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
1994-01-12 19:42:24 C 07 25 10.49 +49 03 29.5 557
1994-01-13 07:10:14 A 07 23 25.45 +49 02 19.3 675
1994-01-13 07:45:59 A 07 23 19.74 +49 02 15.7 675
1994-01-13 19:23:57 C 07 21 34.33 +49 00 35.5 557
1994-01-13 19:28:36 C 07 21 33.61 +49 00 34.9 557
1994-01-13 19:32:05 C 07 21 33.07 +49 00 34.7 557
1994-01-13 19:35:49 C 07 21 32.49 +49 00 34.2 557
1994-01-13 19:39:02 C 07 21 31.99 +49 00 33.8 557
1994-01-18 01:45:02 C 07 05 59.24 +48 35 59.5 557
1994-01-18 02:27:55 C 07 05 52.69 +48 35 43.7 557
1994-01-18 02:55:02 C 07 05 48.57 +48 35 33.8 557
1994-01-18 03:33:08 C 07 05 42.80 +48 35 19.7 557
1994-01-18 04:17:04 C 07 05 36.18 +48 35 03.6 557
1994-01-18 04:54:45 C 07 05 30.50 +48 34 49.3 557
1994-01-19 21:25:46 06 59 29.93 +48 19 35.6 m 494
1994-01-19 22:02:00 06 59 24.52 +48 19 20.8 m 494
1994-01-20 02:33:05 C 06 58 43.21 +48 17 23.1 557
1994-01-20 02:46:20 C 06 58 41.24 +48 17 17.1 557
1994-01-20 02:49:06 C 06 58 40.82 +48 17 15.8 557
1994-01-20 02:51:52 C 06 58 40.42 +48 17 14.5 557
1994-01-20 02:54:38 C 06 58 40.01 +48 17 13.2 557
1994-01-20 02:57:26 C 06 58 39.60 +48 17 12.0 557
1994-02-03 10:48:05 C 06 16 18.84 +44 23 53.9 z 568
1994-02-03 10:54:20 C 06 16 18.24 +44 23 48.3 z 568
1994-02-07 20:02:31 06 07 38.71 +42 48 47.0 m 494
1994-02-07 20:26:57 06 07 36.86 +42 48 24.7 m 494
1994-02-09 21:19:30 C 06 04 19.12 +42 02 34.1 z 046
1994-02-09 21:21:16 C 06 04 19.00 +42 02 32.4 z 046
1994-02-09 21:24:14 C 06 04 18.81 +42 02 29.6 z 046
1994-02-09 21:25:37 C 06 04 18.71 +42 02 28.2 z 046
1994-02-09 21:27:45 C 06 04 18.57 +42 02 26.2 z 046
1994-02-09 21:29:26 C 06 04 18.46 +42 02 24.6 z 046
1994-02-09 21:30:48 C 06 04 18.37 +42 02 23.3 z 046
1994-02-09 21:32:07 C 06 04 18.28 +42 02 21.9 z 046
1994-02-13 03:54:45 C 06 00 00.20 +40 47 41.8 z 689
1994-02-15 02:48:59 C 05 57 57.93 +40 02 37.7 z 801
1994-02-15 03:06:07 C 05 57 57.20 +40 02 20.9 z 801
1994-02-15 18:31:53 C 05 57 22.94 +39 47 31.2 z 557
1994-02-15 18:57:11 C 05 57 21.92 +39 47 07.0 z 557
1994-02-15 20:40:09 C 05 57 17.84 +39 45 28.0 z 557
1994-02-15 21:10:46 C 05 57 16.64 +39 44 58.1 z 557
1994-02-15 23:13:52 C 05 57 11.93 +39 42 57.7 z 557
1994-02-15 23:56:24 C 05 57 10.35 +39 42 15.8 z 557
1994-02-16 00:23:04 C 05 57 09.38 +39 41 49.6 z 557
1994-02-16 00:50:42 C 05 57 08.40 +39 41 22.1 z 557
1994-02-16 18:18:21 C 05 56 34.10 +39 24 43.7 15.9 z 560
1994-02-16 18:24:17 C 05 56 33.86 +39 24 37.7 z 560
1994-02-16 18:29:26 C 05 56 33.70 +39 24 32.8 z 560
1994-02-17 04:47:06 05 56 13.66 +39 14 43.5 711
1994-02-17 20:54:48 C 05 55 45.53 +38 59 13.3 z 046
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)