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
1994-09-05 18:52:59 21 28 49.36 -01 48 36.6 m 095
1994-09-05 23:40:45 T 21 28 51.455 -01 27 33.48 950
1994-09-06 05:49:44 21 28 56.95 -01 02 00.0 675
1994-09-06 06:26:00 21 28 56.58 -00 59 33.8 675
1994-09-06 18:36:30 21 29 08.25 -00 12 08.6 m 095
1994-09-06 18:56:30 21 29 08.17 -00 10 53.3 m 095
1994-09-06 19:52:59 C 21 29 09.29 -00 07 24.3 z 540
1994-09-06 19:55:10 C 21 29 09.27 -00 07 16.5 z 540
1994-09-06 19:56:22 C 21 29 09.27 -00 07 11.8 z 540
1994-09-06 20:28:59 21 29 09.63 -00 05 09.0 m 026
1994-09-06 20:45:35 C 21 29 09.43 -00 04 02.6 z 111
1994-09-06 20:48:09 C 21 29 09.40 -00 03 54.3 z 111
1994-09-06 23:37:09 T 21 29 10.680 +00 06 48.90 950
1994-09-07 23:33:33 T 21 29 30.825 +01 28 19.38 950
1994-09-08 23:18:19 C 21 29 51.28 +02 38 10.4 482
1994-09-08 23:26:39 C 21 29 51.35 +02 38 32.8 482
1994-09-08 23:29:58 T 21 29 52.077 +02 39 12.47 950
1994-09-09 02:20:45 C 21 29 55.41 +02 46 45.2 z 801
1994-09-09 02:24:19 C 21 29 55.40 +02 46 54.9 z 801
1994-09-09 20:08:09 C 21 30 12.31 +03 32 48.9 046
1994-09-09 20:10:56 C 21 30 12.31 +03 32 55.7 046
1994-09-09 20:12:10 C 21 30 12.31 +03 32 58.8 046
1994-09-09 21:17:59 21 30 12.85 +03 35 42.1 m 026
1994-09-09 23:26:25 T 21 30 14.462 +03 41 15.25 950
1994-09-10 23:22:44 C 21 30 37.32 +04 35 29.2 z 967
1994-09-10 23:22:53 T 21 30 38.131 +04 35 52.86 950
1994-09-11 23:19:22 T 21 31 03.057 +05 24 11.62 950
1994-09-11 23:30:33 C 21 31 01.92 +05 24 09.2 606
1994-09-12 23:15:52 T 21 31 29.260 +06 07 08.08 950
1994-09-13 18:47:59 21 31 52.30 +06 38 26.9 m 095
1994-09-13 19:07:59 21 31 52.43 +06 38 58.8 m 095
1994-09-13 23:07:49 21 31 55.75 +06 44 59.5 072
1994-09-13 23:12:24 T 21 31 56.820 +06 45 26.57 950
1994-09-13 23:18:04 21 31 55.84 +06 45 15.3 072
1994-09-14 23:08:57 T 21 32 25.667 +07 19 44.06 950
1994-09-15 07:53:30 C 21 32 36.99 +07 31 29.7 c 608
1994-09-15 08:46:29 C 21 32 37.28 +07 32 40.5 c 608
1994-09-15 23:05:31 T 21 32 55.814 +07 50 32.09 950
1994-09-17 19:00:33 C 21 33 55.61 +08 39 04.8 z 540
1994-09-17 19:02:04 C 21 33 55.63 +08 39 06.2 z 540
1994-09-17 19:05:14 C 21 33 55.69 +08 39 09.6 z 540
1994-09-19 12:23:49 A 21 34 53.91 +09 17 41.3 z 388
1994-09-20 12:20:29 A 21 35 30.01 +09 37 08.8 z 388
1994-09-20 19:18:53 C 21 35 41.48 +09 42 20.2 z 540
1994-09-20 19:20:25 C 21 35 41.51 +09 42 21.1 z 540
1994-09-20 19:26:26 C 21 35 41.60 +09 42 25.3 z 540
1994-09-20 22:57:29 C 21 35 45.56 +09 44 59.9 606
1994-09-22 07:36:29 C 21 36 38.88 +10 08 05.5 c 608
1994-09-22 08:26:30 C 21 36 39.68 +10 08 38.4 c 608
1994-09-22 19:13:15 C 21 36 58.73 +10 15 09.4 z 970
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)