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
2021-12-19 12:43:55 s 1 +169637.72 2 +222327.94 3630.0 C57
2021-12-19 12:53:55 S 12 20 51.883 +05 26 10.39 V C57
2021-12-19 12:53:55 s 1 +169490.94 2 +222943.99 7340.0 C57
2021-12-19 13:03:55 S 12 20 53.098 +05 25 59.23 V C57
2021-12-19 13:03:55 s 1 +169343.12 5 +223558.69 7070.0 C57
2021-12-19 13:13:55 S 12 20 54.372 +05 25 47.17 V C57
2021-12-19 13:13:55 s 1 +169194.27 6 +224172.05 2840.0 C57
2021-12-19 13:23:55 S 12 20 55.478 +05 25 37.49 V C57
2021-12-19 13:23:55 s 1 +169044.40 0 +224784.06 4670.0 C57
2021-12-19 13:33:55 S 12 20 56.938 +05 25 25.82 V C57
2021-12-19 13:33:55 s 1 +168893.50 2 +225394.72 2590.0 C57
2021-12-19 13:43:55 S 12 20 57.857 +05 25 21.90 V C57
2021-12-19 13:43:55 s 1 +168741.58 6 +226004.04 6610.0 C57
2021-12-19 13:53:55 S 12 20 59.191 +05 25 05.23 V C57
2021-12-19 13:53:55 s 1 +168588.65 8 +226612.03 6740.0 C57
2021-12-19 14:53:55 S 12 21 06.355 +05 24 01.15 V C57
2021-12-19 14:53:55 s 1 +167650.08 1 +230231.85 7140.0 C57
2021-12-19 15:03:55 S 12 21 07.610 +05 23 48.55 V C57
2021-12-19 15:03:55 s 1 +167490.19 4 +230830.49 640.0 C57
2021-12-19 15:13:55 S 12 21 08.791 +05 23 37.72 V C57
2021-12-19 15:13:55 s 1 +167329.33 1 +231427.80 410.0 C57
2021-12-19 15:23:55 S 12 21 09.974 +05 23 28.46 V C57
2021-12-19 15:23:55 s 1 +167167.49 7 +232023.78 6470.0 C57
2021-12-19 15:33:55 S 12 21 11.369 +05 23 16.19 V C57
2021-12-19 15:33:55 s 1 +167004.69 6 +232618.44 8830.0 C57
2021-12-19 15:43:55 S 12 21 12.516 +05 23 09.10 V C57
2021-12-19 15:43:55 s 1 +166840.93 3 +233211.77 7520.0 C57
2021-12-19 15:53:55 S 12 21 13.601 +05 22 54.59 V C57
2021-12-19 15:53:55 s 1 +166676.21 2 +233803.78 2550.0 C57
2021-12-19 16:03:55 S 12 21 14.911 +05 22 48.68 V C57
2021-12-19 16:03:55 s 1 +166510.53 7 +234394.47 3930.0 C57
2021-12-19 16:13:55 S 12 21 16.116 +05 22 37.09 V C57
2021-12-19 16:13:55 s 1 +166343.91 3 +234983.84 1700.0 C57
2021-12-19 16:23:55 S 12 21 17.194 +05 22 25.28 V C57
2021-12-19 16:23:55 s 1 +166176.34 4 +235571.89 5850.0 C57
2021-12-19 17:43:55 S 12 21 26.930 +05 20 56.90 V C57
2021-12-19 17:43:55 s 1 +164802.29 2 +240229.02 1330.0 C57
2021-12-19 17:53:55 S 12 21 28.169 +05 20 50.82 V C57
2021-12-19 17:53:55 s 1 +164626.41 1 +240805.27 3800.0 C57
2021-12-19 18:03:55 S 12 21 29.376 +05 20 36.89 V C57
2021-12-19 18:03:55 s 1 +164449.62 7 +241380.22 2840.0 C57
2021-12-19 18:23:55 S 12 21 31.714 +05 20 14.39 V C57
2021-12-19 18:23:55 s 1 +164093.36 7 +242526.21 650.0 C57
2021-12-19 18:33:55 S 12 21 33.046 +05 20 05.14 V C57
2021-12-19 18:33:55 s 1 +163913.89 9 +243097.25 9470.0 C57
2021-12-19 18:43:55 S 12 21 34.193 +05 19 52.97 V C57
2021-12-19 18:43:55 s 1 +163733.54 5 +243667.00 4920.0 C57
2021-12-19 18:53:55 S 12 21 35.498 +05 19 40.66 V C57
2021-12-19 18:53:55 s 1 +163552.30 8 +244235.45 7010.0 C57
2021-12-19 19:03:55 S 12 21 36.461 +05 19 28.49 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)