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
2018-11-28 13:44:06 C 08 20 35.43 +44 34 54.9 U T08
2018-12-01 02:29:39 C 08 20 04.15 +45 04 11.2 V C95
2018-12-01 02:33:03 C 08 20 04.07 +45 04 13.2 V C95
2018-12-01 02:36:26 C 08 20 04.05 +45 04 14.7 V C95
2018-12-01 02:39:49 C 08 20 03.99 +45 04 16.4 V C95
2018-12-01 02:43:12 C 08 20 03.92 +45 04 18.1 V C95
2018-12-01 02:48:17 C 08 20 03.85 +45 04 20.6 V C95
2018-12-02 13:28:09 C 08 19 32.02 +45 21 37.2 U T08
2018-12-02 13:42:23 C 08 19 31.69 +45 21 44.6 U T08
2018-12-02 13:56:58 C 08 19 31.38 +45 21 51.7 U T08
2018-12-02 14:11:42 C 08 19 31.05 +45 21 59.2 U T08
2018-12-04 06:53:49 C 08 18 40.56 +45 42 28.0 V 703
2018-12-04 07:01:45 C 08 18 40.37 +45 42 32.3 V 703
2018-12-04 07:09:41 C 08 18 40.15 +45 42 36.5 V 703
2018-12-04 07:17:37 C 08 18 39.94 +45 42 40.9 V 703
2018-12-04 15:30:23 C 08 18 26.61 +45 46 56.4 U T05
2018-12-04 15:45:39 C 08 18 26.17 +45 47 04.1 U T05
2018-12-04 16:00:40 C 08 18 25.71 +45 47 11.8 U T05
2018-12-06 14:27:30 C 08 17 04.69 +46 11 09.3 U T08
2018-12-06 14:41:51 C 08 17 04.16 +46 11 16.7 U T08
2018-12-06 14:55:56 C 08 17 03.64 +46 11 23.7 U T08
2018-12-08 14:10:40 C 08 15 19.15 +46 36 01.8 U T05
2018-12-08 14:24:43 C 08 15 18.50 +46 36 09.1 U T05
2018-12-08 14:38:47 C 08 15 17.89 +46 36 16.5 U T05
2018-12-08 14:52:53 C 08 15 17.22 +46 36 23.4 U T05
2018-12-12 07:13:42 C 08 11 00.21 +47 22 32.4 U I41
2018-12-12 07:40:54 C 08 10 58.58 +47 22 47.2 U I41
2018-12-16 10:00:14 C 08 04 30.39 +48 13 03.8 U I41
2018-12-16 10:20:30 C 08 04 28.78 +48 13 13.9 U I41
2018-12-16 10:21:50 C 08 04 28.67 +48 13 14.5 U I41
2018-12-16 10:29:36 C 08 04 27.98 +48 13 18.4 V 703
2018-12-16 10:36:17 C 08 04 27.36 +48 13 21.8 V 703
2018-12-16 10:42:56 C 08 04 26.91 +48 13 24.9 V 703
2018-12-16 10:49:33 C 08 04 26.30 +48 13 28.8 V 703
2018-12-16 11:16:40 C 08 04 24.32 +48 13 41.5 U I41
2018-12-20 05:02:06 C 07 56 55.17 +48 56 27.3 V 703
2018-12-20 05:09:48 C 07 56 54.47 +48 56 31.1 V 703
2018-12-20 05:17:31 C 07 56 53.72 +48 56 34.7 V 703
2018-12-20 05:25:13 C 07 56 53.00 +48 56 38.5 V 703
2018-12-20 12:54:57 C 07 56 10.12 +49 00 07.7 V T05
2018-12-20 13:10:03 C 07 56 08.63 +49 00 14.3 V T05
2018-12-20 13:12:06 C 07 56 08.41 +49 00 15.2 V T05
2018-12-20 13:29:40 C 07 56 06.68 +49 00 22.9 V T05
2018-12-21 11:22:19 C 07 54 01.559 +49 10 01.68 U F51
2018-12-21 12:03:22 C 07 53 57.311 +49 10 19.78 U F51
2018-12-21 12:20:00 C 07 53 55.596 +49 10 26.98 U F51
2018-12-22 10:07:03 C 07 51 45.437 +49 19 40.66 U F51
2018-12-22 10:17:57 C 07 51 44.272 +49 19 45.42 U F51
2018-12-22 10:28:51 C 07 51 43.102 +49 19 50.20 U F51
2018-12-22 10:39:46 C 07 51 41.939 +49 19 54.89 U F51
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)