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
2021-12-13 16:53:54 s 1 -165925.46 5 +231235.01 460.0 C57
2021-12-13 17:13:54 S 12 05 07.459 +07 47 04.06 V C57
2021-12-13 17:13:54 s 1 -166254.75 3 +230045.86 7800.0 C57
2021-12-13 17:53:54 S 12 05 11.782 +07 46 24.74 V C57
2021-12-13 17:53:54 s 1 -166901.98 1 +227651.88 1480.0 C57
2021-12-13 18:03:54 S 12 05 12.773 +07 46 21.40 V C57
2021-12-13 18:03:54 s 1 -167061.39 8 +227050.12 6660.0 C57
2021-12-13 18:23:54 S 12 05 14.801 +07 46 01.06 V C57
2021-12-13 18:23:54 s 1 -167377.33 2 +225842.65 4020.0 C57
2021-12-13 18:33:54 S 12 05 15.898 +07 45 44.24 V C57
2021-12-13 18:33:54 s 1 -167533.84 0 +225236.94 6150.0 C57
2021-12-13 18:43:54 S 12 05 16.915 +07 45 39.82 V C57
2021-12-13 18:43:54 s 1 -167689.36 9 +224629.92 3890.0 C57
2021-12-13 18:53:54 S 12 05 17.890 +07 45 29.84 V C57
2021-12-13 18:53:54 s 1 -167843.91 4 +224021.58 7220.0 C57
2021-12-13 19:13:54 S 12 05 20.090 +07 45 09.18 V C57
2021-12-13 19:13:54 s 1 -168150.03 6 +222800.94 570.0 C57
2021-12-13 19:23:54 S 12 05 21.096 +07 45 00.25 V C57
2021-12-13 19:23:54 s 1 -168301.60 2 +222188.64 550.0 C57
2021-12-13 20:33:54 S 12 05 28.632 +07 43 51.71 V C57
2021-12-13 20:33:54 s 1 -169334.23 0 +217865.37 3540.0 C57
2021-12-13 20:53:54 S 12 05 30.571 +07 43 30.00 V C57
2021-12-13 20:53:54 s 1 -169620.01 0 +216618.17 5850.0 C57
2021-12-13 21:03:54 S 12 05 31.884 +07 43 22.08 V C57
2021-12-13 21:03:54 s 1 -169761.33 3 +215992.56 0.0 C57
2021-12-13 21:13:54 S 12 05 32.942 +07 43 11.03 V C57
2021-12-13 21:13:54 s 1 -169901.60 4 +215365.62 9450.0 C57
2021-12-13 21:23:54 S 12 05 33.883 +07 43 00.44 V C57
2021-12-13 21:23:54 s 1 -170040.81 8 +214737.33 4180.0 C57
2021-12-13 21:33:54 S 12 05 35.040 +07 42 52.06 V C57
2021-12-13 21:33:54 s 1 -170178.97 0 +214107.70 4170.0 C57
2021-12-13 21:43:54 S 12 05 35.926 +07 42 43.78 V C57
2021-12-13 21:43:54 s 1 -170316.05 5 +213476.74 9390.0 C57
2021-12-13 21:53:54 S 12 05 36.972 +07 42 31.97 V C57
2021-12-13 21:53:54 s 1 -170452.06 7 +212844.42 9830.0 C57
2021-12-13 22:03:54 S 12 05 37.975 +07 42 17.46 V C57
2021-12-13 22:03:54 s 1 -170587.00 2 +212210.76 5460.0 C57
2021-12-13 23:13:54 S 12 05 45.413 +07 41 12.26 V C57
2021-12-13 23:13:54 s 1 -171500.92 6 +207737.34 8350.0 C57
2021-12-13 23:23:54 S 12 05 46.646 +07 40 57.50 V C57
2021-12-13 23:23:54 s 1 -171627.04 8 +207092.86 4700.0 C57
2021-12-13 23:33:54 S 12 05 47.690 +07 40 54.55 V C57
2021-12-13 23:33:54 s 1 -171752.04 3 +206447.02 6040.0 C57
2021-12-13 23:43:54 S 12 05 48.713 +07 40 40.73 V C57
2021-12-13 23:43:54 s 1 -171875.90 6 +205799.82 2340.0 C57
2021-12-13 23:53:54 S 12 05 49.769 +07 40 31.55 V C57
2021-12-13 23:53:54 s 1 -171998.63 2 +205151.26 3570.0 C57
2021-12-14 00:03:54 S 12 05 50.770 +07 40 22.33 V C57
2021-12-14 00:03:54 s 1 -172120.21 4 +204501.33 9730.0 C57
2021-12-14 00:13:54 S 12 05 52.063 +07 40 10.67 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)