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
2001-10-07 22:14:00 C 00 22 37.55 +35 54 44.9 c 185
2001-10-09 18:15:34 C 00 17 14.59 +35 32 18.0 d 151
2001-10-09 18:16:58 C 00 17 14.43 +35 32 17.2 d 151
2001-10-09 18:21:33 C 00 17 13.88 +35 32 14.8 d 151
2001-10-09 18:24:32 C 00 17 13.46 +35 32 13.7 d 151
2001-10-09 18:27:50 C 00 17 13.10 +35 32 11.9 d 151
2001-10-09 18:31:31 C 00 17 12.68 +35 32 10.7 d 151
2001-10-09 20:12:51 C 00 16 59.77 +35 31 15.0 o 084
2001-10-10 06:26:12 C 00 15 47.766 +35 25 51.76 g 689
2001-10-10 19:15:03 C 00 14 20.24 +35 18 37.3 d 151
2001-10-10 19:19:37 C 00 14 19.69 +35 18 35.0 d 151
2001-10-10 19:24:41 C 00 14 19.09 +35 18 32.1 d 151
2001-10-10 19:30:43 C 00 14 18.39 +35 18 28.8 d 151
2001-10-10 19:34:52 C 00 14 17.90 +35 18 26.7 d 151
2001-10-10 19:44:20 C 00 14 16.77 +35 18 21.6 d 151
2001-10-11 20:50:59 C 00 11 28.81 +35 03 54.7 c 127
2001-10-11 21:04:27 C 00 11 27.27 +35 03 46.6 c 127
2001-10-11 21:10:30 C 00 11 26.59 +35 03 43.4 c 127
2001-10-11 21:54:04 C 00 11 21.60 +35 03 20.3 a 233
2001-10-11 21:58:03 C 00 11 21.13 +35 03 17.9 a 233
2001-10-11 22:02:03 C 00 11 20.66 +35 03 15.9 a 233
2001-10-11 22:06:04 C 00 11 20.23 +35 03 13.3 a 233
2001-10-11 22:10:04 C 00 11 19.79 +35 03 10.8 a 233
2001-10-11 22:14:04 C 00 11 19.28 +35 03 08.2 a 233
2001-10-12 00:57:49 C 00 11 02.68 +35 01 26.5 i 726
2001-10-12 01:02:49 C 00 11 02.13 +35 01 23.4 i 726
2001-10-12 01:07:50 C 00 11 01.57 +35 01 20.4 i 726
2001-10-12 06:13:43 C 00 10 27.669 +34 58 27.59 g 689
2001-10-12 12:44:42 C 00 09 46.34 +34 54 32.8 355
2001-10-12 12:48:33 C 00 09 45.95 +34 54 31.0 355
2001-10-12 12:50:29 C 00 09 45.69 +34 54 29.0 355
2001-10-12 12:59:00 C 00 09 44.76 +34 54 24.4 355
2001-10-13 03:28:47 C 00 08 14.76 +34 45 28.3 c 642
2001-10-13 03:37:29 C 00 08 13.84 +34 45 23.2 c 642
2001-10-13 03:46:09 C 00 08 12.92 +34 45 18.1 c 642
2001-10-13 12:50:41 C 00 07 16.76 +34 39 48.5 349
2001-10-13 12:52:50 C 00 07 16.52 +34 39 47.0 349
2001-10-13 12:54:54 C 00 07 16.30 +34 39 46.1 349
2001-10-13 12:56:53 C 00 07 16.12 +34 39 44.7 349
2001-10-13 19:05:37 C 00 06 39.64 +34 35 47.7 c 113
2001-10-13 19:06:49 C 00 06 39.51 +34 35 47.0 c 113
2001-10-13 19:08:02 C 00 06 39.39 +34 35 46.3 c 113
2001-10-13 19:09:14 C 00 06 39.26 +34 35 45.6 c 113
2001-10-13 19:10:25 C 00 06 39.15 +34 35 44.7 c 113
2001-10-13 20:54:15 C 00 06 28.46 +34 34 42.9 c 203
2001-10-13 21:16:57 C 00 06 26.08 +34 34 28.8 c 203
2001-10-13 22:14:40 C 00 06 20.07 +34 33 53.0 c 203
2001-10-14 02:13:10 C 00 05 57.26 +34 31 19.9 i 726
2001-10-14 02:18:10 C 00 05 56.81 +34 31 17.5 i 726
2001-10-14 02:23:09 C 00 05 56.29 +34 31 13.9 i 726
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)