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
2004-12-20 20:35:27 C 04 23 02.33 +51 46 06.0 c A62
2004-12-20 20:37:26 C 04 23 02.10 +51 46 05.1 c A62
2004-12-20 20:37:37 C 04 23 02.09 +51 46 05.4 o 185
2004-12-20 20:39:25 C 04 23 01.88 +51 46 03.8 c A62
2004-12-20 20:40:17 C 04 23 01.76 +51 46 03.2 c A62
2004-12-20 20:43:09 C 04 23 01.47 +51 46 03.3 o 185
2004-12-29 20:02:17 C 04 01 39.39 +49 17 26.1 o A32
2004-12-29 20:10:24 C 04 01 38.69 +49 17 19.9 o A32
2004-12-29 20:18:30 C 04 01 38.04 +49 17 14.1 o A32
2004-12-29 20:26:37 C 04 01 37.37 +49 17 07.8 o A32
2004-12-29 20:33:06 C 04 01 36.83 +49 17 02.2 o A32
2004-12-30 19:37:01 C 03 59 48.98 +48 59 21.1 r 160
2004-12-30 19:39:55 C 03 59 48.74 +48 59 19.0 r 160
2004-12-30 19:43:12 C 03 59 48.48 +48 59 16.2 r 160
2004-12-30 19:45:04 C 03 59 48.33 +48 59 15.0 r 160
2004-12-30 19:46:55 C 03 59 48.14 +48 59 13.6 r 160
2004-12-30 19:49:10 C 03 59 48.01 +48 59 11.8 r 160
2004-12-30 19:51:51 C 03 59 47.78 +48 59 09.8 r 160
2004-12-30 19:53:43 C 03 59 47.61 +48 59 08.1 r 160
2004-12-30 19:55:34 C 03 59 47.51 +48 59 07.4 r 160
2004-12-30 19:57:24 C 03 59 47.34 +48 59 05.5 r 160
2004-12-30 19:59:15 C 03 59 47.20 +48 59 04.0 r 160
2004-12-30 23:22:00 C 03 59 31.24 +48 56 26.8 r 170
2004-12-30 23:25:41 C 03 59 30.91 +48 56 24.2 r 170
2004-12-30 23:28:07 C 03 59 30.74 +48 56 21.8 r 170
2004-12-31 21:47:43 C 03 57 52.74 +48 38 55.8 o 084
2005-01-01 23:01:57 C 03 56 08.14 +48 19 08.7 r A30
2005-01-01 23:04:08 C 03 56 07.99 +48 19 06.9 r A30
2005-01-01 23:07:41 C 03 56 07.72 +48 19 04.2 r A30
2005-01-01 23:17:32 C 03 56 07.09 +48 18 55.7 r A30
2005-01-03 20:55:32 C 03 53 16.03 +47 42 42.9 r 160
2005-01-03 20:58:19 C 03 53 15.85 +47 42 41.0 r 160
2005-01-03 21:02:14 C 03 53 15.58 +47 42 37.9 r 160
2005-01-03 21:05:27 C 03 53 15.42 +47 42 34.8 r 160
2005-01-03 21:07:57 C 03 53 15.24 +47 42 33.0 r 160
2005-01-03 21:11:05 C 03 53 15.03 +47 42 30.3 r 160
2005-01-08 02:35:11 C 03 48 12.31 +46 21 08.9 o 084
2005-01-11 18:52:59 C 03 45 13.42 +45 11 10.0 r 151
2005-01-11 18:57:34 C 03 45 13.30 +45 11 06.2 r 151
2005-01-11 23:57:10 C 03 45 04.70 +45 07 05.6 o 084
2005-01-14 03:52:05 C 03 43 56.09 +44 26 52.6 r H41
2005-01-14 03:54:50 C 03 43 56.03 +44 26 50.5 r H41
2005-01-14 03:57:40 C 03 43 55.97 +44 26 48.4 r H41
2005-01-14 04:01:18 C 03 43 55.89 +44 26 45.7 r H41
2005-01-14 20:59:53 C 03 43 38.73 +44 13 42.4 r 240
2005-01-14 21:02:57 C 03 43 38.68 +44 13 40.0 r 240
2005-01-14 21:06:03 C 03 43 38.62 +44 13 37.5 r 240
2005-01-14 21:12:16 C 03 43 38.51 +44 13 32.7 r 240
2005-01-14 21:15:21 C 03 43 38.46 +44 13 30.4 r 240
2005-01-14 21:20:00 C 03 43 38.38 +44 13 26.6 r 240
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)