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
2021-12-23 17:53:54 S 12 32 57.773 +03 33 38.34 V C57
2021-12-23 17:53:54 s 1 -12151.066 0 +387484.53 2250.0 C57
2021-12-23 18:03:54 S 12 32 58.807 +03 33 19.80 V C57
2021-12-23 18:03:54 s 1 -12507.820 0 +387449.94 5350.0 C57
2021-12-23 18:13:54 S 12 33 00.041 +03 33 13.46 V C57
2021-12-23 18:13:54 s 1 -12864.545 0 +387414.39 8090.0 C57
2021-12-23 18:23:54 S 12 33 01.286 +03 33 00.50 V C57
2021-12-23 18:23:54 s 1 -13221.241 0 +387377.89 460.0 C57
2021-12-23 18:33:54 S 12 33 02.561 +03 32 49.45 V C57
2021-12-23 18:33:54 s 1 -13577.907 0 +387340.43 2460.0 C57
2021-12-23 19:23:54 S 12 33 08.345 +03 31 53.22 V C57
2021-12-23 19:23:54 s 1 -15360.749 0 +387138.83 6710.0 C57
2021-12-23 19:33:54 S 12 33 09.528 +03 31 38.96 V C57
2021-12-23 19:33:54 s 1 -15717.214 0 +387095.65 6380.0 C57
2021-12-23 19:53:54 S 12 33 12.125 +03 31 17.83 V C57
2021-12-23 19:53:54 s 1 -16430.033 0 +387006.41 4530.0 C57
2021-12-23 21:13:54 S 12 33 21.480 +03 29 44.23 V C57
2021-12-23 21:13:54 s 1 -19279.697 0 +386611.27 470.0 C57
2021-12-23 21:23:54 S 12 33 22.670 +03 29 32.75 V C57
2021-12-23 21:23:54 s 1 -19635.709 0 +386557.57 5520.0 C57
2021-12-23 21:33:54 S 12 33 23.849 +03 29 21.34 V C57
2021-12-23 21:33:54 s 1 -19991.674 0 +386502.92 130.0 C57
2021-12-23 21:43:54 S 12 33 24.998 +03 29 09.67 V C57
2021-12-23 21:43:54 s 1 -20347.592 0 +386447.32 4300.0 C57
2021-12-23 21:53:54 S 12 33 26.374 +03 28 58.01 V C57
2021-12-23 21:53:54 s 1 -20703.461 0 +386390.76 8010.0 C57
2021-12-23 22:03:54 S 12 33 27.389 +03 28 49.22 V C57
2021-12-23 22:03:54 s 1 -21059.281 0 +386333.24 1270.0 C57
2021-12-23 22:13:54 S 12 33 28.541 +03 28 34.97 V C57
2021-12-23 22:13:54 s 1 -21415.050 0 +386274.77 4070.0 C57
2021-12-23 23:13:54 S 12 33 35.443 +03 27 26.21 V C57
2021-12-23 23:13:54 s 1 -23548.561 0 +385903.86 1020.0 C57
2021-12-23 23:23:54 S 12 33 36.934 +03 27 14.15 V C57
2021-12-23 23:23:54 s 1 -23903.953 0 +385838.69 490.0 C57
2021-12-23 23:33:54 S 12 33 38.105 +03 27 07.27 V C57
2021-12-23 23:33:54 s 1 -24259.287 0 +385772.57 9480.0 C57
2021-12-23 23:43:54 S 12 33 39.485 +03 26 52.98 V C57
2021-12-23 23:43:54 s 1 -24614.563 0 +385705.49 7970.0 C57
2021-12-23 23:53:54 S 12 33 40.627 +03 26 41.68 V C57
2021-12-23 23:53:54 s 1 -24969.780 0 +385637.45 5970.0 C57
2021-12-24 00:03:54 S 12 33 41.626 +03 26 28.72 V C57
2021-12-24 00:03:54 s 1 -25324.936 0 +385568.46 3460.0 C57
2021-12-24 00:23:54 S 12 33 44.086 +03 26 03.95 V C57
2021-12-24 00:23:54 s 1 -26035.063 0 +385427.60 6920.0 C57
2021-12-24 00:33:54 S 12 33 45.322 +03 25 54.48 V C57
2021-12-24 00:33:54 s 1 -26390.033 0 +385355.74 2880.0 C57
2021-12-24 00:53:54 S 12 33 47.530 +03 25 30.68 V C57
2021-12-24 00:53:54 s 1 -27099.779 0 +385209.13 3250.0 C57
2021-12-24 01:03:54 S 12 33 48.871 +03 25 16.90 V C57
2021-12-24 01:03:54 s 1 -27454.554 0 +385134.40 7640.0 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)