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
2009-01-29 19:45:46 C 01 54 42.59 +28 44 29.0 o B84
2009-01-29 20:11:29 C 01 54 44.50 +28 44 29.8 18.3 o C20
2009-01-29 20:34:09 C 01 54 46.34 +28 44 30.9 o B84
2009-02-01 01:56:51 C 01 58 59.64 +28 46 58.4 c 704
2009-02-01 02:13:47 C 01 59 00.99 +28 46 57.1 c 704
2009-02-01 02:30:40 C 01 59 02.25 +28 47 00.1 c 704
2009-02-01 02:47:49 C 01 59 03.64 +28 47 00.3 c 704
2009-02-01 03:04:59 C 01 59 04.96 +28 47 00.6 c 704
2009-03-26 02:44:34 C 03 56 53.34 +30 38 58.2 r G96
2009-03-26 02:52:29 C 03 56 54.13 +30 38 58.5 r G96
2009-03-26 03:00:29 C 03 56 54.96 +30 38 58.9 r G96
2009-03-26 03:08:21 C 03 56 55.75 +30 38 59.3 r G96
2009-03-28 02:49:18 C 04 01 53.86 +30 41 42.3 r 703
2009-03-28 02:49:57 C 04 01 53.94 +30 41 41.7 r 703
2009-03-28 02:55:33 C 04 01 54.58 +30 41 42.7 r 703
2009-03-28 02:56:16 C 04 01 54.48 +30 41 41.8 r 703
2009-03-28 03:01:39 C 04 01 55.02 +30 41 41.9 r 703
2009-03-28 03:02:20 C 04 01 55.27 +30 41 40.9 r 703
2009-03-28 03:07:56 C 04 01 55.81 +30 41 42.3 r 703
2009-03-28 03:08:39 C 04 01 55.92 +30 41 41.5 r 703
2010-12-08 12:17:49 C 13 16 04.22 -07 45 52.0 r 703
2010-12-08 12:24:29 C 13 16 05.26 -07 46 00.3 r 703
2010-12-08 12:31:19 C 13 16 06.27 -07 46 09.5 r 703
2010-12-08 12:38:00 C 13 16 07.24 -07 46 17.6 r 703
2010-12-11 04:54:48 C 13 25 44.77 -09 09 54.9 u 160
2010-12-11 04:58:45 C 13 25 45.33 -09 10 00.2 u 160
2010-12-11 05:02:45 C 13 25 46.00 -09 10 05.4 u 160
2011-01-07 07:16:26 C 15 20 51.52 -23 14 17.8 o 844
2011-01-07 07:19:55 C 15 20 52.21 -23 14 22.1 o 844
2011-01-07 07:21:44 C 15 20 52.62 -23 14 24.6 o 844
2011-01-07 07:23:02 C 15 20 52.88 -23 14 26.3 o 844
2011-10-03 04:11:29 C 06 40 04.35 +40 16 40.3 c A24
2011-10-03 04:13:34 C 06 40 04.49 +40 16 40.7 c A24
2011-10-04 02:49:04 C 06 41 41.32 +40 23 55.9 c A24
2011-10-04 02:51:07 C 06 41 41.44 +40 23 56.9 c A24
2011-10-04 03:08:22 C 06 41 42.63 +40 24 02.6 c A24
2011-10-04 03:26:09 C 06 41 43.86 +40 24 08.6 c A24
2011-10-04 03:43:23 C 06 41 45.04 +40 24 14.3 c A24
2011-10-04 03:45:27 C 06 41 45.20 +40 24 15.2 c A24
2011-10-07 10:02:15 C 06 47 09.95 +40 49 49.9 c 704
2011-10-07 10:21:01 C 06 47 11.18 +40 49 55.6 c 704
2011-10-07 10:58:45 C 06 47 13.63 +40 50 08.9 c 704
2011-10-13 14:51:41 C 06 56 38.839 +41 40 33.63 L F51
2011-10-13 15:10:42 C 06 56 39.927 +41 40 40.40 L F51
2011-10-13 15:27:57 C 06 56 40.916 +41 40 46.48 L F51
2011-10-14 09:53:34 C 06 57 46.72 +41 47 15.2 t H47
2011-10-14 10:30:21 C 06 57 48.83 +41 47 28.7 t H47
2011-10-14 10:45:15 C 06 57 49.67 +41 47 34.1 t H47
2011-11-03 09:31:07 C 07 18 06.66 +45 02 48.1 r 703
2011-11-03 09:38:26 C 07 18 06.84 +45 02 51.5 r 703
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)