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
2019-09-28 05:42:09 C 20 22 25.72 -02 50 57.2 V 654
2019-09-28 05:47:55 C 20 22 26.59 -02 50 49.0 V 654
2019-09-28 18:50:21 C 20 24 29.05 -02 32 33.2 q K73
2019-09-28 18:57:48 C 20 24 30.14 -02 32 23.0 q K73
2019-09-28 19:04:30 C 20 24 31.11 -02 32 13.9 q K73
2019-09-28 19:47:32 C 20 24 37.82 -02 31 14.8 q 006
2019-09-28 19:52:12 C 20 24 38.51 -02 31 08.0 q 006
2019-09-28 19:53:56 C 20 24 38.74 -02 31 05.6 q 006
2019-09-29 19:31:37 C 20 28 12.73 -01 59 19.7 q 006
2019-09-29 19:33:25 C 20 28 13.00 -01 59 17.5 q 006
2019-09-29 19:35:49 C 20 28 13.34 -01 59 14.1 q 006
2019-09-29 19:37:37 C 20 28 13.61 -01 59 11.7 q 006
2019-09-29 19:44:49 C 20 28 14.59 -01 59 02.7 q 006
2019-09-29 19:47:13 C 20 28 14.93 -01 58 59.5 q 006
2019-09-29 19:48:54 C 20 28 15.19 -01 58 57.2 q 006
2019-09-29 19:51:17 C 20 28 15.52 -01 58 54.0 q 006
2019-09-30 04:55:35 C 20 29 35.17 -01 47 06.2 V 654
2019-09-30 05:01:21 C 20 29 35.97 -01 46 58.7 V 654
2019-09-30 05:47:45 C 20 29 42.45 -01 45 59.2 V 654
2019-09-30 05:53:32 C 20 29 43.26 -01 45 51.8 V 654
2019-09-30 07:07:43 C 20 29 54.54 -01 44 10.3 V T08
2019-09-30 07:12:23 C 20 29 55.18 -01 44 04.3 V T08
2019-09-30 07:22:33 C 20 29 56.58 -01 43 51.3 V T08
2019-09-30 07:37:16 C 20 29 58.61 -01 43 32.7 V T08
2019-10-01 04:28:19 C 20 32 58.48 -01 17 39.9 V 654
2019-10-01 04:34:06 C 20 32 59.26 -01 17 32.8 V 654
2019-10-01 06:06:08 C 20 33 11.68 -01 15 40.8 V 654
2019-10-01 06:11:54 C 20 33 12.46 -01 15 33.8 V 654
2019-10-02 02:13:45 C 20 36 01.17 -00 51 45.1 V G96
2019-10-02 02:20:44 C 20 36 02.08 -00 51 36.6 V G96
2019-10-02 02:27:44 C 20 36 03.00 -00 51 28.4 V G96
2019-10-02 02:34:43 C 20 36 03.91 -00 51 20.3 V G96
2019-10-02 05:31:31 C 20 36 27.09 -00 47 56.8 V 654
2019-10-02 05:31:31 C 20 36 27.14 -00 47 56.2 V 654
2019-10-02 05:37:17 C 20 36 27.84 -00 47 50.1 V 654
2019-10-02 05:37:17 C 20 36 27.90 -00 47 49.6 V 654
2019-10-02 06:23:43 C 20 36 33.99 -00 46 56.0 V 654
2019-10-02 06:29:29 C 20 36 34.75 -00 46 49.3 V 654
2019-10-02 21:30:15 C 20 38 36.89 -00 29 50.4 q 160
2019-10-02 21:33:20 C 20 38 37.29 -00 29 46.9 q 160
2019-10-02 21:36:19 C 20 38 37.67 -00 29 43.6 q 160
2019-10-03 03:06:33 C 20 39 22.82 -00 23 33.6 V 654
2019-10-03 03:12:20 C 20 39 23.55 -00 23 27.2 V 654
2019-10-03 04:29:41 C 20 39 33.33 -00 22 01.9 V 654
2019-10-03 04:35:28 C 20 39 34.06 -00 21 55.5 V 654
2019-10-03 05:22:42 C 20 39 40.03 -00 21 03.6 V 654
2019-10-03 05:28:28 C 20 39 40.77 -00 20 57.2 V 654
2019-10-03 19:20:01 C 20 41 30.78 -00 05 59.5 q 160
2019-10-03 19:22:52 C 20 41 31.14 -00 05 56.4 q 160
2019-10-03 19:25:41 C 20 41 31.48 -00 05 53.7 q 160
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)