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
2001-09-15 06:13:58 C 01 47 24.36 +35 16 26.2 c 642
2001-09-15 06:18:58 C 01 47 23.54 +35 16 29.9 c 642
2001-09-15 09:35:15 C 01 46 51.286 +35 19 02.45 g 689
2001-09-15 22:00:59 C 01 44 54.14 +35 27 37.0 c 130
2001-09-15 22:07:59 C 01 44 52.84 +35 27 42.0 c 130
2001-09-15 22:14:00 C 01 44 51.93 +35 27 46.2 c 130
2001-09-15 22:19:30 C 01 44 51.08 +35 27 50.4 c 130
2001-09-16 03:35:51 C 01 44 01.00 +35 31 39.6 14.1 306
2001-09-16 03:51:32 C 01 43 58.30 +35 31 51.1 14.1 306
2001-09-16 03:55:21 C 01 43 57.73 +35 31 53.6 13.9 306
2001-09-16 04:07:20 C 01 43 55.68 +35 32 02.2 14.3 306
2001-09-16 04:12:02 C 01 43 54.97 +35 32 05.3 14.4 306
2001-09-18 09:13:46 C 01 35 18.166 +36 04 04.23 g 689
2001-09-18 16:13:22 C 01 34 09.41 +36 07 47.1 349
2001-09-18 16:15:17 C 01 34 09.07 +36 07 47.8 349
2001-09-18 16:17:27 C 01 34 08.72 +36 07 49.1 349
2001-09-18 16:19:25 C 01 34 08.37 +36 07 50.1 349
2001-09-19 09:05:11 C 01 31 22.733 +36 16 12.77 g 689
2001-09-20 08:56:57 C 01 27 25.740 +36 26 54.09 g 689
2001-09-20 19:13:34 C 01 25 44.36 +36 30 48.0 o 084
2001-09-21 21:21:44 C 01 21 22.93 +36 40 12.2 o 084
2001-09-24 03:39:12 C 01 12 22.02 +36 53 59.1 c 642
2001-09-24 03:43:36 C 01 12 21.29 +36 54 00.2 c 642
2001-09-24 03:47:56 C 01 12 20.58 +36 54 01.1 c 642
2001-09-24 06:36:12 C 01 11 51.99 +36 54 46.7 15.7 i 704
2001-09-24 06:57:33 C 01 11 48.29 +36 54 51.1 15.4 i 704
2001-09-24 07:19:05 C 01 11 44.56 +36 54 55.0 15.2 i 704
2001-09-24 07:42:14 C 01 11 40.53 +36 54 59.0 14.9 i 704
2001-09-25 08:18:39 C 01 07 36.383 +36 58 32.03 g 689
2001-09-26 21:22:15 C 01 01 33.344 +37 00 59.51 c 195
2001-09-26 21:31:45 C 01 01 31.726 +37 01 00.56 c 195
2001-09-26 21:38:06 C 01 01 30.796 +37 01 01.21 c 195
2001-09-26 21:46:56 C 01 01 29.82 +37 01 02.4 c 938
2001-09-26 21:50:13 C 01 01 29.27 +37 01 02.5 c 938
2001-09-26 21:53:27 C 01 01 28.72 +37 01 02.5 c 938
2001-09-26 21:56:44 C 01 01 28.18 +37 01 02.9 c 938
2001-09-26 21:59:55 C 01 01 27.66 +37 01 03.0 c 938
2001-09-26 22:55:33 C 01 01 18.32 +37 01 06.1 c 938
2001-09-26 22:58:47 C 01 01 17.56 +37 01 06.0 c 938
2001-09-26 23:02:02 C 01 01 17.22 +37 01 06.4 c 938
2001-09-26 23:05:15 C 01 01 16.67 +37 01 06.6 c 938
2001-09-26 23:08:32 C 01 01 16.13 +37 01 06.9 c 938
2001-09-27 08:01:09 C 00 59 49.050 +37 01 15.49 g 689
2001-09-28 04:21:37 C 00 56 33.98 +37 00 43.7 15.6 453
2001-09-28 06:09:27 C 00 56 16.16 +37 00 41.2 14.7 c 704
2001-09-28 06:31:07 C 00 56 12.55 +37 00 40.6 15.1 c 704
2001-09-28 06:36:17 C 00 56 12.15 +37 00 38.8 14.9 453
2001-09-28 06:52:56 C 00 56 08.90 +37 00 39.8 15.5 c 704
2001-09-28 07:14:35 C 00 56 05.27 +37 00 39.2 15.5 c 704
2001-09-28 07:36:11 C 00 56 01.59 +37 00 38.8 15.4 c 704
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)