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
2013-01-05 02:27:16 C 23 38 33.82 +11 17 26.0 u 703
2013-01-09 01:43:07 C 23 47 44.05 +12 10 21.9 c 704
2013-01-09 02:01:23 C 23 47 45.77 +12 10 31.9 c 704
2013-01-09 02:19:47 C 23 47 47.52 +12 10 41.7 c 704
2013-01-09 02:38:06 C 23 47 49.24 +12 10 52.1 c 704
2013-01-09 02:56:38 C 23 47 51.02 +12 11 02.1 c 704
2013-02-08 02:14:07 C 00 56 48.98 +18 27 36.2 r 703
2013-02-08 02:21:29 C 00 56 49.63 +18 27 40.1 r 703
2013-02-08 02:29:34 C 00 56 50.42 +18 27 43.6 r 703
2013-02-08 02:36:55 C 00 56 51.18 +18 27 46.8 r 703
2013-03-13 02:33:19 C 02 15 02.91 +24 25 02.5 u 703
2013-03-13 02:40:05 C 02 15 03.56 +24 25 05.0 u 703
2013-03-13 02:46:58 C 02 15 04.24 +24 25 06.7 u 703
2013-03-13 02:53:46 C 02 15 04.86 +24 25 10.5 u 703
2014-09-14 11:21:46 C 07 54 50.06 +31 50 11.5 q 703
2014-09-14 11:31:59 C 07 54 51.15 +31 50 09.4 q 703
2014-09-14 11:42:06 C 07 54 52.20 +31 50 08.0 q 703
2014-09-14 11:52:14 C 07 54 53.34 +31 50 05.0 q 703
2014-09-24 11:55:31 C 08 20 13.21 +30 55 07.4 q 703
2014-09-24 12:01:16 C 08 20 13.86 +30 55 05.5 q 703
2014-09-24 12:07:02 C 08 20 14.38 +30 55 03.8 q 703
2014-09-24 12:12:48 C 08 20 14.99 +30 55 03.8 q 703
2014-10-14 11:24:14 C 09 09 07.16 +28 29 21.4 q 703
2014-10-14 11:34:54 C 09 09 08.15 +28 29 17.2 q 703
2014-10-14 11:45:36 C 09 09 09.24 +28 29 13.7 q 703
2014-10-14 11:56:19 C 09 09 10.30 +28 29 10.4 q 703
2014-10-18 11:07:11 C 09 18 36.79 +27 54 58.8 q 703
2014-10-18 11:27:39 C 09 18 38.73 +27 54 50.9 q 703
2014-10-18 11:37:51 C 09 18 39.75 +27 54 48.0 q 703
2014-10-25 11:27:10 C 09 35 05.36 +26 50 36.0 q 703
2014-10-25 11:35:51 C 09 35 06.21 +26 50 32.6 q 703
2014-10-25 11:44:32 C 09 35 07.01 +26 50 29.5 q 703
2014-10-25 11:53:12 C 09 35 07.88 +26 50 26.4 q 703
2014-11-27 11:05:02 C 10 49 17.13 +20 41 56.7 q 703
2014-11-27 11:14:28 C 10 49 17.95 +20 41 51.6 q 703
2014-11-27 11:23:50 C 10 49 18.80 +20 41 46.4 q 703
2014-11-27 11:33:16 C 10 49 19.65 +20 41 41.6 q 703
2014-12-01 09:55:46 C 10 57 53.10 +19 49 53.1 q 703
2014-12-01 10:01:34 C 10 57 53.66 +19 49 49.9 q 703
2014-12-01 10:07:20 C 10 57 54.09 +19 49 46.7 q 703
2014-12-01 10:13:08 C 10 57 54.65 +19 49 43.5 q 703
2014-12-02 18:39:08 S 11 00 50.102 +19 31 30.65 L C51
2014-12-02 21:48:33 S 11 01 07.20 +19 29 43.9 L C51
2014-12-03 07:16:26 S 11 01 58.46 +19 24 21.6 L C51
2014-12-03 10:25:40 S 11 02 15.56 +19 22 33.1 L C51
2014-12-03 13:34:55 S 11 02 32.59 +19 20 44.7 L C51
2014-12-03 13:35:05 S 11 02 32.62 +19 20 45.1 L C51
2014-12-03 15:09:43 S 11 02 41.15 +19 19 50.3 L C51
2014-12-03 18:18:57 S 11 02 58.27 +19 18 02.4 L C51
2014-12-03 21:28:11 S 11 03 15.31 +19 16 13.6 L C51
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)