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
2015-11-16 18:43:18 C 02 16 00.73 +47 33 11.1 q K73
2015-11-16 19:44:57 C 02 15 53.75 +47 32 34.7 q K73
2015-11-17 19:22:41 C 02 13 20.63 +47 17 54.9 q K73
2015-11-17 21:15:00 C 02 13 08.22 +47 16 44.9 q K73
2015-11-18 20:26:32 C 02 10 43.49 +47 01 45.9 r 006
2015-11-18 20:34:29 C 02 10 42.67 +47 01 40.9 r 006
2015-11-18 20:43:11 C 02 10 41.71 +47 01 35.1 r 006
2015-11-18 20:50:50 C 02 10 40.91 +47 01 30.2 r 006
2015-11-19 20:15:40 C 02 08 19.62 +46 45 53.0 r 006
2015-11-19 20:23:39 C 02 08 18.79 +46 45 47.9 r 006
2015-11-19 20:32:20 C 02 08 17.89 +46 45 42.0 r 006
2015-11-19 20:39:39 C 02 08 17.16 +46 45 37.2 r 006
2015-11-23 04:11:15 C 02 00 56.22 +45 49 27.9 u H21
2015-11-23 04:13:47 C 02 00 55.99 +45 49 26.2 u H21
2015-11-23 04:16:36 C 02 00 55.73 +45 49 24.2 u H21
2015-11-23 04:19:11 C 02 00 55.51 +45 49 22.2 u H21
2015-11-23 04:21:18 C 02 00 55.32 +45 49 20.6 u H21
2015-11-23 04:23:22 C 02 00 55.13 +45 49 19.1 u H21
2015-11-23 04:25:26 C 02 00 54.95 +45 49 17.6 u H21
2015-11-23 04:27:30 C 02 00 54.77 +45 49 16.2 u H21
2015-11-23 04:29:34 C 02 00 54.58 +45 49 14.6 u H21
2015-11-23 04:31:38 C 02 00 54.40 +45 49 12.9 u H21
2015-11-23 04:33:48 C 02 00 54.20 +45 49 11.4 u H21
2015-11-23 04:36:20 C 02 00 53.97 +45 49 09.5 u H21
2015-11-23 04:39:06 C 02 00 53.72 +45 49 07.6 u H21
2015-11-23 04:42:26 C 02 00 53.43 +45 49 05.1 u H21
2015-11-24 01:30:36 C 01 59 09.28 +45 33 43.2 u H21
2015-11-24 01:32:36 C 01 59 09.11 +45 33 41.7 u H21
2015-11-24 01:34:37 C 01 59 08.95 +45 33 40.2 u H21
2015-11-24 01:36:37 C 01 59 08.77 +45 33 38.8 u H21
2015-11-24 01:38:37 C 01 59 08.60 +45 33 37.2 u H21
2015-11-24 01:40:38 C 01 59 08.43 +45 33 35.9 u H21
2015-11-24 01:42:38 C 01 59 08.25 +45 33 34.3 u H21
2015-11-24 01:44:39 C 01 59 08.08 +45 33 33.0 u H21
2015-11-24 01:46:39 C 01 59 07.91 +45 33 31.6 u H21
2015-11-24 01:48:40 C 01 59 07.73 +45 33 30.1 u H21
2015-11-24 01:50:40 C 01 59 07.56 +45 33 28.7 u H21
2015-11-24 01:52:39 C 01 59 07.40 +45 33 27.1 u H21
2015-11-24 01:54:39 C 01 59 07.21 +45 33 25.7 u H21
2015-11-24 01:56:39 C 01 59 07.05 +45 33 24.2 u H21
2015-11-24 01:58:39 C 01 59 06.88 +45 33 22.6 u H21
2015-11-24 02:00:27 C 01 59 06.73 +45 33 21.5 u H21
2015-11-25 02:38:18 C 01 57 08.14 +45 14 54.8 u H21
2015-11-25 02:41:15 C 01 57 07.89 +45 14 52.5 u H21
2015-11-25 02:44:11 C 01 57 07.61 +45 14 50.5 u H21
2015-11-25 02:47:08 C 01 57 07.37 +45 14 48.4 u H21
2015-11-25 02:50:04 C 01 57 07.13 +45 14 46.1 u H21
2015-11-25 03:13:28 C 01 57 05.28 +45 14 28.6 u H21
2015-11-25 03:16:28 C 01 57 05.05 +45 14 26.4 u H21
2015-11-25 03:19:29 C 01 57 04.77 +45 14 24.0 u H21
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)