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
2004-10-16 10:18:59 C 06 19 12.96 +44 49 11.5 c 704
2004-10-25 09:02:04 C 06 23 01.12 +46 46 47.5 c 704
2004-10-25 09:18:57 C 06 23 01.05 +46 46 55.8 c 704
2004-10-25 09:35:50 C 06 23 01.24 +46 47 06.5 c 704
2004-10-25 09:52:43 C 06 23 01.28 +46 47 15.8 c 704
2004-10-25 10:09:37 C 06 23 01.31 +46 47 25.8 c 704
2004-10-28 20:50:23 C 06 23 03.87 +47 34 29.4 o 084
2004-10-30 21:53:58 C 06 22 39.81 +48 02 50.6 o 084
2004-11-02 19:44:05 C 06 21 30.35 +48 43 22.9 o 084
2004-11-03 07:41:22 C 06 21 14.14 +48 50 26.2 c 704
2004-11-03 07:58:48 C 06 21 13.69 +48 50 36.8 c 704
2004-11-03 08:16:16 C 06 21 13.27 +48 50 47.4 c 704
2004-11-03 08:33:46 C 06 21 12.81 +48 50 57.5 c 704
2004-11-03 08:51:09 C 06 21 12.27 +48 51 07.7 c 704
2004-11-06 10:10:16 C 06 19 01.75 +49 33 40.8 r H41
2004-11-06 10:14:26 C 06 19 01.56 +49 33 43.3 r H41
2004-11-06 10:16:13 C 06 19 01.50 +49 33 44.2 r H41
2004-11-06 10:17:57 C 06 19 01.41 +49 33 44.8 r H41
2004-11-06 23:38:56 C 06 18 32.79 +49 41 21.6 c A32
2004-11-06 23:45:25 C 06 18 32.58 +49 41 24.6 c A32
2004-11-06 23:52:11 C 06 18 32.19 +49 41 30.3 c A32
2004-11-10 08:15:28 C 06 14 56.91 +50 27 17.3 c 704
2004-11-10 08:32:50 C 06 14 55.95 +50 27 27.1 c 704
2004-11-10 08:50:11 C 06 14 54.96 +50 27 36.8 c 704
2004-11-10 09:07:33 C 06 14 53.99 +50 27 46.7 c 704
2004-11-10 09:25:03 C 06 14 53.01 +50 27 56.3 c 704
2004-11-12 21:23:17 C 06 11 27.78 +51 00 51.1 o A16
2004-11-12 21:33:37 C 06 11 27.13 +51 00 56.7 o A16
2004-11-12 21:43:54 C 06 11 26.47 +51 01 02.5 o A16
2004-11-12 21:53:58 C 06 11 25.81 +51 01 08.3 o A16
2004-11-12 22:04:08 C 06 11 25.16 +51 01 14.0 o A16
2004-11-18 22:32:00 C 06 00 26.16 +52 13 46.5 o 084
2004-11-20 09:26:10 C 05 57 12.58 +52 29 19.9 c 704
2004-11-20 09:44:03 C 05 57 10.80 +52 29 27.9 c 704
2004-11-20 10:01:56 C 05 57 08.96 +52 29 35.4 c 704
2004-11-20 10:19:49 C 05 57 07.23 +52 29 42.5 c 704
2004-11-21 05:01:25 C 05 55 17.87 +52 37 27.5 c A32
2004-11-21 05:04:38 C 05 55 17.53 +52 37 28.9 c A32
2004-11-21 05:09:30 C 05 55 17.08 +52 37 31.0 c A32
2004-11-22 23:41:02 C 05 50 55.92 +52 54 12.1 o 084
2004-11-25 06:50:37 C 05 44 49.87 +53 13 08.5 r H41
2004-11-25 06:55:20 C 05 44 49.32 +53 13 09.3 r H41
2004-11-25 07:02:05 C 05 44 48.48 +53 13 11.8 r H41
2004-11-25 07:04:46 C 05 44 48.15 +53 13 12.7 r H41
2004-11-26 00:56:35 C 05 42 42.89 +53 18 29.6 o 084
2004-11-30 06:16:07 C 05 30 04.99 +53 41 19.9 c 704
2004-11-30 06:33:54 C 05 30 02.52 +53 41 23.1 c 704
2004-11-30 06:51:47 C 05 30 00.09 +53 41 26.1 c 704
2004-11-30 07:10:02 C 05 29 57.59 +53 41 29.0 c 704
2004-12-02 08:01:50 C 05 23 25.14 +53 47 14.1 r H41
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)