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
2018-12-28 12:30:23 C 07 34 53.43 +50 10 32.0 V T05
2018-12-28 12:46:23 C 07 34 51.30 +50 10 36.1 V T05
2018-12-28 13:01:06 C 07 34 49.29 +50 10 39.8 V T05
2018-12-28 13:14:09 C 07 34 47.61 +50 10 43.1 V T05
2018-12-28 13:27:36 C 07 34 45.83 +50 10 46.3 V T05
2018-12-29 21:14:30 C 07 30 39.70 +50 18 26.0 q A06
2018-12-29 21:22:07 C 07 30 38.68 +50 18 27.6 q A06
2018-12-29 21:29:44 C 07 30 37.63 +50 18 29.6 q A06
2019-01-04 05:02:53 C 07 12 47.06 +50 34 46.6 V 703
2019-01-04 05:10:39 C 07 12 45.91 +50 34 47.1 V 703
2019-01-04 05:18:23 C 07 12 44.73 +50 34 47.5 V 703
2019-01-04 05:26:08 C 07 12 43.57 +50 34 47.6 V 703
2019-01-05 11:54:28 C 07 08 13.35 +50 34 48.0 V T05
2019-01-05 12:11:33 C 07 08 10.73 +50 34 47.2 V T05
2019-01-05 12:24:17 C 07 08 08.76 +50 34 46.7 V T05
2019-01-05 12:35:31 C 07 08 07.04 +50 34 46.1 V T05
2019-01-07 01:47:47 C 07 02 36.23 +50 32 21.9 q W33
2019-01-07 01:53:11 C 07 02 35.41 +50 32 21.7 q W33
2019-01-07 01:58:37 C 07 02 34.57 +50 32 21.1 q W33
2019-01-08 06:00:48 C 06 58 21.60 +50 29 00.9 V 703
2019-01-08 06:09:29 C 06 58 20.41 +50 29 00.7 V 703
2019-01-08 06:18:11 C 06 58 19.05 +50 28 59.6 V 703
2019-01-08 06:26:56 C 06 58 17.69 +50 28 58.7 V 703
2019-01-09 05:57:46 C 06 54 45.92 +50 25 01.1 V G96
2019-01-09 06:05:14 C 06 54 44.76 +50 24 59.6 V G96
2019-01-09 06:12:42 C 06 54 43.61 +50 24 58.4 V G96
2019-01-09 06:20:09 C 06 54 42.44 +50 24 57.0 V G96
2019-01-09 12:19:00 C 06 53 47.57 +50 23 48.0 V T05
2019-01-09 12:30:09 C 06 53 45.83 +50 23 45.5 V T05
2019-01-09 13:15:30 C 06 53 38.81 +50 23 35.1 V T05
2019-01-11 00:48:08 C 06 48 20.37 +50 15 14.9 o Z22
2019-01-11 00:55:58 C 06 48 19.21 +50 15 14.0 o Z22
2019-01-11 04:53:49 C 06 47 44.49 +50 14 08.1 V 703
2019-01-11 05:01:33 C 06 47 43.30 +50 14 06.1 V 703
2019-01-11 05:09:16 C 06 47 42.15 +50 14 03.9 V 703
2019-01-11 10:37:46 C 06 46 52.34 +50 12 35.7 V T08
2019-01-11 10:55:13 C 06 46 49.65 +50 12 30.7 V T08
2019-01-11 11:06:33 C 06 46 47.90 +50 12 27.1 V T08
2019-01-11 11:07:13 C 06 46 47.79 +50 12 26.9 V T08
2019-01-11 11:16:39 C 06 46 46.35 +50 12 24.4 V T08
2019-01-11 11:18:44 C 06 46 46.01 +50 12 23.5 V T08
2019-01-11 11:34:47 C 06 46 43.54 +50 12 18.5 V T08
2019-01-15 10:41:21 C 06 32 52.03 +49 37 12.3 V T08
2019-01-15 10:55:36 C 06 32 49.94 +49 37 05.7 V T08
2019-01-15 10:57:35 C 06 32 49.64 +49 37 04.8 V T08
2019-01-15 11:10:55 C 06 32 47.68 +49 36 58.5 V T08
2019-01-16 00:23:37 C 06 30 57.57 +49 30 46.2 q W34
2019-01-16 00:36:10 C 06 30 55.80 +49 30 40.5 q W34
2019-01-16 00:53:34 C 06 30 53.30 +49 30 32.7 q W34
2019-01-16 01:11:40 C 06 30 50.70 +49 30 24.6 q W34
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)