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
2021-11-10 06:53:56 s 1 +144665.36 9 +281362.20 1870.0 C57
2021-11-10 07:03:56 S 10 40 51.588 +18 38 54.13 V C57
2021-11-10 07:03:56 s 1 +144425.67 0 +281826.43 570.0 C57
2021-11-10 07:33:56 S 10 40 54.586 +18 38 36.78 V C57
2021-11-10 07:33:56 s 1 +143702.79 8 +283211.81 3680.0 C57
2021-11-10 08:53:56 S 10 41 02.921 +18 37 37.49 V C57
2021-11-10 08:53:56 s 1 +141747.92 3 +286852.58 5070.0 C57
2021-11-10 09:03:56 S 10 41 04.063 +18 37 32.52 V C57
2021-11-10 09:03:56 s 1 +141500.82 8 +287302.23 8340.0 C57
2021-11-10 09:13:56 S 10 41 05.258 +18 37 30.32 V C57
2021-11-10 09:13:56 s 1 +141253.13 4 +287750.66 9550.0 C57
2021-11-10 09:23:56 S 10 41 06.401 +18 37 22.98 V C57
2021-11-10 09:23:56 s 1 +141004.84 3 +288197.89 8710.0 C57
2021-11-10 09:33:56 S 10 41 07.325 +18 37 18.48 V C57
2021-11-10 09:33:56 s 1 +140755.95 8 +288643.91 5840.0 C57
2021-11-10 11:53:56 S 10 41 21.938 +18 35 44.23 V C57
2021-11-10 11:53:56 s 1 +137210.59 0 +294762.28 6370.0 C57
2021-11-10 12:03:56 S 10 41 23.165 +18 35 38.94 V C57
2021-11-10 12:03:56 s 1 +136953.09 3 +295190.36 3960.0 C57
2021-11-10 14:03:56 S 10 41 35.868 +18 34 14.81 V C57
2021-11-10 14:03:56 s 1 +133820.52 6 +300235.03 9220.0 C57
2021-11-10 14:13:56 S 10 41 36.922 +18 34 11.21 V C57
2021-11-10 14:13:56 s 1 +133555.99 9 +300647.76 2760.0 C57
2021-11-10 14:23:56 S 10 41 37.646 +18 34 04.87 V C57
2021-11-10 14:23:56 s 1 +133290.94 7 +301059.32 4510.0 C57
2021-11-10 14:33:56 S 10 41 38.609 +18 33 57.96 V C57
2021-11-10 14:33:56 s 1 +133025.37 3 +301469.71 4470.0 C57
2021-11-10 14:53:56 S 10 41 40.411 +18 33 46.22 V C57
2021-11-10 14:53:56 s 1 +132492.66 5 +302286.98 9060.0 C57
2021-11-10 16:53:56 S 10 41 53.328 +18 32 26.09 V C57
2021-11-10 16:53:56 s 1 +129253.69 7 +307092.73 860.0 C57
2021-11-10 17:03:56 S 10 41 54.175 +18 32 17.48 V C57
2021-11-10 17:03:56 s 1 +128980.54 7 +307485.67 4980.0 C57
2021-11-10 17:13:56 S 10 41 55.102 +18 32 14.06 V C57
2021-11-10 17:13:56 s 1 +128706.90 8 +307877.45 7440.0 C57
2021-11-10 17:23:56 S 10 41 56.050 +18 32 05.21 V C57
2021-11-10 17:23:56 s 1 +128432.78 4 +308268.09 8240.0 C57
2021-11-10 17:53:56 S 10 41 59.695 +18 31 47.28 V C57
2021-11-10 17:53:56 s 1 +127607.51 5 +309433.07 790.0 C57
2021-11-10 19:53:56 S 10 42 11.906 +18 30 23.40 V C57
2021-11-10 19:53:56 s 1 +124263.98 6 +313989.75 6650.0 C57
2021-11-10 20:13:56 S 10 42 13.834 +18 30 06.16 V C57
2021-11-10 20:13:56 s 1 +123700.28 4 +314733.22 5740.0 C57
2021-11-10 21:43:56 S 10 42 23.424 +18 29 15.18 V C57
2021-11-10 21:43:56 s 1 +121141.57 1 +318022.65 1880.0 C57
2021-11-10 21:53:56 S 10 42 24.643 +18 28 59.77 V C57
2021-11-10 21:53:56 s 1 +120855.08 0 +318382.49 700.0 C57
2021-11-10 22:13:56 S 10 42 26.570 +18 28 51.64 V C57
2021-11-10 22:13:56 s 1 +120280.80 5 +319098.79 3980.0 C57
2021-11-10 22:33:56 S 10 42 28.882 +18 28 35.58 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)