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
2015-09-21 03:48:28 C 04 12 33.12 +40 54 02.8 c A24
2015-09-26 02:41:47 C 04 12 02.38 +42 27 34.0 c A24
2015-09-26 02:42:50 C 04 12 02.35 +42 27 34.8 c A24
2015-09-26 03:44:16 C 04 12 01.43 +42 28 22.6 c A24
2015-09-26 03:45:19 C 04 12 01.41 +42 28 23.3 c A24
2015-09-27 08:24:22 C 04 11 37.60 +42 50 37.2 u H21
2015-09-27 08:26:14 C 04 11 37.55 +42 50 38.5 u H21
2015-09-27 08:28:12 C 04 11 37.53 +42 50 39.9 u H21
2015-09-27 08:30:09 C 04 11 37.48 +42 50 41.6 u H21
2015-09-27 08:32:07 C 04 11 37.45 +42 50 43.1 u H21
2015-09-27 08:34:19 C 04 11 37.39 +42 50 45.0 u H21
2015-10-19 22:59:35 C 03 39 31.10 +48 40 57.7 c A24
2015-10-19 23:00:37 C 03 39 31.00 +48 40 58.2 c A24
2015-10-20 00:00:56 C 03 39 24.48 +48 41 24.2 c A24
2015-10-20 00:01:58 C 03 39 24.38 +48 41 24.8 c A24
2015-10-20 23:57:29 C 03 36 51.84 +48 51 03.0 c A24
2015-10-20 23:58:31 C 03 36 51.70 +48 51 03.4 c A24
2015-10-21 00:58:26 C 03 36 44.96 +48 51 27.0 c A24
2015-10-21 00:59:29 C 03 36 44.89 +48 51 27.5 c A24
2015-10-21 08:52:25 C 03 35 53.09 +48 54 29.1 q H45
2015-10-21 08:54:11 C 03 35 52.89 +48 54 29.8 q H45
2015-10-21 08:55:54 C 03 35 52.69 +48 54 30.4 q H45
2015-10-21 08:57:05 C 03 35 52.56 +48 54 30.8 q H45
2015-10-21 08:58:15 C 03 35 52.43 +48 54 31.3 q H45
2015-10-23 05:09:43 C 03 30 55.25 +49 09 44.3 u H21
2015-10-23 05:11:41 C 03 30 55.01 +49 09 45.0 u H21
2015-10-23 05:13:39 C 03 30 54.80 +49 09 45.7 u H21
2015-10-23 05:15:36 C 03 30 54.56 +49 09 46.3 u H21
2015-10-23 05:17:34 C 03 30 54.32 +49 09 47.0 u H21
2015-10-23 05:21:29 C 03 30 53.87 +49 09 48.4 u H21
2015-10-23 05:23:27 C 03 30 53.62 +49 09 49.0 u H21
2015-10-23 05:25:24 C 03 30 53.38 +49 09 49.9 u H21
2015-10-23 05:29:20 C 03 30 52.93 +49 09 50.9 u H21
2015-10-23 05:31:17 C 03 30 52.68 +49 09 51.6 u H21
2015-10-23 05:35:13 C 03 30 52.22 +49 09 52.9 u H21
2015-10-23 05:37:10 C 03 30 52.00 +49 09 53.6 u H21
2015-10-23 05:39:08 C 03 30 51.76 +49 09 54.3 u H21
2015-10-23 05:41:05 C 03 30 51.53 +49 09 55.1 u H21
2015-10-23 05:43:03 C 03 30 51.28 +49 09 55.5 u H21
2015-10-23 05:45:01 C 03 30 51.04 +49 09 56.3 u H21
2015-10-23 05:49:31 C 03 30 50.51 +49 09 57.6 u H21
2015-10-23 05:51:29 C 03 30 50.27 +49 09 58.0 u H21
2015-10-23 05:53:56 C 03 30 49.97 +49 09 58.9 u H21
2015-10-23 17:35:30 C 03 29 28.01 +49 13 34.2 q D29
2015-10-23 18:00:54 C 03 29 24.91 +49 13 41.7 q D29
2015-10-23 18:24:46 C 03 29 22.00 +49 13 48.6 q D29
2015-10-26 03:38:57 C 03 22 29.53 +49 28 08.9 u H21
2015-10-26 03:41:53 C 03 22 29.15 +49 28 09.7 u H21
2015-10-26 03:44:50 C 03 22 28.79 +49 28 10.4 u H21
2015-10-26 03:47:46 C 03 22 28.43 +49 28 11.0 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)