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
2008-02-18 12:51:47 C 10 34 55.19 +19 19 28.2 c E14
2008-02-18 13:21:02 C 10 34 50.30 +19 18 59.4 c E14
2008-02-18 21:45:54 C 10 33 34.63 +19 10 03.1 c 127
2008-02-18 21:50:56 C 10 33 33.82 +19 09 58.2 c 127
2008-02-18 21:56:07 C 10 33 33.01 +19 09 53.3 c 127
2008-02-18 22:01:38 C 10 33 32.13 +19 09 47.9 c 127
2008-02-22 21:21:40 C 10 17 17.61 +17 20 36.9 12.2 r B61
2008-02-22 22:25:16 C 10 17 05.02 +17 19 13.6 12.8 r B61
2008-02-23 21:39:34 C 10 12 34.73 +16 46 54.0 12.4 r B61
2008-02-23 22:28:45 C 10 12 24.50 +16 45 43.8 13.0 r B61
2008-02-24 22:14:36 C 10 07 32.93 +16 09 56.8 13.0 r A97
2008-02-24 22:17:58 C 10 07 32.19 +16 09 51.7 13.0 r A97
2008-02-24 22:21:21 C 10 07 31.46 +16 09 46.3 12.8 r A97
2008-02-24 22:24:43 C 10 07 30.72 +16 09 41.1 12.8 r A97
2008-02-24 22:28:43 C 10 07 29.85 +16 09 35.1 12.7 r A97
2008-02-24 22:32:07 C 10 07 29.10 +16 09 29.5 12.6 r A97
2008-02-24 22:57:07 C 10 07 23.93 +16 08 49.9 o B50
2008-02-24 23:10:00 C 10 07 21.10 +16 08 30.4 o B50
2008-02-24 23:12:45 C 10 07 20.50 +16 08 26.0 o B50
2008-02-24 23:13:39 C 10 07 20.28 +16 08 24.6 o B50
2008-02-24 23:15:30 C 10 07 19.91 +16 08 21.6 o B50
2008-02-24 23:17:20 C 10 07 19.47 +16 08 18.8 o B50
2008-02-24 23:22:06 C 10 07 18.47 +16 08 11.6 o B50
2008-02-24 23:49:50 C 10 07 12.37 +16 07 28.2 o B50
2008-02-25 21:38:23 C 10 02 32.54 +15 32 09.1 o A92
2008-02-25 21:54:23 C 10 02 28.87 +15 31 43.1 o A92
2008-02-25 22:02:03 C 10 02 27.18 +15 31 30.5 o A92
2008-02-27 06:39:32 C 09 55 05.34 +14 34 04.6 r 703
2008-02-27 06:49:57 C 09 55 02.74 +14 33 45.3 r 703
2008-02-27 07:00:20 C 09 55 00.19 +14 33 26.0 r 703
2008-02-27 07:10:43 C 09 54 57.63 +14 33 06.6 r 703
2008-02-27 07:31:48 C 09 54 51.62 +14 32 24.2 r H45
2008-02-27 07:32:47 C 09 54 51.38 +14 32 22.4 r H45
2008-02-27 07:36:40 C 09 54 50.43 +14 32 15.2 r H45
2008-02-27 07:40:17 C 09 54 49.55 +14 32 08.3 r H45
2008-02-27 07:52:01 C 09 54 46.68 +14 31 46.2 r H45
2008-02-27 08:01:45 C 09 54 44.98 +14 31 30.2 c 704
2008-02-27 08:18:42 C 09 54 40.92 +14 30 59.2 c 704
2008-02-27 08:35:34 C 09 54 36.69 +14 30 26.3 c 704
2008-02-27 08:52:27 C 09 54 32.58 +14 29 54.2 c 704
2008-02-27 09:09:19 C 09 54 28.45 +14 29 22.6 c 704
2008-02-27 22:21:25 C 09 51 22.76 +14 04 05.8 13.6 r A97
2008-02-27 22:24:48 C 09 51 21.90 +14 03 59.1 13.4 r A97
2008-02-27 22:28:11 C 09 51 21.06 +14 03 52.4 r A97
2008-02-27 22:31:34 C 09 51 20.23 +14 03 45.9 13.2 r A97
2008-02-27 22:34:56 C 09 51 19.37 +14 03 39.4 14.0 r A97
2008-02-27 22:38:19 C 09 51 18.54 +14 03 32.9 13.2 r A97
2008-02-28 06:29:03 C 09 49 25.27 +13 48 20.6 c 704
2008-02-28 06:45:31 C 09 49 21.06 +13 47 48.4 c 704
2008-02-28 07:02:01 C 09 49 16.83 +13 47 15.6 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)