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
2021-11-13 18:43:56 S 10 49 27.806 +17 41 55.97 V C57
2021-11-13 18:43:56 s 1 -18067.400 0 +377343.82 4540.0 C57
2021-11-13 23:03:56 S 10 49 54.259 +17 38 54.53 V C57
2021-11-13 23:03:56 s 1 -27263.678 0 +375305.42 3740.0 C57
2021-11-13 23:33:56 S 10 49 57.271 +17 38 38.54 V C57
2021-11-13 23:33:56 s 1 -28321.945 0 +375026.48 7950.0 C57
2021-11-13 23:53:56 S 10 49 59.374 +17 38 22.60 V C57
2021-11-13 23:53:56 s 1 -29027.079 0 +374835.48 8670.0 C57
2021-11-14 01:33:56 S 10 50 09.036 +17 37 13.62 V C57
2021-11-14 01:33:56 s 1 -32547.921 0 +373819.91 6060.0 C57
2021-11-14 01:53:56 S 10 50 11.345 +17 36 57.02 V C57
2021-11-14 01:53:56 s 1 -33251.069 0 +373604.67 6080.0 C57
2021-11-14 04:13:56 S 10 50 25.634 +17 35 16.30 V C57
2021-11-14 04:13:56 s 1 -38162.593 0 +371984.50 1550.0 C57
2021-11-14 04:43:56 S 10 50 28.517 +17 35 04.56 V C57
2021-11-14 04:43:56 s 1 -39212.506 0 +371611.44 1780.0 C57
2021-11-14 04:53:56 S 10 50 29.844 +17 34 50.12 V C57
2021-11-14 04:53:56 s 1 -39562.264 0 +371485.05 7450.0 C57
2021-11-14 05:03:56 S 10 50 30.667 +17 34 48.18 V C57
2021-11-14 05:03:56 s 1 -39911.914 0 +371357.64 2570.0 C57
2021-11-14 05:13:56 S 10 50 31.630 +17 34 43.86 V C57
2021-11-14 05:13:56 s 1 -40261.455 0 +371229.21 7150.0 C57
2021-11-14 06:53:56 S 10 50 41.626 +17 33 27.90 V C57
2021-11-14 06:53:56 s 1 -43750.633 0 +369888.90 1920.0 C57
2021-11-14 07:03:56 S 10 50 42.826 +17 33 19.15 V C57
2021-11-14 07:03:56 s 1 -44098.904 0 +369749.25 210.0 C57
2021-11-14 07:13:56 S 10 50 43.560 +17 33 13.10 V C57
2021-11-14 07:13:56 s 1 -44447.054 0 +369608.58 7900.0 C57
2021-11-14 07:23:56 S 10 50 45.067 +17 33 05.26 V C57
2021-11-14 07:23:56 s 1 -44795.081 0 +369466.89 4990.0 C57
2021-11-14 07:43:56 S 10 50 47.047 +17 32 52.84 V C57
2021-11-14 07:43:56 s 1 -45490.763 0 +369180.44 7360.0 C57
2021-11-14 09:43:56 S 10 50 58.718 +17 31 31.84 V C57
2021-11-14 09:43:56 s 1 -49653.979 0 +367375.63 8950.0 C57
2021-11-14 09:53:56 S 10 50 59.885 +17 31 19.31 V C57
2021-11-14 09:53:56 s 1 -50000.037 0 +367218.56 6540.0 C57
2021-11-14 10:03:56 S 10 51 00.809 +17 31 16.46 V C57
2021-11-14 10:03:56 s 1 -50345.956 0 +367060.45 3470.0 C57
2021-11-14 10:13:56 S 10 51 02.021 +17 31 06.89 V C57
2021-11-14 10:13:56 s 1 -50691.733 0 +366901.32 9720.0 C57
2021-11-14 10:33:56 S 10 51 03.996 +17 30 55.01 V C57
2021-11-14 10:33:56 s 1 -51382.860 0 +366579.96 210.0 C57
2021-11-14 10:43:14 C 10 50 41.85 +17 30 22.5 U I41
2021-11-14 11:29:41 C 10 50 46.57 +17 29 50.4 U I41
2021-11-14 11:53:56 S 10 51 11.988 +17 29 56.72 V C57
2021-11-14 11:53:56 s 1 -54141.512 0 +365253.27 4460.0 C57
2021-11-14 12:03:56 S 10 51 12.797 +17 29 54.31 V C57
2021-11-14 12:03:56 s 1 -54485.667 0 +365082.79 3060.0 C57
2021-11-14 12:13:56 S 10 51 13.706 +17 29 41.68 V C57
2021-11-14 12:13:56 s 1 -54829.667 0 +364911.27 930.0 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)