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
2008-09-23 01:16:06 C 03 08 09.45 +41 09 41.8 r A98
2008-09-23 01:18:21 C 03 08 09.24 +41 09 43.3 r A98
2008-09-23 01:20:36 C 03 08 09.08 +41 09 45.5 r A98
2008-09-23 01:22:53 C 03 08 08.94 +41 09 46.9 r A98
2008-09-23 01:25:07 C 03 08 08.76 +41 09 49.0 r A98
2008-09-23 01:27:23 C 03 08 08.61 +41 09 50.7 r A98
2008-09-23 08:44:13 C 03 07 37.41 +41 15 43.4 c 704
2008-09-23 09:01:42 C 03 07 35.97 +41 15 58.3 c 704
2008-09-23 09:19:12 C 03 07 34.64 +41 16 11.0 c 704
2008-09-23 09:36:50 C 03 07 33.24 +41 16 24.9 c 704
2008-09-25 20:57:46 C 03 02 53.97 +42 01 31.1 r A98
2008-09-25 20:59:53 C 03 02 53.81 +42 01 32.1 r A98
2008-09-25 21:01:59 C 03 02 53.62 +42 01 33.7 r A98
2008-09-25 21:06:09 C 03 02 53.25 +42 01 37.0 r A98
2008-09-27 21:09:58 C 02 58 40.18 +42 35 34.5 c 127
2008-09-27 21:16:55 C 02 58 39.50 +42 35 39.4 r A27
2008-09-27 21:24:39 C 02 58 38.78 +42 35 45.0 r A27
2008-09-27 21:26:35 C 02 58 38.62 +42 35 46.4 c 127
2008-09-27 21:34:05 C 02 58 37.89 +42 35 51.4 r A27
2008-09-27 21:35:28 C 02 58 37.80 +42 35 52.7 c 127
2008-09-27 23:17:59 C 02 58 28.24 +42 37 06.1 r A06
2008-09-27 23:23:33 C 02 58 27.74 +42 37 10.1 r A06
2008-09-27 23:28:19 C 02 58 27.31 +42 37 13.5 r A06
2008-09-30 23:05:00 C 02 51 24.55 +43 22 29.4 15.2 r 084
2008-09-30 23:08:12 C 02 51 24.22 +43 22 31.3 15.1 r 084
2008-10-04 00:03:57 C 02 43 24.23 +44 01 27.3 15.6 r 084
2008-10-04 00:07:10 C 02 43 23.85 +44 01 28.9 15.6 r 084
2008-10-04 22:44:36 C 02 40 46.61 +44 11 57.4 v J34
2008-10-04 22:50:26 C 02 40 45.93 +44 12 00.3 v J34
2008-10-05 20:49:29 C 02 38 07.97 +44 21 17.2 15.3 r 084
2008-10-05 20:52:41 C 02 38 07.58 +44 21 18.5 15.3 r 084
2008-10-06 20:29:29 C 02 35 14.28 +44 30 27.2 15.2 r 084
2008-10-06 20:32:41 C 02 35 13.91 +44 30 28.4 15.2 r 084
2008-10-06 22:12:29 C 02 35 01.95 +44 31 08.6 r J27
2008-10-06 22:22:27 C 02 35 00.68 +44 31 12.4 r J27
2008-10-06 22:29:11 C 02 34 59.82 +44 31 15.1 r J27
2008-10-07 19:42:03 C 02 32 20.27 +44 38 30.2 15.4 r 084
2008-10-07 19:45:16 C 02 32 19.87 +44 38 31.3 15.3 r 084
2008-10-07 19:54:33 C 02 32 18.73 +44 38 35.8 r A98
2008-10-07 19:57:30 C 02 32 18.35 +44 38 36.8 r A98
2008-10-07 20:00:24 C 02 32 17.98 +44 38 37.8 r A98
2008-10-07 20:03:21 C 02 32 17.59 +44 38 38.8 r A98
2008-10-07 20:06:16 C 02 32 17.21 +44 38 39.6 r A98
2008-10-07 20:09:11 C 02 32 16.85 +44 38 40.7 r A98
2008-10-08 00:00:27 C 02 31 46.80 +44 39 56.2 16.3 r 084
2008-10-08 00:03:40 C 02 31 46.38 +44 39 57.2 16.3 r 084
2008-10-08 21:43:45 C 02 29 01.11 +44 46 27.2 c J93
2008-10-08 21:45:49 C 02 29 00.84 +44 46 27.6 c J93
2008-10-08 21:47:51 C 02 29 00.57 +44 46 28.2 c J93
2008-10-09 01:16:09 C 02 28 32.51 +44 47 26.1 15.4 r 084
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)