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
2021-11-18 23:53:56 S 11 01 50.621 +16 12 04.61 V C57
2021-11-18 23:53:56 s 1 -131715.44 3 - 4314.703 3010.0 C57
2021-11-19 00:03:56 S 11 01 51.706 +16 11 57.12 V C57
2021-11-19 00:03:56 s 1 -131111.39 9 - 5321.293 1250.0 C57
2021-11-19 00:13:56 S 11 01 52.529 +16 11 53.88 V C57
2021-11-19 00:13:56 s 1 -130500.49 7 - 6327.610 3950.0 C57
2021-11-21 14:13:56 S 11 08 29.849 +15 26 14.71 V C57
2021-11-21 14:13:56 s 1 +175418.46 6 +116689.87 8170.0 C57
2021-11-21 14:23:56 S 11 08 30.926 +15 26 12.66 V C57
2021-11-21 14:23:56 s 1 +175504.74 4 +117518.44 5080.0 C57
2021-11-21 16:23:56 S 11 08 43.850 +15 24 40.46 V C57
2021-11-21 16:23:56 s 1 +176360.71 8 +127338.94 7160.0 C57
2021-11-21 17:03:56 S 11 08 48.794 +15 24 15.30 V C57
2021-11-21 17:03:56 s 1 +176575.06 8 +130562.25 500.0 C57
2021-11-21 17:13:56 S 11 08 49.694 +15 24 05.54 V C57
2021-11-21 17:13:56 s 1 +176623.30 7 +131364.16 9460.0 C57
2021-11-21 19:53:56 S 11 09 07.207 +15 21 58.86 V C57
2021-11-21 19:53:56 s 1 +177116.37 6 +143982.50 3860.0 C57
2021-11-21 20:03:56 S 11 09 08.052 +15 21 53.50 V C57
2021-11-21 20:03:56 s 1 +177130.39 7 +144757.92 9020.0 C57
2021-11-21 21:33:56 S 11 09 17.870 +15 20 46.50 V C57
2021-11-21 21:33:56 s 1 +177172.19 4 +151667.12 640.0 C57
2021-11-21 21:53:56 S 11 09 20.345 +15 20 34.33 V C57
2021-11-21 21:53:56 s 1 +177161.33 4 +153185.54 480.0 C57
2021-11-21 22:03:56 S 11 09 21.418 +15 20 24.90 V C57
2021-11-21 22:03:56 s 1 +177153.22 0 +153942.44 5720.0 C57
2021-11-21 22:13:56 S 11 09 22.190 +15 20 16.51 V C57
2021-11-21 22:13:56 s 1 +177143.33 1 +154697.81 4560.0 C57
2021-11-21 22:23:56 S 11 09 23.330 +15 20 10.64 V C57
2021-11-21 22:23:56 s 1 +177131.67 6 +155451.64 7020.0 C57
2021-11-21 22:33:56 S 11 09 24.691 +15 20 08.52 V C57
2021-11-21 22:33:56 s 1 +177118.26 7 +156203.94 3160.0 C57
2021-11-22 00:13:56 S 11 09 35.210 +15 18 45.83 V C57
2021-11-22 00:13:56 s 1 +176889.84 3 +163642.97 4510.0 C57
2021-11-22 00:23:56 S 11 09 36.444 +15 18 39.42 V C57
2021-11-22 00:23:56 s 1 +176857.78 0 +164378.50 3420.0 C57
2021-11-22 00:33:56 S 11 09 37.733 +15 18 34.13 V C57
2021-11-22 00:33:56 s 1 +176824.07 8 +165112.52 6440.0 C57
2021-11-22 00:53:56 S 11 09 39.698 +15 18 16.34 V C57
2021-11-22 00:53:56 s 1 +176751.79 5 +166576.02 4890.0 C57
2021-11-22 01:03:56 S 11 09 41.009 +15 18 09.14 V C57
2021-11-22 01:03:56 s 1 +176713.23 1 +167305.50 410.0 C57
2021-11-22 02:53:56 S 11 09 52.678 +15 16 41.02 V C57
2021-11-22 02:53:56 s 1 +176185.19 6 +175230.53 7490.0 C57
2021-11-22 03:03:56 S 11 09 53.558 +15 16 37.02 V C57
2021-11-22 03:03:56 s 1 +176127.97 6 +175942.00 5900.0 C57
2021-11-22 03:13:56 S 11 09 54.967 +15 16 30.36 V C57
2021-11-22 03:13:56 s 1 +176069.25 6 +176651.98 8920.0 C57
2021-11-22 03:33:56 S 11 09 57.206 +15 16 20.17 V C57
2021-11-22 03:33:56 s 1 +175947.34 8 +178067.48 8920.0 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)