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
2021-12-09 07:43:55 s 1 +25321.956 0 +387359.71 5290.0 C57
2021-12-09 07:53:55 S 11 53 46.286 +09 29 03.62 V C57
2021-12-09 07:53:55 s 1 +24974.703 0 +387421.06 3960.0 C57
2021-12-09 08:03:55 S 11 53 47.510 +09 28 58.04 V C57
2021-12-09 08:03:55 s 1 +24627.384 0 +387481.48 2700.0 C57
2021-12-09 08:13:55 S 11 53 48.199 +09 28 48.47 V C57
2021-12-09 08:13:55 s 1 +24279.999 0 +387540.95 1510.0 C57
2021-12-09 08:23:55 S 11 53 49.702 +09 28 46.16 V C57
2021-12-09 08:23:55 s 1 +23932.549 0 +387599.48 390.0 C57
2021-12-09 08:33:55 S 11 53 50.594 +09 28 33.78 V C57
2021-12-09 08:33:55 s 1 +23585.035 0 +387657.08 9330.0 C57
2021-12-09 08:53:55 S 11 53 52.639 +09 28 10.42 V C57
2021-12-09 08:53:55 s 1 +22889.819 0 +387769.45 7380.0 C57
2021-12-09 09:03:55 S 11 53 53.594 +09 28 03.11 V C57
2021-12-09 09:03:55 s 1 +22542.119 0 +387824.23 6480.0 C57
2021-12-09 09:33:55 S 11 53 57.118 +09 27 31.54 V C57
2021-12-09 09:33:55 s 1 +21498.658 0 +387982.94 4080.0 C57
2021-12-09 09:43:55 S 11 53 58.435 +09 27 24.70 V C57
2021-12-09 09:43:55 s 1 +21150.721 0 +388033.96 3360.0 C57
2021-12-09 09:53:55 S 11 53 59.400 +09 27 09.47 V C57
2021-12-09 09:53:55 s 1 +20802.727 0 +388084.05 2670.0 C57
2021-12-09 10:03:55 S 11 54 00.535 +09 27 05.11 V C57
2021-12-09 10:03:55 s 1 +20454.677 0 +388133.19 2010.0 C57
2021-12-09 10:13:55 S 11 54 01.529 +09 26 57.98 V C57
2021-12-09 10:13:55 s 1 +20106.572 0 +388181.40 1380.0 C57
2021-12-09 10:23:55 S 11 54 02.621 +09 26 45.31 V C57
2021-12-09 10:23:55 s 1 +19758.412 0 +388228.67 770.0 C57
2021-12-09 10:33:55 S 11 54 03.730 +09 26 34.01 V C57
2021-12-09 10:33:55 s 1 +19410.199 0 +388275.01 190.0 C57
2021-12-09 10:43:55 S 11 54 04.898 +09 26 25.62 V C57
2021-12-09 10:43:55 s 1 +19061.933 0 +388320.40 9620.0 C57
2021-12-09 10:53:55 S 11 54 05.743 +09 26 10.82 V C57
2021-12-09 10:53:55 s 1 +18713.616 0 +388364.86 9060.0 C57
2021-12-09 12:03:55 S 11 54 13.630 +09 25 07.25 V C57
2021-12-09 12:03:55 s 1 +16274.013 0 +388649.82 5210.0 C57
2021-12-09 12:13:55 S 11 54 14.914 +09 25 01.34 V C57
2021-12-09 12:13:55 s 1 +15925.312 0 +388686.78 4630.0 C57
2021-12-09 12:23:55 S 11 54 15.583 +09 24 54.47 V C57
2021-12-09 12:23:55 s 1 +15576.566 0 +388722.80 4020.0 C57
2021-12-09 12:33:55 S 11 54 16.860 +09 24 41.94 V C57
2021-12-09 12:33:55 s 1 +15227.778 0 +388757.89 3390.0 C57
2021-12-09 12:53:55 S 11 54 18.996 +09 24 25.63 V C57
2021-12-09 12:53:55 s 1 +14530.077 0 +388825.24 2050.0 C57
2021-12-09 13:03:55 S 11 54 20.112 +09 24 11.84 V C57
2021-12-09 13:03:55 s 1 +14181.298 0 +388857.39 700.0 C57
2021-12-09 13:13:55 S 11 54 21.254 +09 24 05.44 V C57
2021-12-09 13:13:55 s 1 +13832.336 0 +388888.74 9990.0 C57
2021-12-09 13:23:55 S 11 54 22.380 +09 23 52.01 V C57
2021-12-09 13:23:55 s 1 +13483.344 0 +388919.14 9190.0 C57
2021-12-09 13:33:55 S 11 54 23.292 +09 23 48.01 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)