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
2021-12-11 06:53:54 s 1 -72372.630 0 +367179.55 8490.0 C57
2021-12-11 08:43:54 S 11 59 04.673 +08 42 27.97 V C57
2021-12-11 08:43:54 s 1 -76004.272 0 +364849.34 440.0 C57
2021-12-11 08:53:54 S 11 59 05.846 +08 42 17.50 V C57
2021-12-11 08:53:54 s 1 -76333.227 0 +364631.59 1580.0 C57
2021-12-11 09:03:55 S 11 59 06.624 +08 42 11.09 V C57
2021-12-11 09:03:55 s 1 -76661.978 0 +364412.85 1650.0 C57
2021-12-11 09:13:54 S 11 59 07.807 +08 42 00.68 V C57
2021-12-11 09:13:54 s 1 -76990.525 0 +364193.12 650.0 C57
2021-12-11 09:23:54 S 11 59 08.731 +08 41 49.38 V C57
2021-12-11 09:23:54 s 1 -77318.866 0 +363972.40 8560.0 C57
2021-12-11 09:33:54 S 11 59 10.054 +08 41 42.79 V C57
2021-12-11 09:33:54 s 1 -77646.999 0 +363750.70 5390.0 C57
2021-12-11 09:43:54 S 11 59 10.951 +08 41 30.41 V C57
2021-12-11 09:43:54 s 1 -77974.924 0 +363528.01 1120.0 C57
2021-12-11 09:53:54 S 11 59 12.185 +08 41 21.91 V C57
2021-12-11 09:53:54 s 1 -78302.640 0 +363304.32 5760.0 C57
2021-12-11 11:03:54 S 11 59 19.764 +08 40 16.07 V C57
2021-12-11 11:03:54 s 1 -80590.689 0 +361710.77 7140.0 C57
2021-12-11 11:23:54 S 11 59 21.845 +08 39 51.95 V C57
2021-12-11 11:23:54 s 1 -81242.466 0 +361246.53 7390.0 C57
2021-12-11 11:33:54 S 11 59 23.014 +08 39 41.44 V C57
2021-12-11 11:33:54 s 1 -81568.025 0 +361012.92 800.0 C57
2021-12-11 11:43:54 S 11 59 23.890 +08 39 33.41 V C57
2021-12-11 11:43:54 s 1 -81893.361 0 +360778.32 3050.0 C57
2021-12-11 11:53:54 S 11 59 25.032 +08 39 27.47 V C57
2021-12-11 11:53:54 s 1 -82218.473 0 +360542.71 4150.0 C57
2021-12-11 12:03:55 S 11 59 26.069 +08 39 16.99 V C57
2021-12-11 12:03:55 s 1 -82543.362 0 +360306.12 4100.0 C57
2021-12-11 12:13:54 S 11 59 27.298 +08 39 14.87 V C57
2021-12-11 12:13:54 s 1 -82868.024 0 +360068.52 2870.0 C57
2021-12-11 12:33:54 S 11 59 29.513 +08 38 46.68 V C57
2021-12-11 12:33:54 s 1 -83516.668 0 +359590.34 6900.0 C57
2021-12-11 14:13:54 S 11 59 40.274 +08 37 07.68 V C57
2021-12-11 14:13:54 s 1 -86745.946 0 +357139.44 5380.0 C57
2021-12-11 14:23:54 S 11 59 41.107 +08 37 00.26 V C57
2021-12-11 14:23:54 s 1 -87067.568 0 +356888.83 8540.0 C57
2021-12-11 14:33:54 S 11 59 42.216 +08 36 49.93 V C57
2021-12-11 14:33:54 s 1 -87388.946 0 +356637.23 450.0 C57
2021-12-11 14:43:54 S 11 59 43.306 +08 36 38.52 V C57
2021-12-11 14:43:54 s 1 -87710.082 0 +356384.62 1130.0 C57
2021-12-11 14:53:54 S 11 59 44.359 +08 36 34.92 V C57
2021-12-11 14:53:54 s 1 -88030.972 0 +356131.00 550.0 C57
2021-12-11 15:03:54 S 11 59 45.605 +08 36 20.95 V C57
2021-12-11 15:03:54 s 1 -88351.617 0 +355876.38 8720.0 C57
2021-12-11 15:13:54 S 11 59 46.901 +08 36 10.30 V C57
2021-12-11 15:13:54 s 1 -88672.014 0 +355620.75 5630.0 C57
2021-12-11 16:23:54 S 11 59 53.995 +08 35 01.03 V C57
2021-12-11 16:23:54 s 1 -90907.766 0 +353803.13 8300.0 C57
2021-12-11 16:33:54 S 11 59 54.962 +08 34 50.02 V 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)