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
2007-11-18 10:23:37 C 09 56 43.00 +28 38 20.9 r 703
2007-11-21 09:21:04 C 10 02 18.74 +28 21 20.5 r G96
2007-11-21 09:27:23 C 10 02 19.24 +28 21 18.6 r G96
2007-11-21 09:33:45 C 10 02 19.71 +28 21 17.5 r G96
2007-11-21 09:40:02 C 10 02 20.18 +28 21 16.2 r G96
2007-12-05 04:37:39 C 10 26 49.43 +27 04 11.1 c A24
2007-12-05 04:39:08 C 10 26 49.45 +27 04 10.8 c A24
2007-12-06 11:35:09 C 10 28 57.79 +26 57 18.6 r 703
2007-12-06 11:42:05 C 10 28 58.29 +26 57 18.8 r 703
2007-12-06 11:48:59 C 10 28 58.72 +26 57 16.0 r 703
2007-12-06 11:55:53 C 10 28 59.34 +26 57 16.3 r 703
2007-12-15 02:46:18 C 10 42 28.73 +26 13 09.8 r J51
2007-12-15 03:00:31 C 10 42 29.63 +26 13 06.7 r J51
2007-12-15 03:14:45 C 10 42 30.48 +26 13 04.1 r J51
2007-12-19 09:20:27 C 10 48 35.49 +25 52 42.6 r H45
2007-12-19 09:23:11 C 10 48 35.64 +25 52 42.0 r H45
2007-12-19 09:23:18 C 10 48 35.86 +25 52 42.5 c 704
2007-12-19 09:24:42 C 10 48 35.72 +25 52 41.8 r H45
2007-12-19 09:25:56 C 10 48 35.78 +25 52 41.6 r H45
2007-12-19 09:27:49 C 10 48 35.88 +25 52 41.2 r H45
2007-12-19 09:42:04 C 10 48 36.89 +25 52 39.0 c 704
2007-12-19 10:00:49 C 10 48 37.91 +25 52 35.6 c 704
2007-12-19 10:19:34 C 10 48 38.93 +25 52 31.9 c 704
2007-12-19 10:38:21 C 10 48 39.94 +25 52 28.0 c 704
2007-12-24 10:27:12 C 10 55 15.30 +25 29 48.9 r H45
2007-12-24 10:28:13 C 10 55 15.34 +25 29 48.6 r H45
2007-12-24 10:31:03 C 10 55 15.47 +25 29 48.2 r H45
2007-12-24 10:42:47 C 10 55 16.06 +25 29 46.1 r H45
2007-12-24 10:45:16 C 10 55 16.16 +25 29 45.6 r H45
2007-12-25 10:02:59 C 10 56 28.73 +25 25 31.1 r H45
2007-12-25 10:04:57 C 10 56 28.83 +25 25 31.0 r H45
2007-12-25 10:15:56 C 10 56 29.37 +25 25 28.7 r H45
2007-12-25 10:19:26 C 10 56 29.52 +25 25 27.9 r H45
2007-12-25 10:22:33 C 10 56 29.69 +25 25 27.6 r H45
2007-12-30 11:49:21 C 11 02 20.46 +25 04 12.3 r H45
2007-12-30 11:50:35 C 11 02 20.51 +25 04 12.2 r H45
2007-12-30 11:52:09 C 11 02 20.57 +25 04 11.9 r H45
2007-12-30 11:54:09 C 11 02 20.66 +25 04 11.6 r H45
2007-12-30 11:55:56 C 11 02 20.73 +25 04 11.3 r H45
2008-01-02 03:17:29 C 11 05 05.28 +24 53 42.6 r J51
2008-01-02 03:27:25 C 11 05 05.66 +24 53 41.1 r J51
2008-01-02 03:37:22 C 11 05 06.03 +24 53 39.5 r J51
2008-01-07 01:14:50 C 11 09 29.93 +24 35 06.8 r J51
2008-01-07 01:28:22 C 11 09 30.35 +24 35 05.0 r J51
2008-01-07 01:41:41 C 11 09 30.77 +24 35 03.2 r J51
2008-01-12 09:25:35 C 11 13 07.26 +24 16 01.8 c 704
2008-01-12 09:44:08 C 11 13 07.63 +24 15 59.0 c 704
2008-01-12 10:03:07 C 11 13 07.97 +24 15 55.6 c 704
2008-01-12 10:21:37 C 11 13 08.36 +24 15 53.1 c 704
2008-01-21 08:05:30 C 11 15 51.00 +23 43 31.2 r H45
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)