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
2008-09-03 23:56:49 C 03 24 43.47 +34 05 38.6 r A98
2008-09-03 23:58:36 C 03 24 43.45 +34 05 40.2 r A98
2008-09-04 00:00:20 C 03 24 43.49 +34 05 42.3 r A98
2008-09-04 00:02:07 C 03 24 43.46 +34 05 43.7 r A98
2008-09-04 00:03:53 C 03 24 43.46 +34 05 45.3 r A98
2008-09-04 00:05:37 C 03 24 43.42 +34 05 47.2 r A98
2008-09-04 00:07:24 C 03 24 43.38 +34 05 48.8 r A98
2008-09-04 00:09:10 C 03 24 43.37 +34 05 50.8 r A98
2008-09-04 00:10:54 C 03 24 43.34 +34 05 52.8 r A98
2008-09-04 00:12:41 C 03 24 43.34 +34 05 54.4 r A98
2008-09-04 00:14:26 C 03 24 43.34 +34 05 56.1 r A98
2008-09-04 00:16:12 C 03 24 43.33 +34 05 58.3 r A98
2008-09-04 00:17:58 C 03 24 43.28 +34 05 59.8 r A98
2008-09-04 00:19:42 C 03 24 43.28 +34 06 02.0 r A98
2008-09-04 00:21:29 C 03 24 43.29 +34 06 03.6 r A98
2008-09-04 00:23:15 C 03 24 43.25 +34 06 05.4 r A98
2008-09-04 00:24:59 C 03 24 43.24 +34 06 07.0 r A98
2008-09-04 00:26:46 C 03 24 43.23 +34 06 08.6 r A98
2008-09-04 22:28:08 C 03 24 35.22 +34 28 14.8 16.5 r 084
2008-09-04 22:31:22 C 03 24 35.20 +34 28 18.2 16.4 r 084
2008-09-06 01:28:10 C 03 24 20.05 +34 55 17.7 15.9 r 084
2008-09-06 01:31:23 C 03 24 20.00 +34 55 20.7 15.7 r 084
2008-09-09 11:08:59 C 03 23 01.82 +36 15 58.4 r 703
2008-09-09 11:15:24 C 03 23 01.64 +36 16 04.5 r 703
2008-09-09 11:21:51 C 03 23 01.46 +36 16 11.1 r 703
2008-09-09 11:28:25 C 03 23 01.32 +36 16 17.5 r 703
2008-09-10 21:18:24 C 03 22 13.92 +36 48 54.4 16.8 r 084
2008-09-10 21:21:36 C 03 22 13.81 +36 48 57.4 16.9 r 084
2008-09-11 14:43:08 C 03 21 45.81 +37 05 43.9 r 379
2008-09-11 14:48:27 C 03 21 45.64 +37 05 49.0 r 379
2008-09-11 14:57:50 C 03 21 45.34 +37 05 58.3 r 379
2008-09-11 15:07:09 C 03 21 45.09 +37 06 07.5 r 379
2008-09-11 15:09:49 C 03 21 44.99 +37 06 10.3 r 379
2008-09-11 15:12:29 C 03 21 44.90 +37 06 12.5 r 379
2008-09-11 15:21:48 C 03 21 44.63 +37 06 22.0 r 379
2008-09-17 01:43:13 C 03 16 45.90 +39 07 31.6 v 204
2008-09-17 01:47:27 C 03 16 45.67 +39 07 35.4 v 204
2008-09-17 03:11:06 C 03 16 41.29 +39 08 50.8 v 204
2008-09-17 03:15:20 C 03 16 41.06 +39 08 54.5 v 204
2008-09-22 00:17:16 C 03 09 54.43 +40 49 29.0 16.4 r 084
2008-09-22 23:55:51 C 03 08 15.51 +41 08 35.5 16.2 r 084
2008-09-23 00:55:46 C 03 08 10.98 +41 09 25.7 r A98
2008-09-23 00:58:01 C 03 08 10.81 +41 09 27.5 r A98
2008-09-23 01:00:16 C 03 08 10.64 +41 09 29.1 r A98
2008-09-23 01:02:33 C 03 08 10.48 +41 09 31.0 r A98
2008-09-23 01:04:48 C 03 08 10.32 +41 09 32.8 r A98
2008-09-23 01:07:03 C 03 08 10.13 +41 09 34.5 r A98
2008-09-23 01:09:20 C 03 08 09.96 +41 09 36.4 r A98
2008-09-23 01:11:34 C 03 08 09.79 +41 09 38.1 r A98
2008-09-23 01:13:50 C 03 08 09.63 +41 09 39.9 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)