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 14:33:54 s 1 -130444.40 5 +309599.01 5310.0 C57
2021-12-12 15:21:03 C 12 01 55.20 +08 13 35.7 V T08
2021-12-12 15:27:01 C 12 01 55.82 +08 13 29.9 V T08
2021-12-12 15:34:27 C 12 01 56.60 +08 13 22.4 V T08
2021-12-12 15:53:15 C 12 01 58.68 +08 13 03.3 V T08
2021-12-12 15:53:54 S 12 02 25.889 +08 12 02.66 V C57
2021-12-12 15:53:54 s 1 -132600.63 0 +306333.45 3040.0 C57
2021-12-12 16:03:54 S 12 02 26.674 +08 11 58.16 V C57
2021-12-12 16:03:54 s 1 -132868.00 6 +305920.23 2610.0 C57
2021-12-12 16:13:54 S 12 02 27.696 +08 11 44.77 V C57
2021-12-12 16:13:54 s 1 -133134.89 7 +305505.89 9900.0 C57
2021-12-12 16:23:54 S 12 02 28.622 +08 11 35.27 V C57
2021-12-12 16:23:54 s 1 -133401.30 0 +305090.43 4900.0 C57
2021-12-12 16:33:54 S 12 02 29.810 +08 11 29.62 V C57
2021-12-12 16:33:54 s 1 -133667.21 5 +304673.85 7590.0 C57
2021-12-12 16:43:54 S 12 02 30.871 +08 11 17.23 V C57
2021-12-12 16:43:54 s 1 -133932.63 8 +304256.14 7970.0 C57
2021-12-12 16:53:54 S 12 02 31.846 +08 11 05.71 V C57
2021-12-12 16:53:54 s 1 -134197.56 7 +303837.32 6040.0 C57
2021-12-12 17:03:54 S 12 02 33.089 +08 10 57.54 V C57
2021-12-12 17:03:54 s 1 -134462.00 1 +303417.36 1770.0 C57
2021-12-12 17:13:54 S 12 02 34.176 +08 10 50.12 V C57
2021-12-12 17:13:54 s 1 -134725.93 7 +302996.29 5170.0 C57
2021-12-12 17:23:54 S 12 02 35.249 +08 10 36.55 V C57
2021-12-12 17:23:54 s 1 -134989.37 4 +302574.08 6220.0 C57
2021-12-12 17:33:54 S 12 02 36.197 +08 10 28.96 V C57
2021-12-12 17:33:54 s 1 -135252.30 8 +302150.75 4910.0 C57
2021-12-12 18:43:54 S 12 02 43.726 +08 09 18.58 V C57
2021-12-12 18:43:54 s 1 -137078.61 4 +299155.78 9030.0 C57
2021-12-12 18:53:54 S 12 02 44.882 +08 09 10.44 V C57
2021-12-12 18:53:54 s 1 -137337.45 6 +298723.39 8540.0 C57
2021-12-12 19:03:54 S 12 02 45.797 +08 08 59.35 V C57
2021-12-12 19:03:54 s 1 -137595.77 5 +298289.86 5610.0 C57
2021-12-12 19:13:54 S 12 02 46.978 +08 08 53.52 V C57
2021-12-12 19:13:54 s 1 -137853.57 1 +297855.20 230.0 C57
2021-12-12 19:23:54 S 12 02 48.197 +08 08 40.38 V C57
2021-12-12 19:23:54 s 1 -138110.84 0 +297419.40 2390.0 C57
2021-12-12 19:33:54 S 12 02 49.104 +08 08 29.62 V C57
2021-12-12 19:33:54 s 1 -138367.58 2 +296982.46 2090.0 C57
2021-12-12 19:43:54 S 12 02 50.292 +08 08 24.83 V C57
2021-12-12 19:43:54 s 1 -138623.79 3 +296544.37 9300.0 C57
2021-12-12 19:53:54 S 12 02 51.226 +08 08 10.50 V C57
2021-12-12 19:53:54 s 1 -138879.47 1 +296105.15 4030.0 C57
2021-12-12 20:03:54 S 12 02 52.246 +08 08 00.64 V C57
2021-12-12 20:03:54 s 1 -139134.61 4 +295664.78 6250.0 C57
2021-12-12 21:13:54 S 12 02 59.654 +08 06 48.42 V C57
2021-12-12 21:13:54 s 1 -140905.43 8 +292550.12 1060.0 C57
2021-12-12 21:23:54 S 12 03 00.814 +08 06 43.02 V C57
2021-12-12 21:23:54 s 1 -141156.21 7 +292100.58 2940.0 C57
2021-12-12 21:33:54 S 12 03 02.004 +08 06 30.46 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)