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
2012-03-11 18:49:59 C 05 14 21.64 +32 51 08.5 C91
2012-03-11 18:58:00 C 05 14 22.20 +32 51 04.4 C91
2012-03-12 02:39:37 C 05 14 55.72 +32 47 18.9 c 704
2012-03-12 02:55:44 C 05 14 56.81 +32 47 11.5 c 704
2012-03-12 03:11:53 C 05 14 58.06 +32 47 03.5 c 704
2012-03-12 03:28:14 C 05 14 59.17 +32 46 55.7 c 704
2012-03-12 03:44:24 C 05 15 00.30 +32 46 48.0 c 704
2012-03-13 20:32:15 C 05 18 00.97 +32 26 55.3 c A24
2012-03-13 20:33:17 C 05 18 01.06 +32 26 54.7 c A24
2012-03-13 21:39:30 C 05 18 05.85 +32 26 21.4 c A24
2012-03-13 21:40:33 C 05 18 05.99 +32 26 20.6 c A24
2012-03-14 20:08:01 C 05 19 47.57 +32 15 32.0 c A24
2012-03-14 20:09:04 C 05 19 47.65 +32 15 31.3 c A24
2012-03-15 20:23:16 C 05 21 38.62 +32 03 52.6 c A24
2012-03-15 20:24:19 C 05 21 38.70 +32 03 51.9 c A24
2012-03-17 18:56:58 C 05 25 16.24 +31 41 39.3 u B88
2012-03-17 19:07:23 C 05 25 17.06 +31 41 34.4 u B88
2012-03-17 19:17:49 C 05 25 17.85 +31 41 29.3 u B88
2012-03-21 19:07:19 C 05 33 02.16 +30 56 10.0 c A24
2012-03-21 19:08:21 C 05 33 02.23 +30 56 09.6 c A24
2012-03-21 21:50:16 C 05 33 15.43 +30 54 51.7 c A24
2012-03-21 21:51:18 C 05 33 15.52 +30 54 51.4 c A24
2012-03-23 20:51:13 C 05 37 11.37 +30 32 44.2 c A24
2012-03-23 20:52:16 C 05 37 11.45 +30 32 43.5 c A24
2012-04-14 03:13:19 C 06 24 15.97 +26 23 57.0 c 704
2012-04-14 03:29:52 C 06 24 17.59 +26 23 48.2 c 704
2012-04-14 03:46:28 C 06 24 19.22 +26 23 39.7 c 704
2012-04-14 04:02:35 C 06 24 20.77 +26 23 31.3 c 704
2012-04-16 02:58:18 C 06 29 00.59 +25 58 49.6 c 704
2012-04-16 03:14:14 C 06 29 02.17 +25 58 40.7 c 704
2012-04-16 03:30:17 C 06 29 03.76 +25 58 32.5 c 704
2012-04-16 03:46:22 C 06 29 05.31 +25 58 23.6 c 704
2012-04-16 04:02:20 C 06 29 06.98 +25 58 15.0 c 704
2012-04-21 02:50:35 C 06 41 08.02 +24 53 34.0 c 704
2012-04-21 03:06:15 C 06 41 09.61 +24 53 25.1 c 704
2012-04-21 03:21:58 C 06 41 11.20 +24 53 16.4 c 704
2012-04-21 03:37:52 C 06 41 12.80 +24 53 05.5 c 704
2012-04-24 18:27:58 C 06 50 10.45 +24 03 36.2 u C73
2012-04-24 18:30:18 C 06 50 10.72 +24 03 35.5 u C73
2012-04-24 18:32:37 C 06 50 10.97 +24 03 34.3 u C73
2012-04-24 18:34:56 C 06 50 11.19 +24 03 33.2 u C73
2012-04-24 18:37:16 C 06 50 11.37 +24 03 31.1 u C73
2012-04-24 18:39:35 C 06 50 11.71 +24 03 30.4 u C73
2012-04-24 18:41:53 C 06 50 11.93 +24 03 29.1 u C73
2012-04-24 18:44:12 C 06 50 12.02 +24 03 26.5 u C73
2012-04-24 18:50:16 C 06 50 12.77 +24 03 24.2 u C73
2012-04-24 19:04:41 C 06 50 14.29 +24 03 16.0 u C73
2012-04-24 19:19:07 C 06 50 15.75 +24 03 07.0 u C73
2012-04-24 19:21:26 C 06 50 15.98 +24 03 05.5 u C73
2012-04-24 19:23:45 C 06 50 16.20 +24 03 03.8 u C73
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)