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
2008-11-20 22:23:36 C 00 46 09.08 +36 52 28.2 c A24
2008-11-20 22:24:42 C 00 46 09.03 +36 52 27.3 c A24
2008-11-21 19:23:36 C 00 45 36.30 +36 37 09.0 16.9 o 084
2008-11-22 21:44:20 C 00 44 59.75 +36 18 17.5 c A24
2008-11-22 21:45:27 C 00 44 59.71 +36 18 16.7 c A24
2008-11-22 22:05:41 C 00 44 59.24 +36 18 02.0 c A24
2008-11-22 22:27:02 C 00 44 58.73 +36 17 46.6 c A24
2008-11-22 22:47:16 C 00 44 58.25 +36 17 31.8 c A24
2008-11-22 22:48:23 C 00 44 58.23 +36 17 31.0 c A24
2008-11-23 06:47:57 C 00 44 48.27 +36 11 52.7 c 704
2008-11-23 07:04:57 C 00 44 47.85 +36 11 40.5 c 704
2008-11-23 07:21:56 C 00 44 47.48 +36 11 27.8 c 704
2008-11-23 07:38:53 C 00 44 47.14 +36 11 15.6 c 704
2008-11-23 07:55:52 C 00 44 46.76 +36 11 03.0 c 704
2008-11-24 21:04:58 C 00 44 08.64 +35 45 05.3 c A24
2008-11-25 21:34:30 C 00 43 48.70 +35 28 19.7 c A24
2008-11-25 21:35:37 C 00 43 48.72 +35 28 18.9 c A24
2008-11-25 21:55:58 C 00 43 48.42 +35 28 04.9 c A24
2008-11-25 22:17:27 C 00 43 48.11 +35 27 50.2 c A24
2008-11-25 22:37:48 C 00 43 47.83 +35 27 35.9 c A24
2008-11-25 22:38:56 C 00 43 47.81 +35 27 35.5 c A24
2008-11-26 02:48:10 C 00 43 45.35 +35 24 49.4 r H53
2008-11-26 02:52:09 C 00 43 45.31 +35 24 46.8 r H53
2008-11-26 02:56:10 C 00 43 45.26 +35 24 44.1 r H53
2008-11-26 03:00:10 C 00 43 45.21 +35 24 41.4 r H53
2008-11-26 03:04:09 C 00 43 45.14 +35 24 38.5 r H53
2008-11-26 03:08:09 C 00 43 45.07 +35 24 36.0 r H53
2008-11-26 21:44:29 C 00 43 33.73 +35 12 05.7 r B75
2008-11-26 21:47:37 C 00 43 33.68 +35 12 03.6 r B75
2008-11-26 21:50:47 C 00 43 33.64 +35 12 01.7 r B75
2008-11-26 22:04:14 C 00 43 33.45 +35 11 52.5 c A24
2008-11-26 22:05:20 C 00 43 33.45 +35 11 51.8 c A24
2008-11-26 22:25:15 C 00 43 33.23 +35 11 38.3 c A24
2008-11-26 22:46:18 C 00 43 33.00 +35 11 24.0 c A24
2008-11-26 23:06:12 C 00 43 32.76 +35 11 10.5 c A24
2008-11-26 23:07:18 C 00 43 32.76 +35 11 09.7 c A24
2008-11-27 21:39:54 C 00 43 23.03 +34 56 20.6 c A24
2008-11-27 21:41:00 C 00 43 23.02 +34 56 19.8 c A24
2008-12-03 12:28:17 C 00 43 36.14 +33 33 47.6 m 355
2008-12-03 12:28:54 C 00 43 36.14 +33 33 47.5 m 355
2008-12-03 12:29:31 C 00 43 36.15 +33 33 46.9 m 355
2008-12-03 12:30:08 C 00 43 36.13 +33 33 46.7 m 355
2008-12-07 03:11:27 C 00 44 44.22 +32 46 36.1 c 704
2008-12-07 03:30:11 C 00 44 44.56 +32 46 26.3 c 704
2008-12-07 03:48:28 C 00 44 44.83 +32 46 16.8 c 704
2008-12-07 04:06:53 C 00 44 45.05 +32 46 07.1 c 704
2008-12-07 04:25:26 C 00 44 45.33 +32 45 57.5 c 704
2008-12-07 21:34:05 C 00 45 03.74 +32 37 09.1 c A24
2008-12-07 21:35:31 C 00 45 03.80 +32 37 08.2 c A24
2008-12-08 20:59:07 C 00 45 31.70 +32 25 29.7 a 233
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)