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
1998-03-11 19:24:09 C 04 18 28.09 +32 40 38.5 z 118
1998-03-11 19:40:20 C 04 18 29.54 +32 40 35.6 z 118
2000-10-02 10:18:57 C 07 50 57.20 +35 10 51.6 c 699
2000-10-02 10:29:02 C 07 50 58.19 +35 10 50.6 c 699
2000-10-02 10:39:07 C 07 50 59.05 +35 10 50.3 c 699
2000-10-02 10:49:12 C 07 51 00.00 +35 10 50.3 c 699
2000-11-06 09:39:30 C 09 01 45.95 +34 40 04.1 18.2 c 704
2000-11-06 09:59:55 C 09 01 47.32 +34 40 03.2 18.8 c 704
2000-11-06 10:19:51 C 09 01 48.78 +34 40 02.9 19.3 c 704
2000-11-26 08:49:52 C 09 32 02.09 +34 55 05.2 c 699
2000-11-26 09:23:46 C 09 32 03.75 +34 55 09.1 c 699
2000-11-26 09:57:38 C 09 32 05.44 +34 55 12.7 c 699
2000-11-26 10:31:32 C 09 32 07.17 +34 55 15.8 c 699
2000-12-01 10:28:28 C 09 37 53.94 +35 08 18.5 c 704
2000-12-01 10:53:16 C 09 37 55.01 +35 08 21.6 c 704
2000-12-01 11:14:05 C 09 37 55.85 +35 08 24.5 c 704
2000-12-01 11:34:54 C 09 37 56.74 +35 08 27.1 c 704
2000-12-01 11:55:55 C 09 37 57.63 +35 08 29.4 c 704
2000-12-05 10:09:08 C 09 41 51.01 +35 22 08.8 c 704
2000-12-05 10:31:13 C 09 41 51.67 +35 22 12.3 c 704
2000-12-05 10:56:10 C 09 41 52.53 +35 22 16.7 c 704
2000-12-05 11:18:23 C 09 41 53.29 +35 22 20.9 c 704
2000-12-05 11:41:11 C 09 41 54.13 +35 22 24.9 c 704
2000-12-06 09:11:25 C 09 42 42.38 +35 25 57.3 c 704
2000-12-06 09:33:16 C 09 42 43.12 +35 26 01.1 c 704
2000-12-06 09:55:44 C 09 42 43.81 +35 26 05.8 c 704
2000-12-06 10:17:36 C 09 42 44.56 +35 26 09.8 c 704
2000-12-06 10:39:29 C 09 42 45.28 +35 26 12.0 c 704
2000-12-17 09:26:21 C 09 49 23.75 +36 24 34.2 c 704
2000-12-17 09:48:50 C 09 49 23.99 +36 24 41.3 c 704
2000-12-17 10:11:57 C 09 49 24.24 +36 24 48.1 c 704
2000-12-17 10:20:13 C 09 49 24.42 +36 24 49.5 670
2000-12-17 10:34:40 C 09 49 24.42 +36 24 54.9 c 704
2000-12-17 12:06:28 C 09 49 25.40 +36 25 19.8 670
2000-12-20 11:19:16 C 09 50 02.955 +36 46 07.82 l 689
2000-12-23 11:07:37 C 09 50 04.641 +37 09 13.74 l 689
2000-12-23 22:41:58 C 09 50 02.08 +37 13 04.6 610
2000-12-23 22:46:57 C 09 50 02.03 +37 13 06.5 610
2000-12-23 22:51:56 C 09 50 01.99 +37 13 08.4 610
2000-12-23 22:56:55 C 09 50 01.94 +37 13 10.2 610
2000-12-23 23:01:54 C 09 50 01.89 +37 13 12.1 610
2000-12-24 11:03:41 C 09 49 56.547 +37 17 23.56 l 689
2000-12-24 16:45:18 C 09 49 54.43 +37 19 21.0 903
2000-12-24 16:51:09 C 09 49 54.37 +37 19 23.6 903
2000-12-24 16:56:55 C 09 49 54.32 +37 19 25.2 903
2000-12-27 10:51:09 C 09 49 04.325 +37 43 08.57 l 689
2000-12-31 10:33:13 C 09 46 44.276 +38 20 03.99 l 689
2000-12-31 21:51:33 C 09 46 22.89 +38 24 29.2 610
2000-12-31 21:56:32 C 09 46 22.71 +38 24 31.3 610
2000-12-31 22:01:32 C 09 46 22.54 +38 24 33.4 610
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)