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
2021-11-14 12:23:56 S 10 51 14.868 +17 29 35.45 V C57
2021-11-14 12:23:56 s 1 -55173.512 0 +364738.71 8080.0 C57
2021-11-14 12:28:47 C 10 50 52.55 +17 29 09.4 U I41
2021-11-14 12:32:16 C 10 50 52.90 +17 29 07.0 U I41
2021-11-14 12:33:56 S 10 51 16.152 +17 29 24.79 V C57
2021-11-14 12:33:56 s 1 -55517.200 0 +364565.12 4500.0 C57
2021-11-14 12:43:56 S 10 51 17.100 +17 29 26.63 V C57
2021-11-14 12:43:56 s 1 -55860.731 0 +364390.50 180.0 C57
2021-11-14 12:53:56 S 10 51 17.628 +17 29 09.35 V C57
2021-11-14 12:53:56 s 1 -56204.103 0 +364214.84 5130.0 C57
2021-11-14 14:33:56 S 10 51 27.900 +17 28 03.18 V C57
2021-11-14 14:33:56 s 1 -59628.850 0 +362401.12 2930.0 C57
2021-11-14 14:53:56 S 10 51 29.964 +17 27 49.75 V C57
2021-11-14 14:53:56 s 1 -60311.781 0 +362025.90 5180.0 C57
2021-11-14 15:03:56 S 10 51 30.979 +17 27 43.78 V C57
2021-11-14 15:03:56 s 1 -60652.988 0 +361836.72 110.0 C57
2021-11-14 15:13:56 S 10 51 32.314 +17 27 39.71 V C57
2021-11-14 15:13:56 s 1 -60994.019 0 +361646.51 4240.0 C57
2021-11-14 15:23:56 S 10 51 33.127 +17 27 29.05 V C57
2021-11-14 15:23:56 s 1 -61334.875 0 +361455.24 7570.0 C57
2021-11-14 17:23:56 S 10 51 44.974 +17 26 04.74 V C57
2021-11-14 17:23:56 s 1 -65411.006 0 +359078.52 2940.0 C57
2021-11-14 17:43:56 S 10 51 47.174 +17 25 52.43 V C57
2021-11-14 17:43:56 s 1 -66087.741 0 +358667.73 6940.0 C57
2021-11-14 18:03:56 S 10 51 49.270 +17 25 34.90 V C57
2021-11-14 18:03:56 s 1 -66763.702 0 +358252.73 7440.0 C57
2021-11-14 20:03:56 S 10 52 01.008 +17 24 18.47 V C57
2021-11-14 20:03:56 s 1 -70802.669 0 +355674.17 4850.0 C57
2021-11-14 20:33:56 S 10 52 04.512 +17 23 51.65 V C57
2021-11-14 20:33:56 s 1 -71807.754 0 +355005.74 5860.0 C57
2021-11-14 20:43:56 S 10 52 04.958 +17 23 45.06 V C57
2021-11-14 20:43:56 s 1 -72142.355 0 +354780.81 950.0 C57
2021-11-14 20:53:56 S 10 52 06.101 +17 23 42.18 V C57
2021-11-14 20:53:56 s 1 -72476.741 0 +354554.82 5090.0 C57
2021-11-14 22:33:56 S 10 52 16.090 +17 22 27.12 V C57
2021-11-14 22:33:56 s 1 -75808.458 0 +352236.39 2520.0 C57
2021-11-14 23:03:56 S 10 52 19.051 +17 22 06.10 V C57
2021-11-14 23:03:56 s 1 -76803.553 0 +351520.06 9190.0 C57
2021-11-14 23:13:56 S 10 52 20.364 +17 21 57.67 V C57
2021-11-14 23:13:56 s 1 -77134.786 0 +351279.15 9360.0 C57
2021-11-14 23:23:56 S 10 52 21.048 +17 21 53.32 V C57
2021-11-14 23:23:56 s 1 -77465.783 0 +351037.16 8490.0 C57
2021-11-14 23:43:56 S 10 52 23.126 +17 21 34.27 V C57
2021-11-14 23:43:56 s 1 -78127.069 0 +350549.98 3630.0 C57
2021-11-15 01:03:56 S 10 52 31.334 +17 20 40.24 V C57
2021-11-15 01:03:56 s 1 -80762.552 0 +348558.29 1740.0 C57
2021-11-15 01:13:56 S 10 52 32.059 +17 20 32.75 V C57
2021-11-15 01:13:56 s 1 -81090.878 0 +348304.49 9150.0 C57
2021-11-15 01:23:56 S 10 52 33.470 +17 20 29.80 V C57
2021-11-15 01:23:56 s 1 -81418.954 0 +348049.60 5460.0 C57
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)