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
2008-10-09 01:19:22 C 02 28 32.09 +44 47 26.9 15.5 r 084
2008-10-09 06:56:04 C 02 27 49.32 +44 49 05.5 c 704
2008-10-09 07:14:32 C 02 27 46.83 +44 49 10.7 c 704
2008-10-09 07:33:02 C 02 27 44.35 +44 49 15.8 c 704
2008-10-09 07:51:29 C 02 27 41.83 +44 49 20.7 c 704
2008-10-09 08:10:00 C 02 27 39.24 +44 49 24.5 c 704
2008-10-12 19:01:37 C 02 16 38.38 +45 04 38.4 16.0 r 084
2008-10-12 19:04:49 C 02 16 37.95 +45 04 38.9 16.0 r 084
2008-10-12 21:37:11 C 02 16 17.22 +45 04 58.6 o 510
2008-10-12 21:39:42 C 02 16 16.89 +45 04 58.7 o 510
2008-10-12 21:42:13 C 02 16 16.55 +45 04 59.0 o 510
2008-10-15 03:12:14 C 02 08 56.02 +45 07 40.5 15.1 r 084
2008-10-15 03:15:27 C 02 08 55.55 +45 07 40.5 15.2 r 084
2008-10-17 01:13:40 C 02 02 37.38 +45 05 44.3 r H53
2008-10-17 01:14:56 C 02 02 37.17 +45 05 44.3 r H53
2008-10-17 01:16:19 C 02 02 36.99 +45 05 44.4 r H53
2008-10-17 01:17:37 C 02 02 36.75 +45 05 44.3 r H53
2008-10-17 01:20:38 C 02 02 36.37 +45 05 43.8 r H53
2008-10-17 01:22:12 C 02 02 36.16 +45 05 44.1 r H53
2008-10-19 19:32:19 C 01 53 30.85 +44 55 50.8 r A88
2008-10-19 19:40:04 C 01 53 29.75 +44 55 49.4 r A88
2008-10-19 19:47:14 C 01 53 28.77 +44 55 48.3 r A88
2008-10-19 19:54:46 C 01 53 27.73 +44 55 47.0 r A88
2008-10-19 20:02:32 C 01 53 26.65 +44 55 44.8 r A88
2008-10-19 20:09:14 C 01 53 25.78 +44 55 43.9 r A88
2008-10-20 17:10:30 C 01 50 34.70 +44 50 46.8 o 151
2008-10-20 17:11:26 C 01 50 34.57 +44 50 46.2 o 151
2008-10-20 17:13:18 C 01 50 34.30 +44 50 45.9 o 151
2008-10-20 17:14:14 C 01 50 34.17 +44 50 45.7 o 151
2008-10-20 17:15:10 C 01 50 34.02 +44 50 45.4 o 151
2008-10-20 17:16:06 C 01 50 33.86 +44 50 45.2 o 151
2008-10-22 19:05:27 C 01 43 53.94 +44 36 08.2 c 127
2008-10-22 19:10:41 C 01 43 53.26 +44 36 06.6 c 127
2008-10-22 19:20:08 C 01 43 51.98 +44 36 03.6 c 127
2008-10-22 19:30:35 C 01 43 50.59 +44 36 00.4 c 127
2008-10-22 19:52:44 C 01 43 47.27 +44 35 52.7 15.5 o 084
2008-10-22 19:55:56 C 01 43 46.80 +44 35 51.6 15.4 o 084
2008-10-23 03:09:56 C 01 42 50.13 +44 33 27.0 r H53
2008-10-23 03:12:48 C 01 42 49.78 +44 33 27.1 r H53
2008-10-23 03:18:05 C 01 42 48.95 +44 33 23.9 r H53
2008-10-23 03:21:33 C 01 42 48.55 +44 33 23.2 r H53
2008-10-23 03:22:48 C 01 42 48.30 +44 33 22.7 r H53
2008-10-23 03:26:34 C 01 42 47.84 +44 33 21.8 r H53
2008-10-23 18:50:07 C 01 40 47.39 +44 27 38.8 c 127
2008-10-23 19:05:43 C 01 40 45.32 +44 27 33.3 c 127
2008-10-23 19:10:45 C 01 40 44.67 +44 27 31.5 c 127
2008-10-23 20:21:56 C 01 40 34.84 +44 27 04.9 15.5 r 084
2008-10-23 20:25:09 C 01 40 34.38 +44 27 03.6 15.5 r 084
2008-10-23 20:26:07 C 01 40 34.56 +44 27 04.7 u C01
2008-10-23 20:26:59 C 01 40 34.44 +44 27 04.2 u C01
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)