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
2008-03-19 01:15:31 C 07 18 22.87 -11 29 38.1 d H78
2008-03-19 01:16:34 C 07 18 22.47 -11 29 41.5 d H78
2008-03-19 01:17:36 C 07 18 21.90 -11 29 44.6 d H78
2008-03-19 01:18:38 C 07 18 21.68 -11 29 49.0 d H78
2008-03-19 01:19:41 C 07 18 21.22 -11 29 51.8 d H78
2008-03-19 01:20:45 C 07 18 20.96 -11 29 56.3 d H78
2008-03-19 01:21:49 C 07 18 20.43 -11 29 59.9 d H78
2008-03-19 01:22:49 C 07 18 20.11 -11 30 05.6 d H78
2008-03-19 01:23:53 C 07 18 19.79 -11 30 07.7 d H78
2008-03-19 01:24:56 C 07 18 19.33 -11 30 10.5 d H78
2008-03-19 01:26:00 C 07 18 18.92 -11 30 16.3 d H78
2008-03-20 19:45:25 C 07 03 29.43 -14 04 24.1 14.2 c 619
2008-07-21 03:03:48 C 02 47 48.76 +14 18 53.0 r J75
2008-07-21 03:22:01 C 02 47 49.91 +14 19 15.4 r J75
2008-07-21 03:40:15 C 02 47 50.82 +14 19 38.1 r J75
2008-07-29 09:44:35 C 02 58 26.18 +18 16 34.6 r 703
2008-07-29 09:53:49 C 02 58 26.65 +18 16 45.9 r 703
2008-07-29 10:03:06 C 02 58 27.12 +18 16 56.8 r 703
2008-07-29 10:12:23 C 02 58 27.58 +18 17 08.0 r 703
2008-08-03 02:41:48 C 03 04 04.36 +20 26 46.5 c J27
2008-08-03 02:53:16 C 03 04 04.90 +20 26 59.9 c J27
2008-08-03 03:05:13 C 03 04 05.46 +20 27 13.7 c J27
2008-08-18 01:17:37 C 03 18 37.14 +27 02 01.1 c J27
2008-08-18 01:26:48 C 03 18 37.44 +27 02 11.7 c J27
2008-08-18 01:33:05 C 03 18 37.62 +27 02 18.1 c J27
2008-08-26 09:31:26 C 03 23 27.08 +30 33 46.0 c 704
2008-08-26 09:50:02 C 03 23 27.31 +30 34 05.6 c 704
2008-08-26 10:08:40 C 03 23 27.55 +30 34 25.6 c 704
2008-08-26 10:27:12 C 03 23 27.81 +30 34 45.3 c 704
2008-08-26 10:45:42 C 03 23 28.00 +30 35 04.8 c 704
2008-08-27 00:24:00 C 03 23 41.05 +30 49 11.7 r 106
2008-08-27 00:37:48 C 03 23 41.23 +30 49 26.2 r 106
2008-08-27 00:51:39 C 03 23 41.42 +30 49 40.9 r 106
2008-08-27 01:05:29 C 03 23 41.59 +30 49 55.6 r 106
2008-08-27 19:25:40 C 03 23 57.05 +31 08 54.6 r 168
2008-08-27 19:29:21 C 03 23 57.13 +31 08 57.9 r 168
2008-08-27 19:30:25 C 03 23 57.12 +31 09 00.1 r 168
2008-08-28 18:39:12 C 03 24 13.90 +31 32 57.9 r 168
2008-08-28 18:40:52 C 03 24 13.92 +31 32 59.8 r 168
2008-08-28 23:27:38 C 03 24 16.84 +31 37 58.6 16.3 r 084
2008-09-02 00:42:21 C 03 24 49.77 +33 17 45.6 o J41
2008-09-02 01:12:05 C 03 24 49.76 +33 18 16.4 o J41
2008-09-02 01:41:08 C 03 24 49.67 +33 18 46.5 o J41
2008-09-03 23:44:31 C 03 24 43.55 +34 05 25.9 r A98
2008-09-03 23:46:15 C 03 24 43.54 +34 05 27.3 r A98
2008-09-03 23:48:02 C 03 24 43.53 +34 05 29.4 r A98
2008-09-03 23:49:47 C 03 24 43.51 +34 05 31.2 r A98
2008-09-03 23:51:32 C 03 24 43.47 +34 05 32.9 r A98
2008-09-03 23:53:19 C 03 24 43.48 +34 05 34.9 r A98
2008-09-03 23:55:03 C 03 24 43.48 +34 05 36.9 r A98
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)