139811181 18.53 94.9780 /L 36.0/ 54.7
2018-Oct-03 00:00 93.53860 50.50296 0.05305488183013 18.26 96.4105 /L 31.9/ 43.4
2018-Oct-04 00:00 92.87656 42.65963 0.04769993353547 17.98 97.9995 /L 34.8/ 32.2
2018-Oct-05 00:00 92.25098 33.06157 0.04343806716012 17.73 99.6489 /L 44.6/ 21.9
2018-Oct-06 00:00 91.65666 21.76768 0.04062105405485 17.54 101.1437 /L 59.0/ 13.1
2018-Oct-07 00:00 91.08926 9.34880 0.03956297041041 17.45 102.1822 /L 75.1/ 6.3
2018-Oct-08 00:00 90.54523 -3.13831 0.04040417196724 17.48 102.5421 /L 90.7/ 1.9
2018-Oct-09 00:00 90.02167 -14.60291 0.04303313107956 17.62 102.2448 /L 103.6/ 0.2
2018-Oct-10 00:00 89.51621 -24.40688 0.04714953309903 17.84 101.5086 /L 112.4/ 1.1
2018-Oct-11 00:00 89.02697 -32.44135 0.05240022683902 18.09 100.5726 /L 116.8/ 4.4
2018-Oct-12 00:00 88.55237 -38.90736 0.05847546405094 18.35 99.5974 /L 117.4/ 9.7
2018-Oct-13 00:00 88.09112 -44.09973 0.06513902525775 18.60 98.6628 /L 115.3/ 16.7
2018-Oct-14 00:00 87.64212 -48.29646 0.07222161808450 18.84 97.7991 /L 111.6/ 24.8
2018-Oct-15 00:00 87.20440 -51.72421 0.07960430958782 19.07 97.0116 /L 107.2/ 33.7
Setups
Due to its diameter and rapid rotation period, we are expecting a bandwidth
of about 17 Hz.
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 +100Hz (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 512
ncoh 16
bandwidth 245 Hz
resolution 0.48 Hz
TXOFF +50 Hz
---------------------------------------------------------------------
Instructions
NOTE: Data should be moved to the appropriate subdirectories in
aardvark:/export/data0/2018eb/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
2018 EB 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/2018EB/2018EB_planning.oct2018.html
Asteroid Radar Astronomy