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
2001-10-27 04:45:11 C 23 44 26.01 +30 57 49.9 15.7 c 704
2001-10-27 04:48:26 C 23 44 25.945 +30 57 46.75 g 689
2001-10-27 05:08:45 C 23 44 24.95 +30 57 33.7 16.3 c 704
2001-10-27 05:32:20 C 23 44 23.87 +30 57 17.7 16.7 c 704
2001-10-27 18:50:24 C 23 43 53.21 +30 48 16.6 056
2001-10-27 19:11:56 C 23 43 52.31 +30 48 01.7 056
2001-10-28 02:25:35 C 23 43 35.96 +30 43 14.5 450
2001-10-28 02:59:17 C 23 43 34.57 +30 42 52.5 450
2001-10-30 03:36:53 C 23 41 58.64 +30 10 44.4 15.9 c 644
2001-10-30 03:51:52 C 23 41 58.15 +30 10 34.9 16.7 c 644
2001-10-30 04:06:53 C 23 41 57.64 +30 10 25.2 16.9 c 644
2001-10-30 18:45:39 C 23 41 33.04 +30 00 50.7 151
2001-10-30 18:48:43 C 23 41 32.97 +30 00 48.7 151
2001-10-30 18:52:01 C 23 41 32.84 +30 00 46.7 151
2001-10-30 18:54:43 C 23 41 32.76 +30 00 45.0 151
2001-11-01 19:00:54 C 23 40 24.46 +29 30 10.4 d 151
2001-11-01 19:04:30 C 23 40 24.36 +29 30 08.2 d 151
2001-11-01 19:08:34 C 23 40 24.26 +29 30 05.7 d 151
2001-11-01 19:11:38 C 23 40 24.22 +29 30 04.0 d 151
2001-11-02 23:30:53 C 23 39 52.23 +29 12 31.2 c 198
2001-11-02 23:35:06 C 23 39 52.15 +29 12 28.5 c 198
2001-11-02 23:45:34 C 23 39 51.95 +29 12 21.8 c 198
2001-11-03 18:47:53 C 23 39 35.27 +29 00 47.7 o 084
2001-11-04 02:35:06 C 23 39 29.11 +28 56 12.7 d 739
2001-11-04 02:41:06 C 23 39 29.01 +28 56 09.3 d 739
2001-11-04 02:47:05 C 23 39 28.92 +28 56 05.4 d 739
2001-11-04 17:52:26 C 23 39 18.32 +28 47 04.5 056
2001-11-10 03:48:57 C 23 38 52.642 +27 34 54.41 g 689
2001-11-10 17:50:13 C 23 38 56.79 +27 27 35.1 056
2001-11-10 18:12:22 C 23 38 56.89 +27 27 24.3 056
2001-11-11 03:44:05 C 23 39 00.244 +27 22 37.63 g 689
2001-11-11 17:25:59 C 23 39 06.43 +27 15 41.5 056
2001-11-11 17:47:19 C 23 39 06.62 +27 15 31.2 056
2001-11-12 03:32:37 C 23 39 11.29 +27 10 45.3 c 704
2001-11-12 03:41:05 C 23 39 11.414 +27 10 40.73 g 689
2001-11-12 03:53:19 C 23 39 11.41 +27 10 34.8 c 704
2001-11-12 04:14:01 C 23 39 11.52 +27 10 24.2 c 704
2001-11-12 04:34:45 C 23 39 11.63 +27 10 13.6 c 704
2001-11-12 04:55:29 C 23 39 11.77 +27 10 03.0 c 704
2001-11-13 03:36:39 C 23 39 26.072 +26 59 04.14 g 689
2001-11-14 03:33:33 C 23 39 44.065 +26 47 47.50 g 689
2001-11-15 03:29:26 C 23 40 05.303 +26 36 51.37 g 689
2001-11-16 03:26:26 C 23 40 29.727 +26 26 16.00 g 689
2001-11-16 18:44:55 C 23 40 47.06 +26 19 38.4 151
2001-11-16 18:48:23 C 23 40 47.13 +26 19 37.1 151
2001-11-16 18:52:43 C 23 40 47.17 +26 19 35.1 151
2001-11-16 18:55:45 C 23 40 47.25 +26 19 34.0 151
2001-11-16 18:58:33 C 23 40 47.32 +26 19 33.1 151
2001-11-16 19:01:56 C 23 40 47.35 +26 19 31.5 151
2001-11-17 03:23:10 C 23 40 57.243 +26 16 01.24 g 689
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)