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
2021-11-09 12:03:56 s 1 +166897.26 1 +220683.12 220.0 C57
2021-11-09 12:13:56 S 10 38 53.083 +18 51 24.73 V C57
2021-11-09 12:13:56 s 1 +166750.62 7 +221294.79 1490.0 C57
2021-11-09 12:23:56 S 10 38 53.995 +18 51 18.22 V C57
2021-11-09 12:23:56 s 1 +166602.93 6 +221905.06 9080.0 C57
2021-11-09 12:33:56 S 10 38 55.078 +18 51 08.93 V C57
2021-11-09 12:33:56 s 1 +166454.19 2 +222513.94 3010.0 C57
2021-11-09 14:23:56 S 10 39 06.677 +18 49 54.41 V C57
2021-11-09 14:23:56 s 1 +164749.99 5 +229120.20 9320.0 C57
2021-11-09 14:43:56 S 10 39 08.455 +18 49 44.76 V C57
2021-11-09 14:43:56 s 1 +164427.04 3 +230303.43 8520.0 C57
2021-11-09 15:13:56 S 10 39 11.786 +18 49 25.50 V C57
2021-11-09 15:13:56 s 1 +163935.25 1 +232068.02 1690.0 C57
2021-11-09 15:23:56 S 10 39 12.703 +18 49 13.66 V C57
2021-11-09 15:23:56 s 1 +163769.37 5 +232653.49 5980.0 C57
2021-11-09 17:23:56 S 10 39 25.788 +18 47 58.34 V C57
2021-11-09 17:23:56 s 1 +161704.89 9 +239573.35 330.0 C57
2021-11-09 17:33:56 S 10 39 26.928 +18 47 50.86 V C57
2021-11-09 17:33:56 s 1 +161526.82 9 +240141.25 2240.0 C57
2021-11-09 17:43:56 S 10 39 27.881 +18 47 46.36 V C57
2021-11-09 17:43:56 s 1 +161347.85 3 +240707.80 1000.0 C57
2021-11-09 19:53:56 S 10 39 41.263 +18 46 15.92 V C57
2021-11-09 19:53:56 s 1 +158940.47 4 +247951.78 4720.0 C57
2021-11-09 20:03:56 S 10 39 42.473 +18 46 13.58 V C57
2021-11-09 20:03:56 s 1 +158749.22 7 +248499.74 890.0 C57
2021-11-09 20:13:56 S 10 39 43.505 +18 46 08.18 V C57
2021-11-09 20:13:56 s 1 +158557.13 3 +249046.39 4120.0 C57
2021-11-09 20:23:56 S 10 39 44.842 +18 46 01.27 V C57
2021-11-09 20:23:56 s 1 +158364.19 7 +249591.71 4430.0 C57
2021-11-09 22:13:56 S 10 39 56.059 +18 44 52.48 V C57
2021-11-09 22:13:56 s 1 +156187.37 6 +255504.02 8810.0 C57
2021-11-09 22:33:56 S 10 39 58.051 +18 44 34.76 V C57
2021-11-09 22:33:56 s 1 +155781.07 7 +256562.07 8640.0 C57
2021-11-10 00:53:56 S 10 40 13.159 +18 43 05.59 V C57
2021-11-10 00:53:56 s 1 +152850.00 9 +263824.28 6350.0 C57
2021-11-10 01:13:56 S 10 40 15.384 +18 42 47.77 V C57
2021-11-10 01:13:56 s 1 +152419.19 0 +264841.28 1330.0 C57
2021-11-10 01:43:56 S 10 40 18.010 +18 42 28.76 V C57
2021-11-10 01:43:56 s 1 +151767.45 1 +266357.27 9750.0 C57
2021-11-10 02:03:56 S 10 40 20.170 +18 42 12.10 V C57
2021-11-10 02:03:56 s 1 +151329.32 2 +267361.59 9470.0 C57
2021-11-10 03:53:56 S 10 40 31.898 +18 41 04.78 V C57
2021-11-10 03:53:56 s 1 +148868.83 0 +272795.39 2530.0 C57
2021-11-10 04:03:56 S 10 40 32.983 +18 40 56.60 V C57
2021-11-10 04:03:56 s 1 +148640.97 4 +273281.85 2040.0 C57
2021-11-10 04:13:56 S 10 40 33.730 +18 40 49.08 V C57
2021-11-10 04:13:56 s 1 +148412.43 5 +273767.07 9190.0 C57
2021-11-10 06:23:56 S 10 40 47.045 +18 39 26.42 V C57
2021-11-10 06:23:56 s 1 +145380.65 1 +279962.14 2630.0 C57
2021-11-10 06:53:56 S 10 40 50.664 +18 39 01.22 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)