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
2023-11-08 00:33:57 C 18 56 09.948 -23 07 21.58 V W68
2023-11-08 00:38:35 C 18 56 10.927 -23 07 18.16 V W68
2023-11-08 00:49:49 C 18 56 13.248 -23 07 09.30 V W68
2023-11-08 01:07:06 C 18 56 16.855 -23 06 55.76 V W68
2023-11-09 18:34:14 C 19 04 50.926 -22 34 25.28 V M22
2023-11-09 18:38:49 C 19 04 51.864 -22 34 21.86 V M22
2023-11-09 18:46:45 C 19 04 53.510 -22 34 15.35 V M22
2023-11-14 00:44:44 C 19 25 17.590 -21 09 13.72 V W68
2023-11-14 00:49:18 C 19 25 18.466 -21 09 09.79 V W68
2023-11-14 00:58:32 C 19 25 20.268 -21 09 01.69 V W68
2023-11-14 01:14:24 C 19 25 23.345 -21 08 47.94 V W68
2023-12-03 01:31:16 C 20 45 32.987 -13 58 20.35 V 703
2023-12-03 01:34:09 C 20 45 33.476 -13 58 17.54 V 703
2023-12-03 01:37:01 C 20 45 33.991 -13 58 14.81 V 703
2023-12-03 01:39:53 C 20 45 34.430 -13 58 12.32 V 703
2023-12-07 01:23:47 C 21 00 21.794 -12 24 05.15 V 703
2023-12-07 01:26:44 C 21 00 22.266 -12 24 03.02 V 703
2023-12-07 01:29:41 C 21 00 22.655 -12 23 59.96 V 703
2023-12-09 01:21:17 C 21 07 33.064 -11 37 00.26 V 703
2023-12-09 01:24:11 C 21 07 33.395 -11 36 56.59 V 703
2023-12-09 01:27:04 C 21 07 33.859 -11 36 54.11 V 703
2023-12-09 01:29:59 C 21 07 34.306 -11 36 50.98 V 703
2023-12-11 01:38:02 C 21 14 38.659 -10 49 41.38 V 703
2023-12-11 01:41:23 C 21 14 39.080 -10 49 37.85 V 703
2023-12-11 01:44:44 C 21 14 39.628 -10 49 35.83 V 703
2023-12-11 01:48:05 C 21 14 40.157 -10 49 31.91 V 703
2023-12-26 05:34:18 C 22 04 13.505 -05 00 57.20 V T05
2023-12-26 05:38:21 C 22 04 14.009 -05 00 53.03 V T05
2023-12-26 05:48:50 C 22 04 15.346 -05 00 43.85 V T05
2023-12-26 06:03:27 C 22 04 17.198 -05 00 30.24 V T05
2023-12-29 01:46:16 C 22 12 52.135 -03 57 45.83 V 703
2023-12-29 01:49:32 C 22 12 52.538 -03 57 43.09 V 703
2023-12-29 01:52:47 C 22 12 52.938 -03 57 39.60 V 703
2023-12-29 01:56:03 C 22 12 53.399 -03 57 37.15 V 703
2024-01-01 05:18:41 C 22 22 14.702 -02 48 39.56 V T08
2024-01-01 05:19:21 C 22 22 14.798 -02 48 38.84 V T08
2024-01-01 05:23:20 C 22 22 15.290 -02 48 34.99 V T08
2024-01-01 05:24:40 C 22 22 15.473 -02 48 34.06 V T08
2024-01-01 05:32:50 C 22 22 16.466 -02 48 26.75 V T08
2024-01-01 05:33:30 C 22 22 16.538 -02 48 26.21 V T08
2024-01-01 05:51:01 C 22 22 18.655 -02 48 10.08 V T08
2024-01-01 05:52:21 C 22 22 18.814 -02 48 08.68 V T08
2024-01-03 02:13:55 C 22 27 43.880 -02 08 03.84 V 703
2024-01-03 02:17:15 C 22 27 44.330 -02 08 00.38 V 703
2024-01-03 02:20:35 C 22 27 44.737 -02 07 57.50 V 703
2024-01-03 02:23:55 C 22 27 45.176 -02 07 55.31 V 703
2024-01-05 05:11:53 C 22 33 52.865 -01 22 24.24 V T08
2024-01-05 05:15:53 C 22 33 53.395 -01 22 21.07 V T08
2024-01-05 05:24:47 C 22 33 54.391 -01 22 12.83 V T08
2024-01-05 05:39:05 C 22 33 56.110 -01 22 00.16 V T08
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)