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
2021-12-10 09:43:55 s 1 -29121.284 0 +385600.58 1720.0 C57
2021-12-10 09:53:54 S 11 56 36.166 +09 04 25.82 V C57
2021-12-10 09:53:54 s 1 -29468.547 0 +385515.63 8640.0 C57
2021-12-10 10:03:55 S 11 56 37.231 +09 04 19.99 V C57
2021-12-10 10:03:55 s 1 -29815.742 0 +385429.73 5060.0 C57
2021-12-10 10:13:54 S 11 56 38.246 +09 04 07.72 V C57
2021-12-10 10:13:54 s 1 -30162.868 0 +385342.89 990.0 C57
2021-12-10 10:23:55 S 11 56 39.432 +09 03 57.60 V C57
2021-12-10 10:23:55 s 1 -30509.925 0 +385255.11 6420.0 C57
2021-12-10 10:43:54 S 11 56 41.340 +09 03 38.81 V C57
2021-12-10 10:43:54 s 1 -31203.826 0 +385076.70 5780.0 C57
2021-12-10 11:53:55 S 11 56 49.154 +09 02 33.76 V C57
2021-12-10 11:53:55 s 1 -33630.156 0 +384422.52 2330.0 C57
2021-12-10 12:03:55 S 11 56 50.203 +09 02 21.88 V C57
2021-12-10 12:03:55 s 1 -33976.468 0 +384325.28 2590.0 C57
2021-12-10 12:13:54 S 11 56 51.295 +09 02 14.71 V C57
2021-12-10 12:13:54 s 1 -34322.700 0 +384227.10 2310.0 C57
2021-12-10 12:23:55 S 11 56 52.529 +09 02 02.98 V C57
2021-12-10 12:23:55 s 1 -34668.852 0 +384127.97 1480.0 C57
2021-12-10 12:33:54 S 11 56 53.431 +09 01 56.17 V C57
2021-12-10 12:33:54 s 1 -35014.923 0 +384027.89 110.0 C57
2021-12-10 12:43:55 S 11 56 54.624 +09 01 45.98 V C57
2021-12-10 12:43:55 s 1 -35360.912 0 +383926.86 8190.0 C57
2021-12-10 12:53:54 S 11 56 55.565 +09 01 31.55 V C57
2021-12-10 12:53:54 s 1 -35706.817 0 +383824.89 5710.0 C57
2021-12-10 13:03:55 S 11 56 56.628 +09 01 20.17 V C57
2021-12-10 13:03:55 s 1 -36052.639 0 +383721.97 2680.0 C57
2021-12-10 13:13:54 S 11 56 57.938 +09 01 17.47 V C57
2021-12-10 13:13:54 s 1 -36398.376 0 +383618.11 9080.0 C57
2021-12-10 14:23:54 S 11 57 05.638 +09 00 09.79 V C57
2021-12-10 14:23:54 s 1 -38816.080 0 +382864.49 7850.0 C57
2021-12-10 14:33:55 S 11 57 06.636 +08 59 58.81 V C57
2021-12-10 14:33:55 s 1 -39161.105 0 +382753.03 9620.0 C57
2021-12-10 14:43:54 S 11 57 07.601 +08 59 48.48 V C57
2021-12-10 14:43:54 s 1 -39506.037 0 +382640.62 790.0 C57
2021-12-10 14:53:54 S 11 57 08.825 +08 59 38.36 V C57
2021-12-10 14:53:54 s 1 -39850.875 0 +382527.27 1360.0 C57
2021-12-10 15:03:55 S 11 57 09.888 +08 59 29.58 V C57
2021-12-10 15:03:55 s 1 -40195.618 0 +382412.96 1320.0 C57
2021-12-10 15:13:54 S 11 57 10.704 +08 59 21.26 V C57
2021-12-10 15:13:54 s 1 -40540.265 0 +382297.71 680.0 C57
2021-12-10 15:23:55 S 11 57 11.947 +08 59 07.87 V C57
2021-12-10 15:23:55 s 1 -40884.815 0 +382181.50 9430.0 C57
2021-12-10 15:33:54 S 11 57 13.058 +08 59 01.54 V C57
2021-12-10 15:33:54 s 1 -41229.268 0 +382064.34 7560.0 C57
2021-12-10 16:53:55 S 11 57 21.934 +08 57 39.46 V C57
2021-12-10 16:53:55 s 1 -43981.262 0 +381092.83 9910.0 C57
2021-12-10 17:03:54 S 11 57 22.807 +08 57 35.10 V C57
2021-12-10 17:03:54 s 1 -44324.793 0 +380967.10 2310.0 C57
2021-12-10 17:13:55 S 11 57 23.810 +08 57 22.21 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)