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 21:33:54 s 1 -141406.44 0 +291649.87 2230.0 C57
2021-12-12 21:43:54 S 12 03 02.940 +08 06 24.08 V C57
2021-12-12 21:43:54 s 1 -141656.10 4 +291198.02 8930.0 C57
2021-12-12 21:53:54 S 12 03 04.018 +08 06 11.74 V C57
2021-12-12 21:53:54 s 1 -141905.20 8 +290745.01 3020.0 C57
2021-12-12 22:03:54 S 12 03 05.237 +08 06 03.35 V C57
2021-12-12 22:03:54 s 1 -142153.74 8 +290290.84 4480.0 C57
2021-12-12 22:13:54 S 12 03 06.254 +08 05 57.59 V C57
2021-12-12 22:13:54 s 1 -142401.72 2 +289835.52 3320.0 C57
2021-12-12 22:23:54 S 12 03 07.426 +08 05 41.32 V C57
2021-12-12 22:23:54 s 1 -142649.12 9 +289379.04 9520.0 C57
2021-12-12 22:43:54 S 12 03 09.432 +08 05 24.72 V C57
2021-12-12 22:43:54 s 1 -143142.22 8 +288462.60 3960.0 C57
2021-12-12 23:33:54 S 12 03 14.983 +08 04 34.75 V C57
2021-12-12 23:33:54 s 1 -144364.86 2 +286151.16 8110.0 C57
2021-12-12 23:43:54 S 12 03 15.595 +08 04 23.12 V C57
2021-12-12 23:43:54 s 1 -144607.63 5 +285685.37 2810.0 C57
2021-12-12 23:53:54 S 12 03 16.817 +08 04 17.08 V C57
2021-12-12 23:53:54 s 1 -144849.81 8 +285218.42 4770.0 C57
2021-12-13 00:03:54 S 12 03 17.974 +08 04 03.79 V C57
2021-12-13 00:03:54 s 1 -145091.40 7 +284750.30 3980.0 C57
2021-12-13 00:13:54 S 12 03 19.010 +08 03 55.22 V C57
2021-12-13 00:13:54 s 1 -145332.40 1 +284281.01 440.0 C57
2021-12-13 00:23:54 S 12 03 20.105 +08 03 46.69 V C57
2021-12-13 00:23:54 s 1 -145572.79 7 +283810.54 4130.0 C57
2021-12-13 00:33:54 S 12 03 21.014 +08 03 38.59 V C57
2021-12-13 00:33:54 s 1 -145812.59 3 +283338.91 5040.0 C57
2021-12-13 00:43:54 S 12 03 22.181 +08 03 24.55 V C57
2021-12-13 00:43:54 s 1 -146051.78 5 +282866.10 3160.0 C57
2021-12-13 00:53:54 S 12 03 23.376 +08 03 17.39 V C57
2021-12-13 00:53:54 s 1 -146290.37 1 +282392.11 8480.0 C57
2021-12-13 01:03:54 S 12 03 24.228 +08 03 08.35 V C57
2021-12-13 01:03:54 s 1 -146528.34 8 +281916.95 990.0 C57
2021-12-13 02:33:54 S 12 03 33.936 +08 01 39.58 V C57
2021-12-13 02:33:54 s 1 -148642.32 7 +277587.39 5070.0 C57
2021-12-13 02:43:54 S 12 03 34.870 +08 01 27.84 V C57
2021-12-13 02:43:54 s 1 -148874.07 3 +277100.40 8820.0 C57
2021-12-13 02:53:54 S 12 03 36.070 +08 01 18.59 V C57
2021-12-13 02:53:54 s 1 -149105.18 1 +276612.23 9620.0 C57
2021-12-13 03:03:54 S 12 03 37.118 +08 01 07.57 V C57
2021-12-13 03:03:54 s 1 -149335.64 8 +276122.86 7480.0 C57
2021-12-13 03:13:54 S 12 03 38.328 +08 00 56.38 V C57
2021-12-13 03:13:54 s 1 -149565.47 1 +275632.30 2370.0 C57
2021-12-13 03:23:54 S 12 03 39.192 +08 00 48.42 V C57
2021-12-13 03:23:54 s 1 -149794.64 8 +275140.55 4290.0 C57
2021-12-13 03:33:54 S 12 03 40.370 +08 00 38.09 V C57
2021-12-13 03:33:54 s 1 -150023.17 6 +274647.61 3220.0 C57
2021-12-13 03:43:54 S 12 03 41.602 +08 00 26.03 V C57
2021-12-13 03:43:54 s 1 -150251.05 2 +274153.47 9140.0 C57
2021-12-13 04:43:54 S 12 03 48.079 +07 59 31.56 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)