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
2019-09-24 03:38:09 C 20 05 41.47 -05 27 46.4 V 654
2019-09-24 03:38:09 C 20 05 41.48 -05 27 46.4 V 654
2019-09-24 04:54:57 C 20 05 55.12 -05 25 29.0 V 654
2019-09-24 04:54:57 C 20 05 54.97 -05 25 30.6 V 654
2019-09-24 05:00:43 C 20 05 56.15 -05 25 18.7 V 654
2019-09-24 05:00:43 C 20 05 56.00 -05 25 20.2 V 654
2019-09-24 05:44:04 C 20 06 05.195 -05 23 54.40 U F51
2019-09-24 06:00:23 C 20 06 08.062 -05 23 25.42 U F51
2019-09-24 06:16:40 C 20 06 10.903 -05 22 55.62 U F51
2019-09-24 06:21:07 C 20 06 10.48 -05 22 55.0 V 654
2019-09-24 06:26:53 C 20 06 11.52 -05 22 44.7 V 654
2019-09-24 07:33:22 C 20 06 24.41 -05 20 40.1 V T05
2019-09-24 07:38:23 C 20 06 25.29 -05 20 31.2 V T05
2019-09-24 08:07:14 C 20 06 30.37 -05 19 39.9 V T05
2019-09-24 19:21:02 C 20 08 34.80 -05 00 12.8 q 006
2019-09-24 19:23:10 C 20 08 35.18 -05 00 09.2 q 006
2019-09-24 19:25:18 C 20 08 35.55 -05 00 05.2 q 006
2019-09-24 19:27:26 C 20 08 35.92 -05 00 01.5 q 006
2019-09-24 19:29:34 C 20 08 36.30 -04 59 58.3 q 006
2019-09-24 19:31:42 C 20 08 36.65 -04 59 54.2 q 006
2019-09-24 19:33:50 C 20 08 37.01 -04 59 50.6 q 006
2019-09-24 19:35:58 C 20 08 37.39 -04 59 47.0 q 006
2019-09-24 20:09:08 C 20 08 42.72 -04 58 49.5 q K73
2019-09-24 20:15:19 C 20 08 43.79 -04 58 38.7 q K73
2019-09-25 05:49:37 C 20 10 26.29 -04 42 18.6 V 654
2019-09-25 05:55:23 C 20 10 27.27 -04 42 08.9 V 654
2019-09-25 07:04:14 C 20 10 39.04 -04 40 12.8 V 654
2019-09-25 07:10:00 C 20 10 40.03 -04 40 03.1 V 654
2019-09-26 03:27:09 C 20 14 13.29 -04 06 50.3 V 654
2019-09-26 03:32:55 C 20 14 14.23 -04 06 41.1 V 654
2019-09-26 19:32:23 C 20 16 55.53 -03 41 38.7 q 160
2019-09-26 19:35:14 C 20 16 55.98 -03 41 34.3 q 160
2019-09-26 19:38:02 C 20 16 56.40 -03 41 30.2 q 160
2019-09-26 19:42:36 C 20 16 57.36 -03 41 22.3 q 006
2019-09-26 19:44:52 C 20 16 57.70 -03 41 19.1 q 006
2019-09-26 19:47:09 C 20 16 58.09 -03 41 15.2 q 006
2019-09-26 19:48:50 C 20 16 58.37 -03 41 12.4 q 006
2019-09-26 19:51:40 C 20 16 58.86 -03 41 08.1 q 006
2019-09-26 19:53:22 C 20 16 59.10 -03 41 05.5 q 006
2019-09-26 19:56:12 C 20 16 59.53 -03 41 01.3 q 006
2019-09-26 19:58:28 C 20 16 59.92 -03 40 57.4 q 006
2019-09-27 04:33:55 C 20 18 24.54 -03 27 49.2 V 654
2019-09-27 04:39:41 C 20 18 25.43 -03 27 40.5 V 654
2019-09-27 17:58:57 C 20 20 35.49 -03 07 55.5 q K73
2019-09-27 18:08:30 C 20 20 36.96 -03 07 41.5 q K73
2019-09-28 04:34:47 C 20 22 15.77 -02 52 32.0 V 654
2019-09-28 04:34:47 C 20 22 15.61 -02 52 33.5 V 654
2019-09-28 04:40:34 C 20 22 16.64 -02 52 23.7 V 654
2019-09-28 04:40:34 C 20 22 16.48 -02 52 25.2 V 654
2019-09-28 05:42:09 C 20 22 25.72 -02 50 57.3 V 654
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)