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
2021-12-12 06:53:54 s 1 -117496.20 3 +327010.57 8230.0 C57
2021-12-12 08:13:54 S 12 01 36.355 +08 19 38.60 V C57
2021-12-12 08:13:54 s 1 -119811.05 4 +324147.51 780.0 C57
2021-12-12 08:23:54 S 12 01 37.339 +08 19 28.27 V C57
2021-12-12 08:23:54 s 1 -120098.64 4 +323784.79 6370.0 C57
2021-12-12 08:43:54 S 12 01 39.396 +08 19 12.04 V C57
2021-12-12 08:43:54 s 1 -120672.62 7 +323056.11 1800.0 C57
2021-12-12 08:53:54 S 12 01 40.591 +08 18 57.74 V C57
2021-12-12 08:53:54 s 1 -120959.01 7 +322690.15 1630.0 C57
2021-12-12 09:03:54 S 12 01 41.393 +08 18 54.40 V C57
2021-12-12 09:03:54 s 1 -121245.00 3 +322323.12 9530.0 C57
2021-12-12 09:13:54 S 12 01 42.905 +08 18 42.95 V C57
2021-12-12 09:13:54 s 1 -121530.58 4 +321955.00 5490.0 C57
2021-12-12 09:23:54 S 12 01 43.874 +08 18 31.97 V C57
2021-12-12 09:23:54 s 1 -121815.75 8 +321585.80 9500.0 C57
2021-12-12 09:33:54 S 12 01 44.990 +08 18 21.17 V C57
2021-12-12 09:33:54 s 1 -122100.52 4 +321215.51 1560.0 C57
2021-12-12 10:23:54 S 12 01 50.170 +08 17 32.86 V C57
2021-12-12 10:23:54 s 1 -123518.15 7 +319347.81 2250.0 C57
2021-12-12 10:33:54 S 12 01 51.576 +08 17 18.10 V C57
2021-12-12 10:33:54 s 1 -123800.43 3 +318971.01 2410.0 C57
2021-12-12 11:03:54 S 12 01 54.454 +08 16 49.33 V C57
2021-12-12 11:03:54 s 1 -124644.72 5 +317834.07 820.0 C57
2021-12-12 11:13:54 S 12 01 55.510 +08 16 42.96 V C57
2021-12-12 11:13:54 s 1 -124925.30 4 +317452.91 2900.0 C57
2021-12-12 11:23:54 S 12 01 56.530 +08 16 33.67 V C57
2021-12-12 11:23:54 s 1 -125205.45 5 +317070.65 2950.0 C57
2021-12-12 11:33:54 S 12 01 57.710 +08 16 21.43 V C57
2021-12-12 11:33:54 s 1 -125485.17 6 +316687.30 940.0 C57
2021-12-12 11:43:54 S 12 01 58.908 +08 16 09.52 V C57
2021-12-12 11:43:54 s 1 -125764.46 4 +316302.86 6880.0 C57
2021-12-12 11:53:54 S 12 01 59.827 +08 16 03.50 V C57
2021-12-12 11:53:54 s 1 -126043.31 9 +315917.32 750.0 C57
2021-12-12 12:03:54 S 12 02 00.842 +08 15 51.98 V C57
2021-12-12 12:03:54 s 1 -126321.73 7 +315530.69 2550.0 C57
2021-12-12 13:13:54 S 12 02 08.489 +08 14 43.30 V C57
2021-12-12 13:13:54 s 1 -128258.30 0 +312793.48 6440.0 C57
2021-12-12 13:23:54 S 12 02 09.643 +08 14 27.96 V C57
2021-12-12 13:23:54 s 1 -128533.16 3 +312398.04 1370.0 C57
2021-12-12 13:33:54 S 12 02 10.742 +08 14 22.63 V C57
2021-12-12 13:33:54 s 1 -128807.57 2 +312001.50 4150.0 C57
2021-12-12 13:53:54 S 12 02 12.691 +08 14 01.46 V C57
2021-12-12 13:53:54 s 1 -129355.02 4 +311205.10 3250.0 C57
2021-12-12 14:03:54 S 12 02 13.807 +08 13 55.88 V C57
2021-12-12 14:03:54 s 1 -129628.06 3 +310805.24 9540.0 C57
2021-12-12 14:13:54 S 12 02 15.005 +08 13 45.88 V C57
2021-12-12 14:13:54 s 1 -129900.64 1 +310404.28 3660.0 C57
2021-12-12 14:23:54 S 12 02 15.845 +08 13 33.78 V C57
2021-12-12 14:23:54 s 1 -130172.75 5 +310002.20 5580.0 C57
2021-12-12 14:33:54 S 12 02 16.836 +08 13 26.76 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)