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
2021-12-20 21:03:55 s 1 +126292.15 5 +318259.11 3860.0 C57
2021-12-20 22:13:54 S 12 24 52.582 +04 49 48.65 V C57
2021-12-20 22:13:54 s 1 +124307.57 3 +320891.52 9090.0 C57
2021-12-20 22:23:55 S 12 24 53.842 +04 49 41.41 V C57
2021-12-20 22:23:55 s 1 +124022.29 3 +321263.15 4940.0 C57
2021-12-20 22:33:55 S 12 24 55.111 +04 49 30.86 V C57
2021-12-20 22:33:55 s 1 +123736.57 6 +321633.67 9230.0 C57
2021-12-20 22:43:55 S 12 24 56.201 +04 49 21.04 V C57
2021-12-20 22:43:55 s 1 +123450.42 5 +322003.09 1970.0 C57
2021-12-20 22:53:55 S 12 24 57.526 +04 49 07.61 V C57
2021-12-20 22:53:55 s 1 +123163.84 1 +322371.40 3170.0 C57
2021-12-20 23:03:55 S 12 24 58.728 +04 48 57.38 V C57
2021-12-20 23:03:55 s 1 +122876.82 6 +322738.61 2840.0 C57
2021-12-20 23:13:55 S 12 24 59.890 +04 48 47.84 V C57
2021-12-20 23:13:55 s 1 +122589.38 1 +323104.72 970.0 C57
2021-12-20 23:23:55 S 12 25 01.020 +04 48 36.50 V C57
2021-12-20 23:23:55 s 1 +122301.50 9 +323469.72 7580.0 C57
2021-12-20 23:43:54 S 12 25 03.552 +04 48 12.42 V C57
2021-12-20 23:43:54 s 1 +121724.49 0 +324196.43 6270.0 C57
2021-12-20 23:53:55 S 12 25 04.687 +04 48 00.36 V C57
2021-12-20 23:53:55 s 1 +121435.34 6 +324558.14 8350.0 C57
2021-12-21 00:03:55 S 12 25 06.067 +04 47 50.64 V C57
2021-12-21 00:03:55 s 1 +121145.78 1 +324918.75 8950.0 C57
2021-12-21 00:53:55 S 12 25 12.173 +04 46 53.83 V C57
2021-12-21 00:53:55 s 1 +119691.71 5 +326705.36 9780.0 C57
2021-12-21 01:03:55 S 12 25 13.157 +04 46 42.67 V C57
2021-12-21 01:03:55 s 1 +119399.66 5 +327059.40 1570.0 C57
2021-12-21 01:13:54 S 12 25 14.342 +04 46 34.93 V C57
2021-12-21 01:13:54 s 1 +119107.20 7 +327412.35 1910.0 C57
2021-12-21 01:23:55 S 12 25 15.458 +04 46 24.38 V C57
2021-12-21 01:23:55 s 1 +118814.34 3 +327764.21 820.0 C57
2021-12-21 01:33:55 S 12 25 16.658 +04 46 09.95 V C57
2021-12-21 01:33:55 s 1 +118521.07 3 +328114.97 8290.0 C57
2021-12-21 01:43:55 S 12 25 17.875 +04 45 59.65 V C57
2021-12-21 01:43:55 s 1 +118227.40 1 +328464.65 4350.0 C57
2021-12-21 01:53:55 S 12 25 19.097 +04 45 50.26 V C57
2021-12-21 01:53:55 s 1 +117933.32 7 +328813.24 8980.0 C57
2021-12-21 02:03:55 S 12 25 20.489 +04 45 39.38 V C57
2021-12-21 02:03:55 s 1 +117638.85 3 +329160.74 2210.0 C57
2021-12-21 02:13:55 S 12 25 21.442 +04 45 27.07 V C57
2021-12-21 02:13:55 s 1 +117343.98 1 +329507.15 4040.0 C57
2021-12-21 02:33:55 S 12 25 23.506 +04 45 04.79 V C57
2021-12-21 02:33:55 s 1 +116753.05 1 +330196.72 3510.0 C57
2021-12-21 03:13:55 S 12 25 28.714 +04 44 21.30 V C57
2021-12-21 03:13:55 s 1 +115566.48 8 +331562.84 5920.0 C57
2021-12-21 03:23:55 S 12 25 30.211 +04 44 13.52 V C57
2021-12-21 03:23:55 s 1 +115268.87 7 +331901.67 8120.0 C57
2021-12-21 03:33:55 S 12 25 31.070 +04 43 57.83 V C57
2021-12-21 03:33:55 s 1 +114970.88 1 +332239.41 8970.0 C57
2021-12-21 03:43:55 S 12 25 32.345 +04 43 46.06 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)