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
1994-09-22 19:21:06 C 21 36 58.89 +10 15 14.3 z 970
1994-09-22 20:09:35 C 21 36 59.92 +10 15 44.9 z 970
1994-09-22 20:20:59 C 21 37 00.13 +10 15 51.9 z 970
1994-09-23 21:36:01 C 21 37 42.47 +10 30 44.4 482
1994-09-23 21:44:21 C 21 37 42.58 +10 30 52.9 482
1994-09-27 08:46:30 C 21 40 13.14 +11 11 20.6 c 608
1994-09-27 09:51:29 C 21 40 14.58 +11 11 45.4 c 608
1994-09-29 20:05:20 C 21 42 11.52 +11 33 03.9 046
1994-09-29 20:14:29 C 21 42 11.78 +11 33 06.9 046
1994-09-29 20:20:54 C 21 42 11.96 +11 33 09.1 046
1994-09-30 19:53:02 C 21 43 01.18 +11 40 38.6 046
1994-09-30 19:54:22 C 21 43 01.25 +11 40 39.1 046
1994-09-30 20:02:43 C 21 43 01.45 +11 40 41.4 046
1994-09-30 21:02:46 C 21 43 03.27 +11 40 59.0 113
1994-09-30 21:05:23 C 21 43 03.32 +11 40 59.9 113
1994-09-30 21:11:40 C 21 43 03.52 +11 41 02.0 113
1994-10-02 21:25:04 C 21 44 48.20 +11 54 30.4 046
1994-10-02 21:28:07 C 21 44 48.30 +11 54 31.1 046
1994-10-02 21:31:14 C 21 44 48.40 +11 54 31.9 046
1994-10-03 05:51:59 C 21 45 07.32 +11 56 38.4 z 658
1994-10-03 05:54:29 C 21 45 07.41 +11 56 39.0 z 658
1994-10-03 05:57:31 C 21 45 07.50 +11 56 39.8 z 658
1994-10-03 19:42:21 C 21 45 39.43 +11 59 58.0 482
1994-10-04 01:24:04 C 21 45 50.92 +12 01 16.1 606
1994-10-04 06:22:01 C 21 46 03.08 +12 02 29.6 z 658
1994-10-04 06:24:31 C 21 46 03.15 +12 02 30.2 z 658
1994-10-04 06:27:31 C 21 46 03.26 +12 02 30.9 z 658
1994-10-04 18:00:11 21 46 30.76 +12 05 08.2 m 095
1994-10-04 18:25:11 21 46 31.54 +12 05 13.9 m 095
1994-10-04 18:54:29 C 21 46 33.27 +12 05 17.1 z 970
1994-10-04 19:05:51 C 21 46 33.65 +12 05 19.7 z 970
1994-10-04 19:11:51 C 21 46 33.85 +12 05 21.0 z 970
1994-10-04 19:22:16 C 21 46 34.22 +12 05 23.6 z 970
1994-10-04 19:30:45 C 21 46 34.50 +12 05 25.4 z 970
1994-10-05 22:44:56 C 21 47 38.09 +12 11 07.2 606
1994-10-07 00:20:09 C 21 48 41.57 +12 16 07.5 z 801
1994-10-07 00:43:05 C 21 48 42.39 +12 16 11.9 z 801
1994-10-07 21:17:26 C 21 49 33.34 +12 19 48.3 482
1994-10-07 21:26:47 C 21 49 33.78 +12 19 49.6 482
1994-10-07 21:36:11 C 21 49 34.05 +12 19 51.3 482
1994-10-08 00:56:56 C 21 49 42.84 +12 20 30.7 z 801
1994-10-08 23:03:32 C 21 50 38.24 +12 24 07.7 z 540
1994-10-08 23:09:16 C 21 50 38.44 +12 24 08.2 z 540
1994-10-08 23:13:37 C 21 50 38.63 +12 24 09.0 z 540
1994-10-09 19:16:25 21 51 31.26 +12 27 18.7 m 095
1994-10-09 19:30:25 21 51 31.93 +12 27 22.2 m 095
1994-10-10 21:37:41 C 21 52 41.37 +12 31 05.9 482
1994-10-11 09:23:41 C 21 53 12.45 +12 32 57.7 c 608
1994-10-11 10:10:13 C 21 53 14.32 +12 33 03.4 c 608
1994-10-11 10:34:32 C 21 53 15.31 +12 33 06.3 c 608
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)