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
1994-08-17 08:34:01 C 09 30 42.06 -50 52 55.9 413
1994-08-17 08:42:38 C 09 30 42.33 -50 54 00.7 413
1994-08-17 08:47:44 C 09 30 42.42 -50 54 39.1 413
1994-08-17 19:45:53 C 09 31 17.66 -52 25 35.0 413
1994-08-17 19:47:59 C 09 31 17.71 -52 25 54.0 413
1994-08-17 19:50:04 C 09 31 17.72 -52 26 12.8 413
1994-08-22 11:05:29 09 39 39.89 -78 36 18.8 323
1994-08-22 14:59:15 09 42 18.66 -80 00 12.7 323
1994-08-25 12:54:01 C 21 21 09.36 -67 55 56.4 422
1994-08-26 03:15:52 C 21 22 54.34 -60 43 12.0 834
1994-08-26 03:17:08 C 21 22 54.29 -60 42 34.7 834
1994-08-26 03:19:03 C 21 22 54.34 -60 41 36.1 834
1994-08-26 04:13:37 C 21 22 52.95 -60 14 25.7 834
1994-08-26 04:14:21 C 21 22 52.61 -60 14 03.0 834
1994-08-26 04:14:59 C 21 22 52.85 -60 13 44.3 834
1994-08-26 04:18:36 C 21 22 52.66 -60 11 58.4 834
1994-08-26 11:46:00 21 24 00.65 -56 32 23.1 323
1994-08-26 17:33:41 C 21 23 40.67 -53 46 02.7 413
1994-08-26 17:36:29 C 21 23 40.74 -53 44 41.5 413
1994-08-26 17:39:18 C 21 23 40.85 -53 43 20.2 413
1994-08-27 01:23:55 C 21 24 38.74 -50 09 58.3 834
1994-08-27 01:24:50 C 21 24 38.59 -50 09 30.2 834
1994-08-27 01:37:26 C 21 24 38.20 -50 03 51.3 834
1994-08-27 01:38:05 C 21 24 38.13 -50 03 32.8 834
1994-08-27 01:38:51 C 21 24 38.21 -50 03 13.6 834
1994-08-28 13:45:08 C 21 25 48.48 -35 29 46.0 413
1994-08-28 13:47:43 C 21 25 48.40 -35 28 51.4 413
1994-08-28 17:25:18 C 21 25 43.42 -34 12 29.5 413
1994-08-28 17:27:56 C 21 25 43.43 -34 11 34.8 413
1994-08-28 17:32:54 C 21 25 43.43 -34 09 51.4 413
1994-08-28 18:03:52 C 21 25 43.65 -33 59 06.2 413
1994-08-28 18:05:52 C 21 25 43.67 -33 58 24.5 413
1994-08-28 20:26:19 C 21 26 07.03 -33 15 38.6 z 596
1994-08-28 20:34:17 C 21 26 06.77 -33 13 00.7 z 596
1994-08-28 20:43:41 C 21 26 06.48 -33 10 03.1 z 596
1994-08-28 20:54:08 C 21 26 06.08 -33 06 29.7 z 596
1994-08-29 00:06:58 C 21 26 15.81 -31 59 43.5 10.1 834
1994-08-29 00:45:57 C 21 26 14.90 -31 47 17.8 10.4 834
1994-08-29 14:48:59 21 26 27.07 -27 32 58.7 323
1994-08-29 15:15:59 21 26 26.13 -27 25 18.3 323
1994-08-29 22:05:59 21 26 35.00 -25 36 10.2 m 026
1994-08-29 22:12:00 21 26 34.92 -25 34 33.8 m 026
1994-08-30 04:37:14 C 21 26 47.40 -23 54 26.6 z 670
1994-08-30 05:26:14 C 21 26 46.11 -23 42 16.2 z 670
1994-08-30 05:51:14 C 21 26 45.37 -23 36 04.3 z 670
1994-08-30 06:31:14 C 21 26 44.13 -23 26 11.3 z 670
1994-08-31 00:02:29 T 21 27 00.203 -19 25 16.72 950
1994-08-31 03:48:07 C 21 27 10.42 -18 38 14.9 z 670
1994-08-31 04:21:07 C 21 27 09.80 -18 31 34.0 z 670
1994-08-31 05:03:07 C 21 27 08.89 -18 23 06.0 z 670
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)