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
2008-11-08 03:58:58 C 01 01 50.12 +40 44 49.4 r 703
2008-11-08 04:16:41 C 01 01 48.68 +40 44 36.0 r 703
2008-11-14 19:27:13 C 00 51 49.47 +38 43 01.4 c B20
2008-11-14 19:31:48 C 00 51 49.24 +38 42 57.9 c B20
2008-11-14 19:36:23 C 00 51 49.01 +38 42 54.3 c B20
2008-11-15 19:07:54 C 00 50 41.50 +38 24 54.1 c B20
2008-11-15 19:25:39 C 00 50 40.64 +38 24 40.5 c B20
2008-11-15 19:37:31 C 00 50 40.07 +38 24 31.6 c B20
2008-11-15 20:00:22 C 00 50 38.79 +38 24 13.7 c 560
2008-11-15 20:02:39 C 00 50 38.69 +38 24 11.9 c 560
2008-11-15 20:04:56 C 00 50 38.56 +38 24 10.2 c 560
2008-11-15 20:45:40 C 00 50 36.49 +38 23 38.8 r B67
2008-11-15 20:51:59 C 00 50 36.20 +38 23 34.3 r B67
2008-11-15 20:58:19 C 00 50 35.87 +38 23 29.5 r B67
2008-11-17 16:56:56 C 00 48 44.56 +37 50 01.8 16.6 r 084
2008-11-17 17:00:09 C 00 48 44.44 +37 49 59.4 16.5 r 084
2008-11-18 02:52:24 C 00 48 21.85 +37 42 39.2 r 703
2008-11-18 03:01:58 C 00 48 21.42 +37 42 32.0 r 703
2008-11-18 03:11:25 C 00 48 21.06 +37 42 24.9 r 703
2008-11-18 03:20:47 C 00 48 20.66 +37 42 18.0 r 703
2008-11-18 03:30:35 C 00 48 20.26 +37 42 10.6 r 703
2008-11-19 02:25:47 C 00 47 31.01 +37 25 00.3 r H53
2008-11-19 02:28:14 C 00 47 30.92 +37 24 57.8 r H53
2008-11-19 02:30:14 C 00 47 30.87 +37 24 56.5 r H53
2008-11-19 02:33:14 C 00 47 30.72 +37 24 53.7 r H53
2008-11-19 02:36:15 C 00 47 30.57 +37 24 51.9 r H53
2008-11-19 02:39:14 C 00 47 30.53 +37 24 49.9 r H53
2008-11-19 20:02:52 C 00 46 56.11 +37 11 48.9 15.9 r 084
2008-11-19 20:06:06 C 00 46 56.02 +37 11 46.7 15.9 r 084
2008-11-19 20:47:37 C 00 46 54.97 +37 11 20.6 r J53
2008-11-19 20:53:52 C 00 46 54.75 +37 11 16.0 r J53
2008-11-19 20:58:05 C 00 46 54.62 +37 11 13.0 r J53
2008-11-19 21:41:49 C 00 46 52.94 +37 10 38.4 a 233
2008-11-19 21:46:41 C 00 46 52.76 +37 10 34.8 a 233
2008-11-19 21:49:56 C 00 46 52.61 +37 10 32.6 c A24
2008-11-19 21:51:03 C 00 46 52.57 +37 10 31.7 c A24
2008-11-19 21:52:28 C 00 46 52.57 +37 10 30.6 a 233
2008-11-19 22:12:45 C 00 46 51.84 +37 10 15.0 t B75
2008-11-19 22:17:16 C 00 46 51.70 +37 10 11.1 t B75
2008-11-19 22:18:52 C 00 46 51.67 +37 10 10.4 t B75
2008-11-20 01:55:45 C 00 46 45.53 +37 07 32.5 r H53
2008-11-20 01:58:43 C 00 46 45.42 +37 07 30.8 r H53
2008-11-20 02:00:48 C 00 46 45.36 +37 07 29.4 r H53
2008-11-20 02:03:14 C 00 46 45.29 +37 07 27.1 r H53
2008-11-20 02:06:13 C 00 46 45.13 +37 07 24.8 r H53
2008-11-20 02:09:14 C 00 46 45.04 +37 07 22.4 r H53
2008-11-20 21:21:16 C 00 46 11.00 +36 53 14.5 c A24
2008-11-20 21:22:23 C 00 46 10.96 +36 53 13.7 c A24
2008-11-20 21:42:25 C 00 46 10.35 +36 52 58.8 c A24
2008-11-20 22:03:33 C 00 46 09.69 +36 52 43.1 c A24
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)