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
2001-09-28 08:53:31 C 00 55 49.27 +37 00 33.2 14.6 453
2001-09-28 11:01:43 C 00 55 28.08 +37 00 23.3 14.4 453
2001-09-28 19:19:37 C 00 54 11.09 +36 59 37.9 d 151
2001-09-28 19:26:44 C 00 54 09.93 +36 59 37.3 d 151
2001-09-28 19:30:29 C 00 54 09.35 +36 59 37.5 d 151
2001-09-28 19:32:38 C 00 54 09.00 +36 59 37.3 d 151
2001-09-28 19:41:19 C 00 54 07.60 +36 59 37.0 d 151
2001-09-28 19:53:17 C 00 54 05.65 +36 59 36.4 d 151
2001-09-30 07:39:32 C 00 48 28.392 +36 55 24.96 g 689
2001-09-30 18:17:53 C 00 46 51.40 +36 53 23.0 d 151
2001-09-30 18:20:53 C 00 46 50.97 +36 53 22.4 d 151
2001-09-30 18:25:20 C 00 46 50.29 +36 53 21.9 d 151
2001-09-30 18:30:08 C 00 46 49.55 +36 53 21.0 d 151
2001-09-30 18:35:28 C 00 46 48.70 +36 53 20.4 d 151
2001-09-30 18:38:19 C 00 46 48.28 +36 53 20.0 d 151
2001-09-30 18:41:21 C 00 46 47.80 +36 53 19.5 d 151
2001-09-30 18:46:10 C 00 46 47.07 +36 53 18.9 d 151
2001-09-30 18:49:54 C 00 46 46.47 +36 53 18.4 d 151
2001-09-30 18:52:37 C 00 46 46.06 +36 53 17.7 d 151
2001-09-30 18:54:50 C 00 46 45.72 +36 53 17.5 d 151
2001-09-30 19:02:32 C 00 46 44.52 +36 53 16.4 d 151
2001-09-30 21:41:27 C 00 46 19.01 +36 52 47.6 o 084
2001-10-02 03:51:00 C 00 41 46.92 +36 46 08.1 c 642
2001-10-02 04:04:22 C 00 41 44.89 +36 46 05.3 c 642
2001-10-02 04:07:45 C 00 41 44.39 +36 46 04.6 c 642
2001-10-02 04:11:08 C 00 41 43.85 +36 46 03.8 c 642
2001-10-02 04:14:27 C 00 41 43.38 +36 46 03.0 c 642
2001-10-02 20:12:50 C 00 39 21.57 +36 41 49.5 c 185
2001-10-02 20:16:15 C 00 39 21.03 +36 41 48.8 c 185
2001-10-02 20:22:14 C 00 39 20.26 +36 41 47.5 c 185
2001-10-02 20:25:29 C 00 39 19.66 +36 41 46.5 c 185
2001-10-04 07:09:40 C 00 34 18.472 +36 30 59.18 g 689
2001-10-04 18:04:59 C 00 32 47.62 +36 26 55.3 d 151
2001-10-04 18:07:51 C 00 32 47.20 +36 26 54.4 d 151
2001-10-04 18:10:34 C 00 32 46.83 +36 26 53.4 d 151
2001-10-04 18:14:29 C 00 32 46.26 +36 26 51.5 d 151
2001-10-04 18:17:00 C 00 32 45.91 +36 26 51.3 d 151
2001-10-04 18:19:03 C 00 32 45.64 +36 26 50.5 d 151
2001-10-05 07:01:21 C 00 30 58.739 +36 22 15.86 g 689
2001-10-06 18:57:18 C 00 26 09.71 +36 07 15.2 d 151
2001-10-06 19:00:08 C 00 26 09.32 +36 07 14.1 d 151
2001-10-06 19:02:09 C 00 26 09.05 +36 07 13.1 d 151
2001-10-06 19:04:09 C 00 26 08.79 +36 07 12.3 d 151
2001-10-06 19:10:05 C 00 26 08.01 +36 07 09.8 d 151
2001-10-06 19:13:01 C 00 26 07.56 +36 07 08.6 d 151
2001-10-07 21:59:51 C 00 22 39.41 +35 54 51.7 c 185
2001-10-07 22:02:34 C 00 22 39.05 +35 54 50.4 c 185
2001-10-07 22:05:45 C 00 22 38.66 +35 54 49.1 c 185
2001-10-07 22:08:42 C 00 22 38.26 +35 54 47.5 c 185
2001-10-07 22:11:23 C 00 22 37.91 +35 54 46.1 c 185
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)