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
2021-12-26 15:03:54 S 12 41 09.343 +02 12 23.22 V C57
2021-12-26 15:03:54 s 1 -145603.23 5 +288387.61 7220.0 C57
2021-12-26 15:13:54 S 12 41 10.471 +02 12 12.49 V C57
2021-12-26 15:13:54 s 1 -145852.66 4 +287930.73 900.0 C57
2021-12-26 15:23:54 S 12 41 11.606 +02 11 58.74 V C57
2021-12-26 15:23:54 s 1 -146101.50 8 +287472.72 1770.0 C57
2021-12-26 15:33:54 S 12 41 12.708 +02 11 47.11 V C57
2021-12-26 15:33:54 s 1 -146349.76 6 +287013.56 9810.0 C57
2021-12-26 15:43:54 S 12 41 13.910 +02 11 34.69 V C57
2021-12-26 15:43:54 s 1 -146597.43 4 +286553.25 5010.0 C57
2021-12-26 15:53:54 S 12 41 15.276 +02 11 20.98 V C57
2021-12-26 15:53:54 s 1 -146844.50 9 +286091.79 7360.0 C57
2021-12-26 16:33:54 S 12 41 19.930 +02 10 34.57 V C57
2021-12-26 16:33:54 s 1 -147826.84 3 +284234.47 8050.0 C57
2021-12-26 16:43:54 S 12 41 21.079 +02 10 24.06 V C57
2021-12-26 16:43:54 s 1 -148070.92 2 +283767.26 5990.0 C57
2021-12-26 16:53:54 S 12 41 22.380 +02 10 11.78 V C57
2021-12-26 16:53:54 s 1 -148314.39 3 +283298.89 1020.0 C57
2021-12-26 17:03:54 S 12 41 23.515 +02 09 59.65 V C57
2021-12-26 17:03:54 s 1 -148557.25 6 +282829.37 3120.0 C57
2021-12-26 17:23:54 S 12 41 25.836 +02 09 33.08 V C57
2021-12-26 17:23:54 s 1 -149041.14 2 +281886.87 8480.0 C57
2021-12-26 17:33:54 S 12 41 26.978 +02 09 23.18 V C57
2021-12-26 17:33:54 s 1 -149282.16 1 +281413.88 1730.0 C57
2021-12-26 17:43:54 S 12 41 28.181 +02 09 11.92 V C57
2021-12-26 17:43:54 s 1 -149522.56 1 +280939.73 2010.0 C57
2021-12-26 17:53:54 S 12 41 29.381 +02 09 00.68 V C57
2021-12-26 17:53:54 s 1 -149762.33 8 +280464.43 9300.0 C57
2021-12-26 18:03:54 S 12 41 30.629 +02 08 47.58 V C57
2021-12-26 18:03:54 s 1 -150001.49 0 +279987.96 3600.0 C57
2021-12-26 18:13:54 S 12 41 31.594 +02 08 34.55 V C57
2021-12-26 18:13:54 s 1 -150240.01 6 +279510.33 4890.0 C57
2021-12-26 18:23:54 S 12 41 32.640 +02 08 19.39 V C57
2021-12-26 18:23:54 s 1 -150477.91 1 +279031.54 3170.0 C57
2021-12-26 18:43:54 S 12 41 35.215 +02 07 54.30 V C57
2021-12-26 18:43:54 s 1 -150951.80 1 +278070.47 610.0 C57
2021-12-26 19:13:54 S 12 41 38.844 +02 07 20.89 V C57
2021-12-26 19:13:54 s 1 -151657.84 5 +276620.11 8850.0 C57
2021-12-26 19:23:54 S 12 41 39.859 +02 07 09.19 V C57
2021-12-26 19:23:54 s 1 -151891.90 5 +276134.32 8770.0 C57
2021-12-26 19:33:54 S 12 41 41.162 +02 06 59.00 V C57
2021-12-26 19:33:54 s 1 -152125.31 7 +275647.36 5590.0 C57
2021-12-26 19:43:54 S 12 41 42.264 +02 06 47.81 V C57
2021-12-26 19:43:54 s 1 -152358.07 7 +275159.23 9290.0 C57
2021-12-26 19:53:54 S 12 41 43.550 +02 06 35.03 V C57
2021-12-26 19:53:54 s 1 -152590.18 3 +274669.93 9870.0 C57
2021-12-26 20:03:54 S 12 41 44.635 +02 06 23.58 V C57
2021-12-26 20:03:54 s 1 -152821.63 3 +274179.46 7310.0 C57
2021-12-26 20:13:54 S 12 41 45.720 +02 06 10.62 V C57
2021-12-26 20:13:54 s 1 -153052.42 3 +273687.81 1600.0 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)