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
2021-12-24 14:53:54 S 12 35 27.271 +03 09 12.46 V C57
2021-12-24 14:53:54 s 1 -56578.357 0 +375578.80 6840.0 C57
2021-12-24 15:03:54 S 12 35 28.798 +03 09 04.61 V C57
2021-12-24 15:03:54 s 1 -56924.215 0 +375423.06 2400.0 C57
2021-12-24 15:13:54 S 12 35 29.930 +03 08 52.30 V C57
2021-12-24 15:13:54 s 1 -57269.926 0 +375266.35 7080.0 C57
2021-12-24 15:43:54 S 12 35 33.394 +03 08 17.56 V C57
2021-12-24 15:43:54 s 1 -58306.162 0 +374790.36 5770.0 C57
2021-12-24 15:53:54 S 12 35 34.656 +03 08 07.26 V C57
2021-12-24 15:53:54 s 1 -58651.272 0 +374629.75 6880.0 C57
2021-12-24 16:03:54 S 12 35 35.762 +03 07 54.12 V C57
2021-12-24 16:03:54 s 1 -58996.228 0 +374468.17 7080.0 C57
2021-12-24 16:13:54 S 12 35 36.982 +03 07 42.89 V C57
2021-12-24 16:13:54 s 1 -59341.031 0 +374305.61 6380.0 C57
2021-12-24 16:23:54 S 12 35 38.189 +03 07 30.76 V C57
2021-12-24 16:23:54 s 1 -59685.679 0 +374142.07 4760.0 C57
2021-12-24 16:33:54 S 12 35 39.343 +03 07 17.18 V C57
2021-12-24 16:33:54 s 1 -60030.171 0 +373977.56 2220.0 C57
2021-12-24 17:23:54 S 12 35 45.113 +03 06 16.56 V C57
2021-12-24 17:23:54 s 1 -61750.255 0 +373140.36 5630.0 C57
2021-12-24 17:53:54 S 12 35 48.794 +03 05 45.89 V C57
2021-12-24 17:53:54 s 1 -62780.367 0 +372626.32 8380.0 C57
2021-12-24 18:03:54 S 12 35 50.189 +03 05 31.81 V C57
2021-12-24 18:03:54 s 1 -63123.408 0 +372453.02 7380.0 C57
2021-12-24 18:13:54 S 12 35 51.223 +03 05 21.05 V C57
2021-12-24 18:13:54 s 1 -63466.283 0 +372278.73 5430.0 C57
2021-12-24 18:23:54 S 12 35 52.462 +03 05 11.04 V C57
2021-12-24 18:23:54 s 1 -63808.991 0 +372103.47 2500.0 C57
2021-12-24 18:33:54 S 12 35 53.503 +03 04 58.69 V C57
2021-12-24 18:33:54 s 1 -64151.530 0 +371927.23 8610.0 C57
2021-12-24 18:43:54 S 12 35 54.799 +03 04 50.38 V C57
2021-12-24 18:43:54 s 1 -64493.900 0 +371750.01 3730.0 C57
2021-12-24 18:53:54 S 12 35 56.004 +03 04 34.14 V C57
2021-12-24 18:53:54 s 1 -64836.099 0 +371571.81 7880.0 C57
2021-12-24 19:03:54 S 12 35 56.791 +03 04 23.59 V C57
2021-12-24 19:03:54 s 1 -65178.127 0 +371392.63 1040.0 C57
2021-12-24 20:33:54 S 12 36 07.944 +03 02 36.82 V C57
2021-12-24 20:33:54 s 1 -68248.475 0 +369735.86 4350.0 C57
2021-12-24 20:43:54 S 12 36 08.998 +03 02 27.53 V C57
2021-12-24 20:43:54 s 1 -68588.728 0 +369546.86 7400.0 C57
2021-12-24 20:53:54 S 12 36 10.421 +03 02 14.60 V C57
2021-12-24 20:53:54 s 1 -68928.797 0 +369356.88 9410.0 C57
2021-12-24 21:03:54 S 12 36 11.467 +03 02 03.95 V C57
2021-12-24 21:03:54 s 1 -69268.682 0 +369165.91 380.0 C57
2021-12-24 21:13:54 S 12 36 12.535 +03 01 51.92 V C57
2021-12-24 21:13:54 s 1 -69608.381 0 +368973.96 300.0 C57
2021-12-24 21:23:54 S 12 36 13.752 +03 01 38.75 V C57
2021-12-24 21:23:54 s 1 -69947.893 0 +368781.03 9160.0 C57
2021-12-24 21:33:54 S 12 36 14.959 +03 01 27.70 V C57
2021-12-24 21:33:54 s 1 -70287.218 0 +368587.11 6980.0 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)