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
2026-01-20 11:26:50 C 08 15 45.890 +45 17 04.13 Z U76
2026-01-20 12:16:03 C 08 15 38.350 +45 17 02.76 Z U76
2026-01-20 13:04:28 C 08 15 30.965 +45 17 01.07 Z U76
2026-01-20 19:03:41 C 08 14 39.226 +45 16 59.45 q D30
2026-01-20 19:46:22 C 08 14 32.690 +45 17 01.00 q D30
2026-01-20 20:29:06 C 08 14 26.105 +45 17 01.86 q D30
2026-01-20 20:29:41 B 08 14 26.011 +45 17 03.05 X M19
2026-01-20 20:37:54 B 08 14 24.718 +45 17 03.52 X M19
2026-01-20 20:47:08 B 08 14 23.285 +45 17 03.70 X M19
2026-01-20 20:56:20 B 08 14 21.869 +45 17 04.09 X M19
2026-01-20 21:09:12 C 08 14 19.901 +45 17 02.22 q D30
2026-01-20 21:46:37 C 08 14 14.150 +45 17 02.72 q D30
2026-01-20 22:24:02 C 08 14 08.333 +45 17 03.41 q D30
2026-01-21 06:33:52 C 08 12 54.256 +45 16 59.77 V 703
2026-01-21 06:37:13 C 08 12 53.730 +45 16 59.74 V 703
2026-01-21 06:40:34 C 08 12 53.197 +45 16 59.59 V 703
2026-01-21 06:43:52 C 08 12 52.686 +45 16 59.56 V 703
2026-01-21 10:49:54 C 08 12 14.880 +45 16 56.64 V T08
2026-01-21 10:54:31 C 08 12 14.155 +45 16 56.39 V T08
2026-01-21 11:02:25 C 08 12 12.876 +45 16 56.03 V T08
2026-01-21 11:52:49 C 08 12 04.896 +45 16 53.76 V T08
2026-01-21 17:51:34 C 08 11 10.182 +45 16 35.41 V D29
2026-01-21 18:58:53 C 08 10 59.560 +45 16 30.61 V D29
2026-01-21 19:19:15 C 08 10 56.354 +45 16 28.99 V D29
2026-01-21 19:19:29 C 08 10 57.99 +45 16 27.2 X C40
2026-01-21 19:21:25 C 08 10 57.66 +45 16 27.2 X C40
2026-01-21 19:23:21 C 08 10 57.37 +45 16 27.2 X C40
2026-01-21 19:25:18 C 08 10 57.03 +45 16 27.2 X C40
2026-01-21 19:27:07 C 08 10 56.77 +45 16 27.0 X C40
2026-01-21 19:28:50 C 08 10 56.47 +45 16 27.2 X C40
2026-01-21 19:30:33 C 08 10 56.24 +45 16 26.8 X C40
2026-01-21 19:32:16 C 08 10 55.97 +45 16 26.7 X C40
2026-01-21 19:33:59 C 08 10 55.67 +45 16 27.0 X C40
2026-01-21 19:37:25 C 08 10 55.16 +45 16 26.5 X C40
2026-01-21 19:37:57 C 08 10 55.447 +45 16 21.97 Z C23
2026-01-21 19:39:09 C 08 10 54.88 +45 16 26.8 X C40
2026-01-21 20:26:29 C 08 10 47.902 +45 16 20.86 Z C23
2026-01-22 12:34:30 C 08 08 17.712 +45 15 27.54 V T08
2026-01-22 12:39:46 C 08 08 16.867 +45 15 27.00 V T08
2026-01-22 12:55:41 C 08 08 14.333 +45 15 25.20 V T08
2026-01-22 13:04:54 C 08 08 12.847 +45 15 24.16 V T08
2026-01-25 02:14:00 B 07 58 42.281 +45 06 44.82 X J51
2026-01-25 02:17:54 B 07 58 41.662 +45 06 44.42 X J51
2026-01-25 02:21:21 B 07 58 41.098 +45 06 43.52 X J51
2026-01-25 19:32:41 C 07 56 00.679 +45 02 48.08 Z C23
2026-01-25 19:55:41 C 07 55 56.995 +45 02 43.30 Z C23
2026-01-25 20:24:24 C 07 55 52.387 +45 02 37.32 Z C23
2026-01-26 01:22:48 B 07 55 05.695 +45 01 39.94 Z X33
2026-01-26 01:25:21 B 07 55 05.234 +45 01 39.43 Z X33
2026-01-26 01:27:52 B 07 55 04.877 +45 01 38.75 Z X33
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)