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
2023-03-04 03:21:33 C 03 51 06.340 +32 47 43.51 V 703
2023-03-04 03:29:51 C 03 51 07.110 +32 47 43.44 V 703
2023-03-04 03:38:09 C 03 51 07.823 +32 47 42.22 V 703
2023-03-04 03:46:27 C 03 51 08.485 +32 47 40.09 V 703
2023-03-05 12:16:15 C 03 54 00.04 +32 43 14.7 V D29
2023-03-05 12:26:42 C 03 54 01.00 +32 43 14.4 V D29
2023-03-05 12:37:09 C 03 54 01.89 +32 43 12.4 V D29
2023-03-06 15:57:23 C 03 56 27.53 +32 39 35.0 Z C97
2023-03-06 16:04:27 C 03 56 28.20 +32 39 33.8 Z C97
2023-03-06 16:11:21 C 03 56 28.78 +32 39 32.9 Z C97
2023-03-13 12:21:53 C 04 11 27.99 +32 18 08.3 V D29
2023-03-13 12:42:15 C 04 11 29.89 +32 18 05.8 V D29
2023-03-13 13:02:36 C 04 11 31.75 +32 18 03.0 V D29
2023-03-14 11:34:25 C 04 13 38.43 +32 15 09.0 V D29
2023-03-14 11:54:47 C 04 13 40.33 +32 15 06.4 V D29
2023-03-14 12:15:09 C 04 13 42.22 +32 15 04.2 V D29
2023-03-15 05:51:03 C 04 15 21.612 +32 12 48.67 V T05
2023-03-15 05:55:42 C 04 15 22.070 +32 12 48.24 V T05
2023-03-15 06:24:23 C 04 15 24.732 +32 12 44.10 V T05
2023-03-15 06:32:51 C 04 15 25.534 +32 12 42.41 V T05
2023-03-15 11:36:02 C 04 15 54.19 +32 12 02.5 V D29
2023-03-15 12:03:55 C 04 15 56.83 +32 11 58.6 V D29
2023-03-15 12:24:17 C 04 15 58.71 +32 11 55.6 V D29
2023-04-07 05:44:16 C 05 10 43.068 +30 50 26.81 V T05
2023-04-07 05:49:34 C 05 10 43.673 +30 50 25.73 V T05
2023-04-07 05:57:24 C 05 10 44.453 +30 50 24.43 V T05
2023-04-07 06:14:31 C 05 10 46.270 +30 50 21.23 V T05
2023-04-15 06:29:31 C 05 31 21.902 +30 11 37.28 V T05
2023-04-15 06:35:30 C 05 31 22.649 +30 11 36.89 V T05
2023-04-15 06:52:20 C 05 31 24.425 +30 11 32.39 V T05
2023-04-15 07:01:36 C 05 31 25.450 +30 11 30.16 V T05
2023-04-17 06:19:39 C 05 36 34.908 +30 00 48.35 V T05
2023-04-17 06:33:49 C 05 36 36.408 +30 00 45.61 V T05
2023-04-17 06:38:32 C 05 36 36.977 +30 00 44.46 V T05
2023-04-17 06:46:43 C 05 36 37.829 +30 00 42.55 V T05
2023-04-18 19:52:05 C 05 40 42.010 +29 51 55.37 V A16
2023-04-18 20:12:04 C 05 40 44.143 +29 51 51.41 V A16
2023-04-18 20:33:38 C 05 40 46.562 +29 51 44.96 V A16
2023-04-21 07:00:58 C 05 47 13.594 +29 37 20.03 V T05
2023-04-21 07:05:37 C 05 47 14.136 +29 37 18.95 V T05
2023-04-21 07:14:51 C 05 47 15.122 +29 37 16.43 V T05
2023-04-21 07:33:57 C 05 47 17.194 +29 37 11.39 V T05
2023-10-02 23:41:12 C 15 32 31.608 -26 15 46.26 V W68
2023-10-02 23:45:46 C 15 32 32.750 -26 15 47.99 V W68
2023-10-02 23:53:35 C 15 32 34.582 -26 15 51.80 V W68
2023-10-03 00:21:45 C 15 32 41.321 -26 16 04.30 V W68
2023-10-20 23:55:01 C 17 18 09.559 -26 59 53.88 V W68
2023-10-20 23:59:34 C 17 18 10.656 -26 59 52.62 V W68
2023-10-21 00:07:25 C 17 18 12.542 -26 59 50.53 V W68
2023-10-21 00:21:37 C 17 18 15.926 -26 59 46.90 V W68
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)