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
1983-03-11 16:09:59 A 09 23 00.50 -19 50 02.6 323
1983-03-11 22:23:51 A 09 20 01.70 -20 32 34.8 022
1983-03-11 22:34:51 A 09 19 56.22 -20 33 46.8 022
1983-03-11 22:44:49 A 09 19 50.90 -20 34 48.1 022
1983-03-11 22:54:46 A 09 19 46.28 -20 35 51.7 022
1983-03-11 23:04:45 A 09 19 40.71 -20 37 05.8 022
1983-03-11 23:14:44 A 09 19 35.76 -20 38 07.9 022
1983-03-11 23:24:42 A 09 19 30.31 -20 39 11.1 022
1983-03-18 11:14:16 A 07 46 01.19 -37 00 58.2 474
1983-03-18 11:17:19 A 07 45 58.99 -37 01 14.1 474
1983-03-18 11:32:38 A 07 45 49.68 -37 02 56.3 415
1983-03-18 11:47:17 A 07 45 38.88 -37 04 14.2 415
1983-03-21 08:47:50 A 06 56 01.05 -42 19 49.6 474
1983-03-21 08:52:01 A 06 55 57.68 -42 20 05.1 474
1983-03-21 11:19:00 A 06 54 11.91 -42 29 33.6 323
1983-03-22 11:21:59 A 06 36 36.34 -43 51 34.6 323
1983-03-23 11:19:59 A 06 19 14.35 -44 59 41.8 323
1983-03-24 11:28:00 A 06 02 04.96 -45 55 15.4 323
1983-03-25 11:19:00 A 05 45 36.33 -46 38 10.8 323
1983-12-04 01:19:09 A 00 54 04.89 +35 17 31.0 A 801
1986-12-02 08:31:33 A 07 22 53.24 +49 57 36.4 B 691
1986-12-02 08:44:57 A 07 22 52.27 +49 57 44.0 B 691
1986-12-02 08:57:14 A 07 22 51.45 +49 57 49.7 B 691
1990-01-31 20:00:29 13 56 21.72 -10 14 52.1 m 323
1993-09-11 14:44:00 06 36 08.34 +36 25 26.4 z 568
1993-09-16 11:03:58 06 47 20.21 +36 41 56.0 711
1993-09-17 11:05:13 06 49 37.18 +36 45 10.0 711
1993-11-14 11:03:13 08 33 12.82 +40 18 47.6 711
1993-11-15 10:52:09 08 34 12.01 +40 25 28.4 711
1993-11-19 15:09:19 C 08 37 53.11 +40 55 47.2 z 568
1993-11-23 11:28:31 C 08 40 32.28 +41 26 49.1 z 658
1993-11-23 11:33:59 C 08 40 32.37 +41 26 50.8 z 658
1993-11-23 11:37:31 C 08 40 32.48 +41 26 52.3 z 658
1993-11-25 11:54:46 C 08 41 36.69 +41 44 25.4 z 658
1993-11-25 11:58:47 C 08 41 36.77 +41 44 26.9 z 658
1993-11-25 12:05:17 C 08 41 36.88 +41 44 29.3 z 658
1994-01-03 19:38:51 C 07 56 06.47 +48 45 03.0 557
1994-01-03 19:52:12 C 07 56 04.76 +48 45 06.8 557
1994-01-03 19:54:58 C 07 56 04.35 +48 45 07.4 557
1994-01-03 19:57:43 C 07 56 04.01 +48 45 08.1 557
1994-01-03 20:00:29 C 07 56 03.64 +48 45 08.9 557
1994-01-03 20:03:14 C 07 56 03.23 +48 45 09.5 557
1994-01-08 06:33:15 07 41 23.35 +49 03 52.5 711
1994-01-09 07:11:02 07 37 48.27 +49 05 38.5 711
1994-01-10 06:33:02 07 34 21.59 +49 06 21.3 711
1994-01-11 08:48:14 A 07 30 25.76 +49 05 57.0 16.0 675
1994-01-11 09:24:29 A 07 30 20.30 +49 05 56.6 675
1994-01-12 19:28:07 C 07 25 12.71 +49 03 30.8 557
1994-01-12 19:32:25 C 07 25 12.01 +49 03 30.4 557
1994-01-12 19:38:14 C 07 25 11.12 +49 03 30.1 557
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)