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
2012-05-20 03:31:34 C 07 56 17.62 +17 10 17.5 r 703
2012-05-20 03:38:57 C 07 56 18.38 +17 10 11.5 r 703
2012-05-20 03:46:16 C 07 56 19.21 +17 10 06.3 r 703
2012-09-30 00:44:09 C 18 15 32.16 -21 31 20.1 u H21
2012-09-30 00:48:45 C 18 15 33.39 -21 31 13.8 u H21
2012-09-30 00:53:43 C 18 15 34.67 -21 31 08.2 u H21
2012-09-30 00:59:00 C 18 15 36.07 -21 31 01.8 u H21
2012-09-30 01:05:58 C 18 15 37.89 -21 30 53.2 u H21
2012-10-15 01:46:12 C 19 38 00.23 -14 01 35.9 c 704
2012-10-15 02:06:09 C 19 38 04.02 -14 01 10.8 c 704
2012-10-15 02:25:42 C 19 38 07.69 -14 00 46.4 c 704
2012-10-15 02:45:42 C 19 38 11.55 -14 00 22.9 c 704
2012-10-15 03:05:26 C 19 38 15.32 -13 59 59.3 c 704
2012-11-08 01:57:45 C 21 09 00.93 -04 10 20.0 r 703
2012-11-08 01:59:57 C 21 09 01.22 -04 10 17.9 r 703
2012-11-08 02:02:08 C 21 09 01.51 -04 10 16.2 r 703
2012-11-08 02:04:23 C 21 09 01.80 -04 10 14.3 r 703
2012-11-10 01:45:29 C 21 15 12.62 -03 29 39.7 w I51
2012-11-10 01:52:51 C 21 15 13.54 -03 29 33.1 w I51
2012-11-14 01:49:17 C 21 27 16.18 -02 10 54.8 c 704
2012-11-14 02:11:10 C 21 27 18.79 -02 10 38.2 c 704
2012-11-14 02:33:07 C 21 27 21.46 -02 10 20.5 c 704
2012-11-14 02:55:08 C 21 27 24.11 -02 10 02.5 c 704
2012-11-16 01:36:02 C 21 33 05.19 -01 33 10.3 c 704
2012-11-16 01:58:16 C 21 33 07.84 -01 32 53.1 c 704
2012-11-16 02:19:46 C 21 33 10.42 -01 32 37.1 c 704
2012-11-16 02:42:00 C 21 33 13.06 -01 32 19.7 c 704
2012-11-16 03:03:58 C 21 33 15.63 -01 32 01.9 c 704
2012-11-24 03:38:24 C 21 55 40.76 +00 51 51.1 r 703
2012-11-24 03:47:10 C 21 55 41.77 +00 51 57.5 r 703
2012-11-24 03:56:01 C 21 55 42.70 +00 52 03.6 r 703
2012-11-24 04:04:52 C 21 55 43.71 +00 52 10.3 r 703
2012-11-25 11:45:35 C 21 59 16.87 +01 14 42.5 u D95
2012-11-25 11:50:51 C 21 59 17.44 +01 14 47.0 u D95
2012-11-25 11:51:54 C 21 59 17.61 +01 14 47.7 u D95
2012-12-05 02:52:39 C 22 24 18.31 +03 51 36.6 c 704
2012-12-05 03:30:33 C 22 24 22.23 +03 52 01.2 c 704
2012-12-05 03:49:36 C 22 24 24.22 +03 52 13.4 c 704
2012-12-05 04:08:35 C 22 24 26.20 +03 52 25.4 c 704
2012-12-09 17:32:59 C 22 35 50.22 +05 02 42.5 i C91
2012-12-09 17:42:00 C 22 35 51.15 +05 02 47.9 i C91
2012-12-09 17:48:00 C 22 35 51.73 +05 02 52.1 i C91
2012-12-09 17:53:59 C 22 35 52.36 +05 02 55.3 i C91
2012-12-11 01:23:07 C 22 39 06.66 +05 22 47.8 c 704
2012-12-11 01:41:40 C 22 39 08.51 +05 22 59.2 c 704
2012-12-11 02:00:29 C 22 39 10.43 +05 23 11.1 c 704
2012-12-11 02:19:31 C 22 39 12.38 +05 23 22.7 c 704
2012-12-11 02:38:11 C 22 39 14.26 +05 23 34.6 c 704
2013-01-05 01:57:44 C 23 38 30.98 +11 17 09.8 u 703
2013-01-05 02:17:38 C 23 38 32.89 +11 17 20.7 u 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)