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
2008-02-28 07:18:26 C 09 49 12.59 +13 46 42.3 c 704
2008-02-28 07:34:53 C 09 49 08.37 +13 46 10.2 c 704
2008-02-29 21:32:51 C 09 39 38.85 +12 26 19.5 r J51
2008-02-29 21:39:17 C 09 39 37.11 +12 26 05.5 r J51
2008-02-29 21:45:22 C 09 39 35.46 +12 25 52.1 r J51
2008-03-01 07:55:27 C 09 36 51.98 +12 02 53.7 r H45
2008-03-01 07:57:05 C 09 36 51.53 +12 02 49.9 r H45
2008-03-01 07:58:36 C 09 36 51.12 +12 02 46.4 r H45
2008-03-01 07:59:44 C 09 36 50.80 +12 02 43.8 r H45
2008-03-01 08:01:22 C 09 36 50.36 +12 02 40.0 r H45
2008-03-01 21:43:13 C 09 33 13.82 +11 30 45.5 c 560
2008-03-01 21:46:48 C 09 33 12.81 +11 30 36.7 c 560
2008-03-01 21:51:06 C 09 33 11.60 +11 30 26.9 c 560
2008-03-05 22:40:21 C 09 05 16.40 +07 12 19.6 12.8 c B61
2008-03-05 22:43:24 C 09 05 15.38 +07 12 10.5 12.9 c B61
2008-03-05 22:47:51 C 09 05 13.89 +07 11 57.8 12.9 c B61
2008-03-05 22:54:55 C 09 05 11.65 +07 11 36.2 12.6 c B61
2008-03-05 23:54:40 C 09 04 52.15 +07 08 31.6 12.6 r A97
2008-03-05 23:58:03 C 09 04 51.08 +07 08 21.7 12.8 r A97
2008-03-06 00:01:25 C 09 04 50.01 +07 08 11.4 12.8 r A97
2008-03-06 00:04:48 C 09 04 48.94 +07 08 01.5 12.8 r A97
2008-03-06 00:08:11 C 09 04 47.89 +07 07 51.4 13.0 r A97
2008-03-06 00:11:04 C 09 04 46.99 +07 07 43.3 13.0 r A97
2008-03-06 00:12:25 C 09 04 46.75 +07 07 30.5 r 084
2008-03-06 00:15:35 C 09 04 45.77 +07 07 21.0 r 084
2008-03-06 00:17:09 C 09 04 45.29 +07 07 16.4 r 084
2008-03-07 17:49:25 C 08 51 46.78 +04 58 54.7 r B18
2008-03-07 17:50:29 C 08 51 46.42 +04 58 51.3 r B18
2008-03-07 17:52:37 C 08 51 45.71 +04 58 44.3 r B18
2008-03-07 17:53:41 C 08 51 45.36 +04 58 40.8 r B18
2008-03-07 17:54:45 C 08 51 45.00 +04 58 37.5 r B18
2008-03-07 17:55:49 C 08 51 44.64 +04 58 34.0 r B18
2008-03-07 17:56:53 C 08 51 44.28 +04 58 30.5 r B18
2008-03-07 17:57:57 C 08 51 43.93 +04 58 27.2 r B18
2008-03-07 17:59:01 C 08 51 43.57 +04 58 23.8 r B18
2008-03-07 18:00:05 C 08 51 43.22 +04 58 20.3 r B18
2008-03-07 20:29:55 C 08 50 53.20 +04 50 17.5 r B18
2008-03-07 20:31:57 C 08 50 52.51 +04 50 10.8 r B18
2008-03-08 21:36:12 C 08 42 46.35 +03 27 41.0 c J32
2008-03-08 22:54:25 C 08 42 19.50 +03 23 17.7 c J32
2008-03-10 06:42:35 C 08 31 44.70 +01 33 55.7 c 704
2008-03-10 06:58:22 C 08 31 39.21 +01 33 00.0 c 704
2008-03-10 07:14:19 C 08 31 33.66 +01 32 03.5 c 704
2008-03-10 07:30:06 C 08 31 28.18 +01 31 08.9 c 704
2008-03-10 07:46:08 C 08 31 22.64 +01 30 11.7 c 704
2008-03-10 21:38:38 C 08 26 43.40 +00 40 49.0 13.3 r A97
2008-03-10 21:42:00 C 08 26 42.20 +00 40 37.1 13.4 r A97
2008-03-10 21:45:23 C 08 26 41.01 +00 40 24.9 13.5 r A97
2008-03-10 21:48:45 C 08 26 39.83 +00 40 13.0 13.6 r A97
2008-03-10 21:52:08 C 08 26 38.65 +00 40 00.8 13.7 r A97
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)