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
1969-09-18 02:51:31 A 20 55 19.26 +02 00 06.2 805
1969-09-18 02:56:30 A 20 55 19.73 +02 00 15.0 805
1969-09-18 03:00:19 A 20 55 21 +01 59.5 774
1969-09-18 20:24:32 A 20 57 07.60 +02 26 47.0 020
1969-09-18 20:33:31 A 20 57 08.41 +02 27 00.4 020
1969-09-19 02:56:41 A 20 57 47 +02 36.7 774
1969-09-19 03:18:40 A 20 57 49 +02 37.3 774
1969-09-20 20:29:59 A 21 01 42.84 +03 34 34.9 119
1969-09-20 20:33:07 A 21 01 49.81 +03 28 46.6 020
1969-09-20 20:37:59 A 21 01 43.56 +03 34 44.8 119
1969-09-20 20:41:06 A 21 01 50.11 +03 28 52.8 020
1969-09-20 20:53:59 A 21 01 44.89 +03 35 05.3 119
1969-09-20 21:05:30 A 21 01 45.87 +03 35 19.6 119
1969-09-20 21:18:30 A 21 01 46.94 +03 35 36.8 119
1969-09-20 21:45:30 A 21 01 49.29 +03 36 11.3 119
1969-09-21 17:59:29 A 21 03 39.90 +04 01 26.3 119
1969-09-21 18:08:04 A 21 03 41.30 +04 01 37.9 119
1969-09-21 18:28:29 A 21 03 42.76 +04 02 00.9 119
1969-09-21 18:39:29 A 21 03 43.68 +04 02 13.8 119
1969-09-21 18:47:30 A 21 03 44.36 +04 02 23.4 119
1969-09-21 18:55:29 A 21 03 44.96 +04 02 33.3 119
1969-09-21 19:03:30 A 21 03 45.64 +04 02 42.9 119
1969-09-21 19:14:30 A 21 03 46.51 +04 02 55.9 119
1969-09-26 19:41:23 A 21 13 31.49 +06 11 01.6 020
1969-09-26 19:54:21 A 21 13 32.04 +06 11 10.7 020
1969-09-27 16:47:28 A 21 15 14.11 +06 19 53.1 119
1969-09-27 17:18:29 A 21 15 16.16 +06 20 16.1 119
1969-09-27 17:31:30 A 21 15 17.03 +06 20 25.7 119
1969-09-27 17:43:29 A 21 15 17.82 +06 20 35.3 119
1969-09-27 17:56:30 A 21 15 18.72 +06 20 45.2 119
1969-09-27 18:07:30 A 21 15 19.47 +06 20 53.5 119
1969-09-27 18:18:30 A 21 15 20.16 +06 21 02.4 119
1969-09-27 18:30:29 A 21 15 20.99 +06 21 11.9 119
1969-09-27 18:41:30 A 21 15 21.76 +06 21 20.0 119
1969-09-28 14:56:11 A 21 16 59.94 +06 37 41.5 119
1969-09-28 16:22:29 A 21 16 58.94 +06 37 30.6 119
1969-09-28 16:50:59 A 21 17 00.92 +06 37 51.6 119
1969-09-28 17:10:59 A 21 17 02.23 +06 38 05.9 119
1969-09-28 17:28:59 A 21 17 03.44 +06 38 19.0 119
1969-09-28 17:48:59 A 21 17 14.75 +06 38 33.5 119
1969-09-28 18:11:00 A 21 17 06.22 +06 38 49.0 119
1969-09-28 18:29:59 A 21 17 07.45 +06 39 02.2 119
1969-09-28 18:40:58 A 21 17 08.19 +06 39 10.4 119
1969-09-28 18:54:00 A 21 17 09.05 +06 39 20.0 119
1969-09-29 16:11:00 A 21 18 43.23 +06 54 13.1 119
1969-09-29 16:29:29 A 21 18 44.15 +06 54 22.2 119
1969-09-29 16:54:00 A 21 18 45.78 +06 54 39.1 119
1969-09-29 17:21:00 A 21 18 47.45 +06 54 56.9 119
1969-09-29 17:37:00 A 21 18 48.52 +06 55 07.8 119
1969-09-29 17:50:59 A 21 18 49.45 +06 55 17.6 119
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)