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
2021-12-10 23:33:54 s 1 -57629.679 0 +375317.42 3860.0 C57
2021-12-11 00:43:55 S 11 58 12.626 +08 50 16.98 V C57
2021-12-11 00:43:55 s 1 -59996.128 0 +374148.54 7160.0 C57
2021-12-11 00:53:54 S 11 58 13.910 +08 50 02.83 V C57
2021-12-11 00:53:54 s 1 -60333.594 0 +373977.69 4270.0 C57
2021-12-11 01:03:54 S 11 58 14.770 +08 49 55.13 V C57
2021-12-11 01:03:54 s 1 -60670.906 0 +373805.87 530.0 C57
2021-12-11 01:13:54 S 11 58 15.924 +08 49 47.03 V C57
2021-12-11 01:13:54 s 1 -61008.065 0 +373633.09 5940.0 C57
2021-12-11 01:23:54 S 11 58 16.891 +08 49 34.07 V C57
2021-12-11 01:23:54 s 1 -61345.069 0 +373459.33 490.0 C57
2021-12-11 01:33:55 S 11 58 17.894 +08 49 24.60 V C57
2021-12-11 01:33:55 s 1 -61681.918 0 +373284.61 4170.0 C57
2021-12-11 01:43:54 S 11 58 19.123 +08 49 14.52 V C57
2021-12-11 01:43:54 s 1 -62018.610 0 +373108.92 6980.0 C57
2021-12-11 01:53:55 S 11 58 19.990 +08 49 03.29 V C57
2021-12-11 01:53:55 s 1 -62355.143 0 +372932.26 8910.0 C57
2021-12-11 02:03:54 S 11 58 21.370 +08 48 54.61 V C57
2021-12-11 02:03:54 s 1 -62691.519 0 +372754.62 9970.0 C57
2021-12-11 02:13:54 S 11 58 22.574 +08 48 45.22 V C57
2021-12-11 02:13:54 s 1 -63027.734 0 +372576.02 150.0 C57
2021-12-11 03:23:55 S 11 58 29.806 +08 47 40.09 V C57
2021-12-11 03:23:55 s 1 -65376.678 0 +371298.60 6290.0 C57
2021-12-11 03:33:54 S 11 58 31.154 +08 47 26.95 V C57
2021-12-11 03:33:54 s 1 -65711.577 0 +371112.22 9240.0 C57
2021-12-11 03:43:54 S 11 58 32.018 +08 47 16.73 V C57
2021-12-11 03:43:54 s 1 -66046.307 0 +370924.86 1270.0 C57
2021-12-11 03:53:54 S 11 58 33.365 +08 47 09.74 V C57
2021-12-11 03:53:54 s 1 -66380.867 0 +370736.53 2380.0 C57
2021-12-11 04:03:54 S 11 58 34.147 +08 46 59.12 V C57
2021-12-11 04:03:54 s 1 -66715.255 0 +370547.23 2550.0 C57
2021-12-11 04:13:54 S 11 58 35.465 +08 46 48.83 V C57
2021-12-11 04:13:54 s 1 -67049.472 0 +370356.95 1780.0 C57
2021-12-11 04:23:54 S 11 58 36.557 +08 46 45.37 V C57
2021-12-11 04:23:54 s 1 -67383.514 0 +370165.70 80.0 C57
2021-12-11 04:33:55 S 11 58 37.694 +08 46 28.60 V C57
2021-12-11 04:33:55 s 1 -67717.383 0 +369973.47 7430.0 C57
2021-12-11 04:43:54 S 11 58 38.328 +08 46 23.30 V C57
2021-12-11 04:43:54 s 1 -68051.076 0 +369780.26 3830.0 C57
2021-12-11 04:53:55 S 11 58 39.984 +08 46 11.50 V C57
2021-12-11 04:53:55 s 1 -68384.592 0 +369586.08 9270.0 C57
2021-12-11 06:13:54 S 11 58 48.151 +08 44 53.66 V C57
2021-12-11 06:13:54 s 1 -71046.240 0 +367997.41 7920.0 C57
2021-12-11 06:23:55 S 11 58 49.430 +08 44 42.14 V C57
2021-12-11 06:23:55 s 1 -71378.120 0 +367794.42 4570.0 C57
2021-12-11 06:33:54 S 11 58 50.587 +08 44 37.03 V C57
2021-12-11 06:33:54 s 1 -71709.812 0 +367590.44 220.0 C57
2021-12-11 06:43:54 S 11 58 51.706 +08 44 26.59 V C57
2021-12-11 06:43:54 s 1 -72041.316 0 +367385.49 4860.0 C57
2021-12-11 06:53:54 S 11 58 52.690 +08 44 10.39 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)