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
2021-11-17 00:03:56 S 10 57 11.196 +16 47 00.74 V C57
2021-11-17 00:03:56 s 1 -156817.03 8 +230846.22 5350.0 C57
2021-11-17 00:13:56 S 10 57 12.341 +16 46 59.02 V C57
2021-11-17 00:13:56 s 1 -156995.35 1 +230247.89 6850.0 C57
2021-11-17 00:23:56 S 10 57 13.284 +16 46 51.10 V C57
2021-11-17 00:23:56 s 1 -157172.69 5 +229648.14 4490.0 C57
2021-11-17 00:33:56 S 10 57 14.585 +16 46 40.48 V C57
2021-11-17 00:33:56 s 1 -157349.06 5 +229046.95 8250.0 C57
2021-11-17 00:43:56 S 10 57 15.149 +16 46 31.76 V C57
2021-11-17 00:43:56 s 1 -157524.45 6 +228444.35 8100.0 C57
2021-11-17 02:23:56 S 10 57 25.135 +16 45 19.66 V C57
2021-11-17 02:23:56 s 1 -159223.42 3 +222339.32 7860.0 C57
2021-11-17 02:43:56 S 10 57 26.964 +16 45 03.24 V C57
2021-11-17 02:43:56 s 1 -159550.96 0 +221101.00 5050.0 C57
2021-11-17 02:53:56 S 10 57 27.929 +16 45 02.95 V C57
2021-11-17 02:53:56 s 1 -159713.16 2 +220479.66 2420.0 C57
2021-11-17 03:03:56 S 10 57 29.225 +16 44 52.33 V C57
2021-11-17 03:03:56 s 1 -159874.31 3 +219856.87 5620.0 C57
2021-11-17 03:23:56 S 10 57 30.989 +16 44 32.14 V C57
2021-11-17 03:23:56 s 1 -160193.43 9 +218606.91 9390.0 C57
2021-11-17 03:43:56 S 10 57 32.726 +16 44 23.60 V C57
2021-11-17 03:43:56 s 1 -160508.29 4 +217351.11 6210.0 C57
2021-11-17 05:23:56 S 10 57 42.962 +16 43 10.20 V C57
2021-11-17 05:23:56 s 1 -162016.91 6 +210983.96 9830.0 C57
2021-11-17 05:33:56 S 10 57 43.848 +16 43 00.88 V C57
2021-11-17 05:33:56 s 1 -162161.62 2 +210339.12 7800.0 C57
2021-11-17 05:43:56 S 10 57 44.904 +16 42 55.66 V C57
2021-11-17 05:43:56 s 1 -162305.18 5 +209692.79 1230.0 C57
2021-11-17 05:53:56 S 10 57 45.746 +16 42 52.13 V C57
2021-11-17 05:53:56 s 1 -162447.59 9 +209044.98 120.0 C57
2021-11-17 06:03:56 S 10 57 46.882 +16 42 41.98 V C57
2021-11-17 06:03:56 s 1 -162588.85 7 +208395.67 4430.0 C57
2021-11-17 07:53:56 S 10 57 57.682 +16 41 22.70 V C57
2021-11-17 07:53:56 s 1 -164064.67 0 +201154.43 3280.0 C57
2021-11-17 08:03:56 S 10 57 58.555 +16 41 15.72 V C57
2021-11-17 08:03:56 s 1 -164191.57 4 +200487.10 850.0 C57
2021-11-17 08:13:56 S 10 57 59.150 +16 41 04.45 V C57
2021-11-17 08:13:56 s 1 -164317.23 9 +199818.25 3530.0 C57
2021-11-17 08:33:56 S 10 58 01.435 +16 40 54.62 V C57
2021-11-17 08:33:56 s 1 -164564.82 7 +198475.99 4110.0 C57
2021-11-17 08:43:56 S 10 58 02.568 +16 40 46.20 V C57
2021-11-17 08:43:56 s 1 -164686.73 5 +197802.58 1970.0 C57
2021-11-17 08:53:56 S 10 58 03.389 +16 40 33.64 V C57
2021-11-17 08:53:56 s 1 -164807.37 8 +197127.64 4830.0 C57
2021-11-17 10:03:56 S 10 58 10.625 +16 39 49.03 V C57
2021-11-17 10:03:56 s 1 -165615.84 3 +192360.27 2800.0 C57
2021-11-17 10:53:56 S 10 58 15.108 +16 39 08.96 V C57
2021-11-17 10:53:56 s 1 -166153.77 3 +188908.85 9890.0 C57
2021-11-17 11:03:56 S 10 58 16.051 +16 39 02.05 V C57
2021-11-17 11:03:56 s 1 -166257.30 8 +188213.92 5370.0 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)