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
2015-10-26 03:50:43 C 03 22 28.05 +49 28 11.7 u H21
2015-10-26 03:53:39 C 03 22 27.69 +49 28 12.3 u H21
2015-10-26 03:56:36 C 03 22 27.33 +49 28 12.9 u H21
2015-10-26 03:59:32 C 03 22 26.96 +49 28 13.5 u H21
2015-10-26 04:02:28 C 03 22 26.57 +49 28 13.9 u H21
2015-10-26 04:05:25 C 03 22 26.18 +49 28 14.5 u H21
2015-10-26 04:08:22 C 03 22 25.82 +49 28 15.2 u H21
2015-10-26 04:11:18 C 03 22 25.44 +49 28 15.9 u H21
2015-10-26 04:14:14 C 03 22 25.09 +49 28 16.4 u H21
2015-10-26 04:17:16 C 03 22 24.71 +49 28 17.1 u H21
2015-10-26 05:58:05 C 03 22 11.80 +49 28 40.1 u H21
2015-10-26 06:00:05 C 03 22 11.54 +49 28 40.6 u H21
2015-10-26 06:02:06 C 03 22 11.29 +49 28 41.0 u H21
2015-10-26 06:04:27 C 03 22 10.98 +49 28 41.4 u H21
2015-10-26 06:06:40 C 03 22 10.68 +49 28 41.9 u H21
2015-10-26 06:08:43 C 03 22 10.43 +49 28 42.3 u H21
2015-10-26 06:10:44 C 03 22 10.17 +49 28 42.9 u H21
2015-10-26 06:12:53 C 03 22 09.91 +49 28 43.4 u H21
2015-10-26 06:14:57 C 03 22 09.63 +49 28 43.7 u H21
2015-10-26 06:16:57 C 03 22 09.38 +49 28 44.2 u H21
2015-10-26 06:18:57 C 03 22 09.11 +49 28 44.6 u H21
2015-10-26 06:20:58 C 03 22 08.85 +49 28 45.2 u H21
2015-10-26 06:22:58 C 03 22 08.61 +49 28 45.7 u H21
2015-10-26 06:24:59 C 03 22 08.36 +49 28 46.0 u H21
2015-10-26 06:26:59 C 03 22 08.09 +49 28 46.2 u H21
2015-10-26 06:29:00 C 03 22 07.82 +49 28 46.7 u H21
2015-10-26 06:31:00 C 03 22 07.57 +49 28 47.0 u H21
2015-10-26 06:33:00 C 03 22 07.29 +49 28 47.1 u H21
2015-10-26 06:35:36 C 03 22 06.93 +49 28 47.2 u H21
2015-10-26 07:13:04 C 03 22 02.17 +49 28 55.4 u H21
2015-10-26 07:16:10 C 03 22 01.76 +49 28 56.0 u H21
2015-10-26 07:20:18 C 03 22 01.22 +49 28 56.8 u H21
2015-10-26 07:22:22 C 03 22 00.97 +49 28 57.0 u H21
2015-10-26 07:24:26 C 03 22 00.66 +49 28 57.9 u H21
2015-10-26 07:26:30 C 03 22 00.44 +49 28 58.0 u H21
2015-10-26 07:28:34 C 03 22 00.15 +49 28 58.3 u H21
2015-10-26 07:30:38 C 03 21 59.88 +49 28 58.8 u H21
2015-10-26 07:32:42 C 03 21 59.59 +49 28 59.3 u H21
2015-10-26 07:34:46 C 03 21 59.35 +49 28 59.6 u H21
2015-10-26 07:36:50 C 03 21 59.10 +49 29 00.0 u H21
2015-10-26 07:38:54 C 03 21 58.80 +49 29 00.6 u H21
2015-10-27 07:11:40 C 03 19 02.54 +49 33 20.4 u 926
2015-10-27 07:30:06 C 03 19 00.14 +49 33 23.4 u 926
2015-10-27 07:48:57 C 03 18 57.64 +49 33 26.4 u 926
2015-10-27 19:47:20 C 03 17 27.08 +49 35 10.4 t L04
2015-10-27 19:49:49 C 03 17 26.75 +49 35 10.7 t L04
2015-10-27 19:56:57 C 03 17 25.83 +49 35 11.9 t L04
2015-10-29 04:49:04 C 03 13 11.68 +49 39 03.9 u H21
2015-10-29 04:51:23 C 03 13 11.38 +49 39 04.2 u H21
2015-10-29 04:53:21 C 03 13 11.13 +49 39 04.4 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)