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
1969-09-29 18:11:59 A 21 18 50.80 +06 55 31.9 119
1969-09-29 18:40:00 A 21 18 51.93 +06 55 51.1 119
1969-09-29 19:05:00 A 21 18 54.32 +06 56 07.9 119
1969-09-30 16:09:59 A 21 20 25.87 +07 09 51.2 119
1969-09-30 16:57:01 A 21 20 28.93 +07 10 22.0 119
1969-09-30 17:22:29 A 21 20 30.52 +07 10 37.9 119
1969-09-30 17:26:38 A 21 20 30.90 +07 10 40.5 095
1969-09-30 17:31:37 A 21 20 31.30 +07 10 41.5 095
1969-09-30 17:47:25 A 21 20 32.12 +07 10 53.6 119
1969-09-30 18:13:00 A 21 20 33.76 +07 11 10.1 119
1969-09-30 18:36:30 A 21 20 35.22 +07 11 24.0 119
1969-09-30 18:53:29 A 21 20 36.76 +07 11 35.2 119
1969-09-30 19:18:59 A 21 20 37.80 +07 11 48.8 119
1969-10-01 01:17:45 A 21 21 03.94 +07 16 12.7 805
1969-10-01 01:24:44 A 21 21 04.43 +07 16 15.5 805
1969-10-01 01:31:43 A 21 21 04.83 +07 16 19.7 805
1969-10-01 01:38:41 A 21 21 05.31 +07 16 24.7 805
1969-10-01 01:45:40 A 21 21 05.77 +07 16 27.5 805
1969-10-01 19:23:43 A 21 22 20.67 +07 26 27.0 999
1969-10-01 19:34:41 A 21 22 21.32 +07 26 33.6 999
1969-10-01 19:45:40 A 21 22 22.00 +07 26 40.8 999
1969-10-01 20:34:32 A 21 22 26.82 +07 27 24.1 999
1969-10-01 21:11:26 A 21 22 27.53 +07 27 30.6 999
1969-10-01 21:22:23 A 21 22 28.28 +07 27 37.8 999
1969-10-02 20:56:31 A 21 24 06.49 +07 41 00.6 999
1969-10-02 21:07:30 A 21 24 07.18 +07 41 06.4 999
1969-10-02 21:18:27 A 21 24 07.87 +07 41 12.3 999
1969-10-03 19:09:52 A 21 25 38.74 +07 52 53.2 999
1969-10-03 19:20:50 A 21 25 39.37 +07 52 59.3 999
1969-10-03 19:31:48 A 21 25 40.08 +07 53 06.1 999
1969-10-04 20:20:43 A 21 27 21.03 +08 05 34.4 999
1969-10-04 20:41:40 A 21 27 22.23 +08 05 43.7 999
1969-10-04 21:02:37 A 21 27 23.64 +08 05 55.7 999
1969-10-06 19:52:39 A 21 30 25.90 +08 31 04.8 020
1969-10-06 20:11:36 A 21 30 25.00 +08 31 00.8 020
1969-10-07 04:25:25 A 21 31 07.00 +08 31 14.5 695
1969-10-07 04:33:19 A 21 31 07.47 +08 31 17.9 695
1969-10-08 00:51:11 A 21 32 28.81 +08 40 11.3 805
1969-10-08 00:58:10 A 21 32 29.23 +08 40 14.8 805
1969-10-08 01:05:09 A 21 32 29.55 +08 40 17.2 805
1969-10-08 01:12:08 A 21 32 30.00 +08 40 19.4 805
1969-10-08 01:19:07 A 21 32 30.55 +08 40 22.4 805
1969-10-08 19:22:56 A 21 33 47.92 +08 44 50.1 020
1969-10-08 19:45:52 A 21 33 48.49 +08 45 00.1 020
1969-10-10 17:36:10 A 21 36 45.91 +09 04 18.6 095
1969-10-10 17:46:14 A 21 36 46.57 +09 04 21.4 095
1969-10-11 18:23:12 A 21 38 23.79 +09 12 52.9 095
1969-10-11 18:33:31 A 21 38 24.43 +09 12 56.3 095
1969-10-11 19:49:17 A 21 38 29.50 +09 13 19.6 033
1969-10-11 20:19:18 A 21 38 31.28 +09 13 29.8 033
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)