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
2015-12-20 02:15:01 C 01 37 52.18 +37 53 35.9 u H21
2015-12-20 02:17:06 C 01 37 52.19 +37 53 34.6 u H21
2015-12-20 02:19:10 C 01 37 52.20 +37 53 33.3 u H21
2015-12-20 02:21:14 C 01 37 52.21 +37 53 31.9 u H21
2015-12-20 02:23:18 C 01 37 52.21 +37 53 30.7 u H21
2015-12-20 02:25:19 C 01 37 52.22 +37 53 29.4 u H21
2015-12-20 02:27:39 C 01 37 52.25 +37 53 28.1 u H21
2015-12-20 02:29:43 C 01 37 52.24 +37 53 26.6 u H21
2015-12-20 02:31:35 C 01 37 52.25 +37 53 25.4 u H21
2015-12-20 02:33:52 C 01 37 52.27 +37 53 24.0 u H21
2015-12-20 18:38:29 C 01 38 00.38 +37 43 31.6 c A24
2015-12-20 18:39:31 C 01 38 00.38 +37 43 31.0 c A24
2015-12-25 19:20:01 C 01 39 48.26 +36 34 25.6 q 160
2015-12-25 19:22:26 C 01 39 48.32 +36 34 24.2 q 160
2015-12-25 19:24:42 C 01 39 48.32 +36 34 23.3 q 160
2015-12-26 01:20:35 C 01 39 55.83 +36 31 13.4 u H21
2015-12-26 01:22:36 C 01 39 55.87 +36 31 12.8 u H21
2015-12-26 01:24:37 C 01 39 55.92 +36 31 11.7 u H21
2015-12-26 01:26:37 C 01 39 55.95 +36 31 10.6 u H21
2015-12-26 01:28:37 C 01 39 55.98 +36 31 09.5 u H21
2015-12-26 01:30:38 C 01 39 56.02 +36 31 08.4 u H21
2015-12-26 01:32:38 C 01 39 56.06 +36 31 07.5 u H21
2015-12-26 01:34:39 C 01 39 56.10 +36 31 06.3 u H21
2015-12-26 01:36:39 C 01 39 56.14 +36 31 05.4 u H21
2015-12-26 01:38:39 C 01 39 56.17 +36 31 04.3 u H21
2015-12-26 01:40:39 C 01 39 56.20 +36 31 03.2 u H21
2015-12-26 01:42:39 C 01 39 56.25 +36 31 02.2 u H21
2015-12-26 01:44:42 C 01 39 56.28 +36 31 01.0 u H21
2015-12-26 01:46:39 C 01 39 56.33 +36 31 00.1 u H21
2015-12-26 01:48:44 C 01 39 56.36 +36 30 58.8 u H21
2015-12-27 17:54:35 C 01 40 51.60 +36 10 05.1 q C77
2015-12-27 18:08:24 C 01 40 51.92 +36 09 58.2 q C77
2015-12-27 18:22:14 C 01 40 52.22 +36 09 51.2 q C77
2015-12-27 18:36:01 C 01 40 52.53 +36 09 44.2 q C77
2015-12-30 10:06:25 C 01 42 36.28 +35 38 40.6 o 300
2015-12-30 10:09:44 C 01 42 36.33 +35 38 38.7 o 300
2015-12-30 10:13:03 C 01 42 36.40 +35 38 37.1 o 300
2015-12-30 10:16:21 C 01 42 36.55 +35 38 35.8 o 300
2015-12-30 10:19:40 C 01 42 36.67 +35 38 34.0 o 300
2015-12-30 10:22:58 C 01 42 36.74 +35 38 33.2 o 300
2015-12-30 10:26:17 C 01 42 36.80 +35 38 30.6 o 300
2015-12-31 02:38:18 C 01 43 06.31 +35 30 59.1 q 703
2015-12-31 02:45:55 C 01 43 06.61 +35 30 55.3 q 703
2015-12-31 02:53:32 C 01 43 06.95 +35 30 50.8 q 703
2016-01-03 05:02:33 C 01 45 36.99 +34 58 13.3 q 703
2016-01-03 05:08:23 C 01 45 37.22 +34 58 11.0 q 703
2016-01-03 05:14:13 C 01 45 37.43 +34 58 08.3 q 703
2016-01-03 05:20:03 C 01 45 37.67 +34 58 04.9 q 703
2016-01-08 06:45:57 C 01 50 33.90 +34 11 22.0 L T05
2016-01-08 07:08:17 C 01 50 34.87 +34 11 14.8 L T05
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)