1620 Geographos (1951 RA)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3355121545 ± 2.00e+00
Semi-major axis (a)1.2457769668 AU ± 3.00e+00
Inclination (i)13.33577542° ± 4.00e+00
Long. of Asc. Node (Ω)337.14082621° ± 5.00e+00
Arg. of Perihelion (ω)277.01835526° ± 6.00e+00
Mean Anomaly (M)212.92032873° ± 2.36e-05
Mean Motion (n)0.7088458984°/day ± 2.56e+00
Perihelion dist (q)0.82780365 AU ± 3.19e+00
Aphelion dist (Q)1.66375028 AU ± 4.72e+00
Orbital Period1.39046623 yr ± 5.02e+00
NGA Modelr2
A23.55475120e-06 AU/d²
Physical Parameters
H (abs. magnitude)15.26
G (slope)0.15
Alternative Designations

1983 CY3

Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.276″
Uncertainty0
Orbit TypeApollo
MOID0.028806 AU
Observations Used9056
Radar Obs Used5
Gaia Obs Used104
Oppositions19
Arc Total1951-2017
First Observation Used1951-08-31
Last Observation Used2026-04-08
Observations (11927)
Date Type RA Dec Mag Band Observatory
1983-02-28 15:49:00 A 10 48 30.47 +02 09 00.5 323
1983-02-28 16:08:30 A 10 48 26.13 +02 07 54.3 323
1983-02-28 16:23:00 A 10 48 23.04 +02 07 06.2 323
1983-02-28 16:33:29 A 10 48 20.72 +02 06 31.9 323
1983-03-01 14:05:59 A 10 43 50.28 +00 52 06.5 323
1983-03-01 14:24:00 A 10 43 46.07 +00 51 00.6 323
1983-03-02 21:46:56 A 10 36 31.75 -01 08 34.7 022
1983-03-02 21:59:55 A 10 36 28.39 -01 09 26.4 022
1983-03-03 16:03:59 A 10 31 55.91 -02 21 43.2 323
1983-03-03 16:16:00 A 10 31 52.59 -02 22 32.2 323
1983-03-03 21:25:30 A 10 30 33.88 -02 45 45.7 552
1983-03-03 21:35:29 A 10 30 30.94 -02 46 27.3 552
1983-03-03 21:45:30 A 10 30 28.18 -02 47 09.7 552
1983-03-03 21:55:29 A 10 30 25.44 -02 47 52.3 552
1983-03-03 22:05:30 A 10 30 22.69 -02 48 35.4 552
1983-03-03 22:15:29 A 10 30 19.87 -02 49 17.7 552
1983-03-03 22:25:29 A 10 30 17.23 -02 50 00.6 552
1983-03-03 22:35:30 A 10 30 14.34 -02 50 43.0 552
1983-03-03 22:45:29 A 10 30 11.68 -02 51 25.5 552
1983-03-03 22:55:30 A 10 30 08.74 -02 52 08.3 552
1983-03-04 21:42:00 A 10 23 55.63 -04 33 10.2 552
1983-03-04 21:51:59 A 10 23 52.68 -04 33 55.3 552
1983-03-04 22:02:00 A 10 23 49.64 -04 34 41.6 552
1983-03-04 22:11:59 A 10 23 46.57 -04 35 28.2 552
1983-03-05 09:05:57 A 10 20 39.07 -05 24 34.5 474
1983-03-05 09:19:58 A 10 20 34.75 -05 25 41.7 474
1983-03-05 10:10:18 A 10 20 19.21 -05 29 42.1 474
1983-03-05 10:15:35 A 10 20 17.55 -05 30 06.9 474
1983-03-05 21:09:01 A 10 17 00.31 -06 24 33.2 026
1983-03-05 21:20:00 A 10 16 56.77 -06 25 29.1 026
1983-03-06 12:32:02 A 10 12 07.46 -07 39 54.9 474
1983-03-06 12:41:42 A 10 12 04.12 -07 40 44.6 474
1983-03-06 13:09:57 A 10 11 58.17 -07 44 44.8 C 330
1983-03-06 13:29:57 A 10 11 51.40 -07 46 27.3 C 330
1983-03-06 13:47:27 A 10 11 45.29 -07 47 59.1 C 330
1983-03-06 22:04:37 A 10 09 00.76 -08 31 14.5 022
1983-03-06 22:35:32 A 10 08 49.93 -08 33 56.5 022
1983-03-07 21:40:30 A 10 00 50.33 -10 39 04.2 026
1983-03-07 21:54:30 A 10 00 44.91 -10 40 27.1 026
1983-03-07 22:26:37 A 10 00 32.86 -10 43 22.1 022
1983-03-07 22:55:32 A 10 00 21.97 -10 46 02.5 022
1983-03-08 14:57:59 A 09 54 25.30 -12 15 50.2 323
1983-03-08 21:53:29 A 09 51 45.55 -12 57 58.6 026
1983-03-08 22:07:29 A 09 51 39.80 -12 59 21.6 026
1983-03-10 21:37:29 A 09 31 41.17 -17 51 54.8 026
1983-03-10 21:50:30 A 09 31 35.03 -17 53 18.9 026
1983-03-11 10:14:11 A 09 25 52.80 -19 11 06.7 474
1983-03-11 10:27:40 A 09 25 45.95 -19 12 37.5 474
1983-03-11 11:51:07 A 09 25 06.52 -19 21 53.3 415
1983-03-11 13:10:30 A 09 24 27.08 -19 30 28.0 415
Radar Observations (12)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1983-02-27 05:00:00 161795 5 Hz 2380 -1 -1
1983-02-27.208333 16179500 500 Hz 2380 251 251
1983-02-28 05:04:00 142007628 30 us 2380 -1 -1
1983-02-28.211111 14200762800 30000 us 2380 251 251
1994-08-28 07:10:00 38936537.06 1.76 us 8510 -14 -14
1994-08-28 07:10:00 -364880.593 0.9 Hz 8510 -14 -14
1994-08-28.298611 3893653706 1760 us 8510 253 253
1994-08-29 04:40:00 42596456.4 1.13 us 8510 -14 -14
1994-08-29 04:40:00 -427851.027 0.2 Hz 8510 -14 -14
1994-08-29.194444 4259645640 1130 us 8510 253 253
1994-09-02 07:20:00 -615553.2 0.5 Hz 8510 -14 -14
1994-09-02.305556 -61555320 50 Hz 8510 253 253
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)