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
2008-10-23 20:27:51 C 01 40 34.33 +44 27 04.1 u C01
2008-10-24 01:53:19 C 01 39 51.01 +44 24 58.5 o 510
2008-10-24 01:58:19 C 01 39 50.35 +44 24 56.3 o 510
2008-10-24 02:00:49 C 01 39 50.02 +44 24 55.3 o 510
2008-10-24 19:08:53 C 01 37 39.41 +44 17 59.3 v J93
2008-10-24 19:10:43 C 01 37 39.21 +44 17 58.7 v J93
2008-10-24 19:14:46 C 01 37 38.64 +44 17 57.2 v J93
2008-10-25 20:34:41 C 01 34 26.91 +44 06 59.7 r J51
2008-10-25 20:46:07 C 01 34 25.49 +44 06 55.2 r J51
2008-10-25 20:51:50 C 01 34 24.78 +44 06 53.0 r J51
2008-10-26 02:11:53 C 01 33 43.13 +44 04 24.0 r J52
2008-10-26 02:23:03 C 01 33 41.72 +44 04 18.8 r J52
2008-10-26 02:30:20 C 01 33 40.78 +44 04 15.0 r J52
2008-10-26 22:36:35 C 01 31 12.78 +43 54 38.1 r 585
2008-10-26 22:44:49 C 01 31 11.80 +43 54 33.2 r 585
2008-10-26 22:51:55 C 01 31 10.91 +43 54 29.7 r 585
2008-10-26 22:59:01 C 01 31 09.94 +43 54 26.3 r 585
2008-10-27 04:11:45 C 01 30 33.21 +43 51 53.0 o G56
2008-10-27 04:17:59 C 01 30 32.55 +43 51 51.6 o G56
2008-10-27 04:24:12 C 01 30 31.46 +43 51 46.7 o G56
2008-10-29 04:25:56 C 01 24 50.79 +43 26 13.7 c H53
2008-10-29 04:27:33 C 01 24 50.56 +43 26 13.2 c H53
2008-10-29 04:29:47 C 01 24 50.34 +43 26 11.8 c H53
2008-10-29 04:35:36 C 01 24 49.62 +43 26 08.1 c H53
2008-10-29 04:39:10 C 01 24 49.20 +43 26 06.1 c H53
2008-10-29 04:40:36 C 01 24 49.04 +43 26 06.0 c H53
2008-10-30 02:53:12 C 01 22 18.62 +43 13 15.4 r H53
2008-10-30 02:55:21 C 01 22 18.38 +43 13 14.3 r H53
2008-10-30 02:57:13 C 01 22 18.16 +43 13 13.0 r H53
2008-10-30 02:59:11 C 01 22 17.94 +43 13 12.2 r H53
2008-10-30 03:01:00 C 01 22 17.70 +43 13 10.7 r H53
2008-10-30 03:02:53 C 01 22 17.53 +43 13 09.8 r H53
2008-10-31 05:02:00 C 01 19 26.36 +42 57 29.2 r 703
2008-10-31 05:12:52 C 01 19 25.14 +42 57 22.6 r 703
2008-10-31 05:24:04 C 01 19 23.88 +42 57 15.8 r 703
2008-10-31 05:35:19 C 01 19 22.62 +42 57 08.8 r 703
2008-11-02 18:20:21 C 01 13 08.48 +42 17 40.6 c J19
2008-11-02 18:29:46 C 01 13 07.52 +42 17 34.5 c J19
2008-11-02 18:39:13 C 01 13 06.57 +42 17 28.2 c J19
2008-11-06 22:07:07 C 01 04 10.41 +41 06 53.7 16.8 r 084
2008-11-06 22:10:20 C 01 04 10.16 +41 06 51.5 16.7 r 084
2008-11-07 04:43:49 C 01 03 38.85 +41 02 08.1 c 704
2008-11-07 05:01:06 C 01 03 37.39 +41 01 55.4 c 704
2008-11-07 05:18:28 C 01 03 35.92 +41 01 43.2 c 704
2008-11-07 05:35:41 C 01 03 34.46 +41 01 29.6 c 704
2008-11-07 05:53:02 C 01 03 32.99 +41 01 16.8 c 704
2008-11-07 20:24:57 C 01 02 24.49 +40 50 21.9 15.8 r 084
2008-11-07 20:28:10 C 01 02 24.32 +40 50 20.5 15.9 r 084
2008-11-08 03:23:49 C 01 01 52.96 +40 45 15.6 r 703
2008-11-08 03:41:17 C 01 01 51.52 +40 45 02.1 r 703
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)