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
2008-03-10 21:57:12 C 08 26 36.87 +00 39 42.8 13.9 r A97
2008-03-10 22:03:06 C 08 26 34.80 +00 39 21.6 14.0 r A97
2008-03-10 22:08:11 C 08 26 33.03 +00 39 03.5 14.1 r A97
2008-03-11 21:18:25 C 08 18 39.09 -00 44 48.4 r 084
2008-03-11 21:19:57 C 08 18 38.55 -00 44 53.9 r 084
2008-03-11 21:37:14 C 08 18 32.96 -00 45 46.8 r 169
2008-03-11 21:39:17 C 08 18 32.30 -00 45 54.6 r 169
2008-03-12 01:00:58 C 08 17 25.59 -00 58 10.7 o H51
2008-03-12 01:01:33 C 08 17 25.38 -00 58 12.7 o H51
2008-03-12 01:02:10 C 08 17 25.15 -00 58 15.1 o H51
2008-03-12 01:02:59 C 08 17 24.84 -00 58 18.4 o H51
2008-03-12 01:03:37 C 08 17 24.64 -00 58 20.6 o H51
2008-03-12 01:04:14 C 08 17 24.42 -00 58 22.8 o H51
2008-03-12 01:05:02 C 08 17 24.15 -00 58 25.6 o H51
2008-03-12 01:05:39 C 08 17 23.91 -00 58 27.9 o H51
2008-03-12 01:06:16 C 08 17 23.69 -00 58 30.1 o H51
2008-03-12 01:07:07 C 08 17 23.39 -00 58 33.2 o H51
2008-03-12 01:07:43 C 08 17 23.17 -00 58 35.4 o H51
2008-03-12 01:08:19 C 08 17 22.96 -00 58 37.7 o H51
2008-03-15 00:10:20 C 07 52 39.04 -05 23 45.4 d H78
2008-03-15 00:11:05 C 07 52 38.71 -05 23 49.3 d H78
2008-03-15 00:11:44 C 07 52 38.38 -05 23 51.9 d H78
2008-03-15 00:12:22 C 07 52 38.18 -05 23 54.1 d H78
2008-03-15 00:13:01 C 07 52 37.99 -05 23 55.3 d H78
2008-03-15 00:13:39 C 07 52 37.78 -05 23 58.2 d H78
2008-03-15 00:14:18 C 07 52 37.48 -05 24 01.5 d H78
2008-03-15 00:14:48 C 07 52 37.39 -05 24 02.5 d H78
2008-03-15 00:15:33 C 07 52 37.17 -05 24 05.9 d H78
2008-03-15 00:15:48 C 07 52 36.96 -05 24 08.6 d H78
2008-03-17 01:38:24 C 07 35 10.42 -08 31 26.2 d H78
2008-03-17 01:39:49 C 07 35 09.80 -08 31 30.9 d H78
2008-03-17 01:41:00 C 07 35 09.37 -08 31 37.4 d H78
2008-03-17 01:44:10 C 07 35 08.06 -08 31 49.6 d H78
2008-03-17 01:45:40 C 07 35 07.55 -08 31 52.9 d H78
2008-03-17 01:46:39 C 07 35 07.30 -08 31 57.9 d H78
2008-03-17 01:48:15 C 07 35 06.63 -08 32 02.4 d H78
2008-03-17 01:50:58 C 07 35 05.70 -08 32 14.7 d H78
2008-03-17 01:52:15 C 07 35 05.14 -08 32 19.6 d H78
2008-03-17 01:53:31 C 07 35 04.69 -08 32 23.2 d H78
2008-03-17 01:54:46 C 07 35 04.31 -08 32 27.1 d H78
2008-03-17 01:56:05 C 07 35 03.64 -08 32 31.8 d H78
2008-03-17 01:57:04 C 07 35 03.30 -08 32 36.5 d H78
2008-03-17 20:10:21 C 07 28 37.93 -09 41 58.1 12.1 c 619
2008-03-19 01:08:00 C 07 18 25.59 -11 29 09.5 d H78
2008-03-19 01:09:15 C 07 18 24.97 -11 29 12.0 d H78
2008-03-19 01:10:18 C 07 18 24.72 -11 29 18.5 d H78
2008-03-19 01:11:21 C 07 18 24.42 -11 29 22.7 d H78
2008-03-19 01:12:24 C 07 18 23.94 -11 29 25.6 d H78
2008-03-19 01:13:25 C 07 18 23.61 -11 29 28.4 d H78
2008-03-19 01:14:27 C 07 18 23.20 -11 29 31.9 d H78
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)