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
2021-12-20 15:33:55 s 1 +135339.01 4 +305109.63 8970.0 C57
2021-12-20 15:53:55 S 12 24 07.001 +04 56 49.31 V C57
2021-12-20 15:53:55 s 1 +134806.01 6 +305941.67 6220.0 C57
2021-12-20 16:03:55 S 12 24 08.278 +04 56 40.52 V C57
2021-12-20 16:03:55 s 1 +134538.74 5 +306355.98 7040.0 C57
2021-12-20 16:53:55 S 12 24 13.994 +04 55 43.39 V C57
2021-12-20 16:53:55 s 1 +133194.76 8 +308410.43 3390.0 C57
2021-12-20 17:03:55 S 12 24 15.358 +04 55 33.60 V C57
2021-12-20 17:03:55 s 1 +132924.46 2 +308817.91 3180.0 C57
2021-12-20 17:13:55 S 12 24 16.661 +04 55 22.15 V C57
2021-12-20 17:13:55 s 1 +132653.65 7 +309224.25 1150.0 C57
2021-12-20 17:23:55 S 12 24 17.798 +04 55 11.17 V C57
2021-12-20 17:23:55 s 1 +132382.35 6 +309629.46 7320.0 C57
2021-12-20 17:33:55 S 12 24 18.926 +04 55 02.82 V C57
2021-12-20 17:33:55 s 1 +132110.56 0 +310033.54 1700.0 C57
2021-12-20 17:43:55 S 12 24 20.124 +04 54 50.33 V C57
2021-12-20 17:43:55 s 1 +131838.27 2 +310436.48 4300.0 C57
2021-12-20 17:53:55 S 12 24 21.310 +04 54 36.18 V C57
2021-12-20 17:53:55 s 1 +131565.49 3 +310838.30 5120.0 C57
2021-12-20 18:03:55 S 12 24 22.666 +04 54 28.30 V C57
2021-12-20 18:03:55 s 1 +131292.22 5 +311238.98 4170.0 C57
2021-12-20 18:13:55 S 12 24 23.839 +04 54 16.02 V C57
2021-12-20 18:13:55 s 1 +131018.47 2 +311638.53 1460.0 C57
2021-12-20 18:23:55 S 12 24 24.960 +04 54 08.53 V C57
2021-12-20 18:23:55 s 1 +130744.23 3 +312036.96 7000.0 C57
2021-12-20 18:33:55 S 12 24 26.203 +04 53 52.12 V C57
2021-12-20 18:33:55 s 1 +130469.51 3 +312434.26 790.0 C57
2021-12-20 18:43:55 S 12 24 27.413 +04 53 43.84 V C57
2021-12-20 18:43:55 s 1 +130194.31 2 +312830.43 2850.0 C57
2021-12-20 18:53:55 S 12 24 28.637 +04 53 30.77 V C57
2021-12-20 18:53:55 s 1 +129918.63 2 +313225.48 3180.0 C57
2021-12-20 19:33:55 S 12 24 33.101 +04 52 47.32 V C57
2021-12-20 19:33:55 s 1 +128811.17 0 +314794.43 7390.0 C57
2021-12-20 19:43:55 S 12 24 34.824 +04 52 43.10 V C57
2021-12-20 19:43:55 s 1 +128533.12 8 +315183.87 9200.0 C57
2021-12-20 19:53:55 S 12 24 35.729 +04 52 24.60 V C57
2021-12-20 19:53:55 s 1 +128254.61 9 +315572.18 9330.0 C57
2021-12-20 20:03:55 S 12 24 36.982 +04 52 15.20 V C57
2021-12-20 20:03:55 s 1 +127975.64 6 +315959.38 7790.0 C57
2021-12-20 20:13:55 S 12 24 38.290 +04 52 05.12 V C57
2021-12-20 20:13:55 s 1 +127696.21 0 +316345.46 4580.0 C57
2021-12-20 20:23:55 S 12 24 39.473 +04 51 53.03 V C57
2021-12-20 20:23:55 s 1 +127416.31 3 +316730.42 9720.0 C57
2021-12-20 20:33:55 S 12 24 40.702 +04 51 43.85 V C57
2021-12-20 20:33:55 s 1 +127135.95 7 +317114.26 3210.0 C57
2021-12-20 20:43:55 S 12 24 41.700 +04 51 28.62 V C57
2021-12-20 20:43:55 s 1 +126855.14 4 +317496.99 5060.0 C57
2021-12-20 20:53:55 S 12 24 42.785 +04 51 19.51 V C57
2021-12-20 20:53:55 s 1 +126573.87 6 +317878.61 5270.0 C57
2021-12-20 21:03:55 S 12 24 44.206 +04 51 08.93 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)