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
2021-12-01 04:13:55 s 1 -168092.27 5 +126583.77 650.0 C57
2021-12-01 04:23:55 S 11 32 26.993 +12 21 48.06 V C57
2021-12-01 04:23:55 s 1 -168050.30 7 +125754.74 9680.0 C57
2021-12-01 05:53:55 S 11 32 35.911 +12 20 31.52 V C57
2021-12-01 05:53:55 s 1 -167569.70 6 +118217.72 9600.0 C57
2021-12-01 06:03:55 S 11 32 37.073 +12 20 20.47 V C57
2021-12-01 06:03:55 s 1 -167504.58 5 +117371.86 3850.0 C57
2021-12-01 06:13:55 S 11 32 38.172 +12 20 11.11 V C57
2021-12-01 06:13:55 s 1 -167437.06 1 +116524.31 8280.0 C57
2021-12-01 06:23:55 S 11 32 38.923 +12 20 01.79 V C57
2021-12-01 06:23:55 s 1 -167367.11 7 +115675.08 2810.0 C57
2021-12-01 06:33:55 S 11 32 39.866 +12 19 58.15 V C57
2021-12-01 06:33:55 s 1 -167294.73 7 +114824.16 7380.0 C57
2021-12-01 06:43:55 S 11 32 40.970 +12 19 46.38 V C57
2021-12-01 06:43:55 s 1 -167219.90 2 +113971.56 1930.0 C57
2021-12-01 08:23:55 S 11 32 51.108 +12 18 28.04 V C57
2021-12-01 08:23:55 s 1 -166332.75 3 +105352.89 710.0 C57
2021-12-01 08:53:55 S 11 32 53.964 +12 17 55.68 V C57
2021-12-01 08:53:55 s 1 -166015.74 5 +102734.48 6890.0 C57
2021-12-01 09:03:55 S 11 32 54.766 +12 17 48.41 V C57
2021-12-01 09:03:55 s 1 -165904.68 3 +101858.33 3640.0 C57
2021-12-01 09:13:55 S 11 32 55.872 +12 17 41.14 V C57
2021-12-01 09:13:55 s 1 -165790.89 3 +100980.49 9290.0 C57
2021-12-01 09:23:55 S 11 32 56.623 +12 17 32.75 V C57
2021-12-01 09:23:55 s 1 -165674.35 4 +100100.97 3740.0 C57
2021-12-01 09:33:55 S 11 32 58.063 +12 17 24.29 V C57
2021-12-01 09:33:55 s 1 -165555.04 7 +99219.791 6920.0 C57
2021-12-01 11:13:55 S 11 33 07.726 +12 16 01.31 V C57
2021-12-01 11:13:55 s 1 -164205.16 6 +90316.145 880.0 C57
2021-12-01 11:23:55 S 11 33 08.606 +12 15 49.86 V C57
2021-12-01 11:23:55 s 1 -164054.02 7 +89416.647 4640.0 C57
2021-12-01 11:33:55 S 11 33 09.670 +12 15 44.35 V C57
2021-12-01 11:33:55 s 1 -163899.86 4 +88515.496 6130.0 C57
2021-12-01 11:43:55 S 11 33 10.634 +12 15 31.72 V C57
2021-12-01 11:43:55 s 1 -163742.65 4 +87612.697 5240.0 C57
2021-12-01 11:53:55 S 11 33 11.635 +12 15 23.04 V C57
2021-12-01 11:53:55 s 1 -163582.37 3 +86708.252 1890.0 C57
2021-12-01 12:03:55 S 11 33 12.797 +12 15 18.86 V C57
2021-12-01 12:03:55 s 1 -163418.99 8 +85802.164 5990.0 C57
2021-12-01 12:13:55 S 11 33 13.946 +12 15 07.67 V C57
2021-12-01 12:13:55 s 1 -163252.50 7 +84894.436 7450.0 C57
2021-12-01 13:43:55 S 11 33 22.289 +12 13 49.15 V C57
2021-12-01 13:43:55 s 1 -161609.81 7 +76651.676 5900.0 C57
2021-12-01 14:03:55 S 11 33 24.324 +12 13 39.07 V C57
2021-12-01 14:03:55 s 1 -161208.40 8 +74802.236 1640.0 C57
2021-12-01 14:13:55 S 11 33 25.469 +12 13 29.86 V C57
2021-12-01 14:13:55 s 1 -161002.58 9 +73875.128 3830.0 C57
2021-12-01 14:23:55 S 11 33 26.683 +12 13 18.70 V C57
2021-12-01 14:23:55 s 1 -160793.32 5 +72946.434 2080.0 C57
2021-12-01 14:33:55 S 11 33 27.646 +12 13 11.53 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)