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
2005-11-21 01:46:00 C 21 02 49.27 -08 45 38.7 r 703
2005-11-21 01:53:37 C 21 02 50.35 -08 45 31.3 r 703
2005-11-21 17:44:40 C 21 05 06.00 -08 30 33.2 o A32
2005-11-22 01:18:40 C 21 06 10.33 -08 23 23.0 r 703
2005-11-22 01:25:38 C 21 06 11.41 -08 23 16.8 r 703
2005-11-22 01:32:36 C 21 06 12.42 -08 23 11.6 r 703
2005-11-22 01:39:32 C 21 06 13.35 -08 23 03.6 r 703
2005-11-25 01:31:37 C 21 16 14.16 -07 15 56.8 r 703
2005-11-25 01:40:47 C 21 16 15.45 -07 15 48.4 r 703
2005-11-25 01:49:58 C 21 16 16.57 -07 15 40.9 r 703
2005-11-25 01:59:07 C 21 16 17.90 -07 15 32.2 r 703
2005-12-01 02:28:45 C 21 35 33.03 -05 04 36.5 r 703
2005-12-01 02:35:00 C 21 35 33.86 -05 04 31.0 r 703
2005-12-01 02:47:31 C 21 35 35.44 -05 04 19.9 r 703
2005-12-01 18:44:02 C 21 37 38.71 -04 50 16.5 r 113
2005-12-01 18:45:23 C 21 37 38.86 -04 50 14.9 r 113
2005-12-01 18:46:43 C 21 37 39.03 -04 50 14.1 r 113
2005-12-01 18:48:04 C 21 37 39.20 -04 50 12.8 r 113
2005-12-02 01:45:14 C 21 38 33.31 -04 43 59.4 c 704
2005-12-02 02:04:04 C 21 38 35.66 -04 43 43.2 c 704
2005-12-02 02:22:37 C 21 38 38.04 -04 43 26.4 c 704
2005-12-02 02:41:40 C 21 38 40.45 -04 43 10.3 c 704
2005-12-02 03:00:19 C 21 38 42.82 -04 42 53.8 c 704
2005-12-25 02:04:58 C 22 43 51.88 +02 48 17.7 r 703
2005-12-25 02:14:15 C 22 43 52.86 +02 48 25.5 r 703
2005-12-25 02:23:32 C 22 43 53.90 +02 48 32.0 r 703
2005-12-25 02:32:46 C 22 43 54.91 +02 48 39.3 r 703
2006-01-07 02:05:44 C 23 17 22.34 +06 37 24.1 r 703
2006-01-07 02:17:14 C 23 17 23.56 +06 37 30.8 r 703
2006-01-07 02:28:45 C 23 17 24.75 +06 37 40.6 r 703
2006-01-07 02:40:16 C 23 17 26.01 +06 37 48.3 r 703
2006-01-07 03:40:07 C 23 17 32.18 +06 38 30.4 r 703
2006-01-07 03:52:05 C 23 17 33.45 +06 38 39.0 r 703
2006-01-07 04:04:03 C 23 17 34.72 +06 38 47.8 r 703
2006-01-07 04:16:02 C 23 17 35.96 +06 38 55.8 r 703
2007-10-07 10:17:05 C 08 26 50.67 +32 22 54.3 r 703
2007-10-07 10:27:40 C 08 26 51.61 +32 22 52.5 r 703
2007-10-07 10:38:04 C 08 26 52.69 +32 22 51.8 r 703
2007-10-07 10:48:29 C 08 26 53.70 +32 22 50.4 r 703
2007-11-07 10:27:22 C 09 34 57.32 +29 41 44.5 r 703
2007-11-07 10:39:07 C 09 34 58.33 +29 41 42.1 r 703
2007-11-07 10:50:50 C 09 34 59.34 +29 41 39.8 r 703
2007-11-07 11:02:45 C 09 35 00.31 +29 41 37.7 r 703
2007-11-09 10:32:18 C 09 39 01.62 +29 30 14.2 c 704
2007-11-09 10:49:54 C 09 39 03.10 +29 30 10.5 c 704
2007-11-09 11:07:28 C 09 39 04.53 +29 30 06.3 c 704
2007-11-09 11:25:03 C 09 39 05.99 +29 30 02.4 c 704
2007-11-09 11:42:39 C 09 39 07.44 +29 29 58.2 c 704
2007-11-18 10:01:18 C 09 56 41.24 +28 38 26.2 r 703
2007-11-18 10:12:25 C 09 56 42.10 +28 38 23.2 r 703
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)