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
2021-12-06 14:43:55 s 1 +145502.42 0 +288487.81 2610.0 C57
2021-12-06 14:53:55 S 11 46 36.713 +10 29 14.60 V C57
2021-12-06 14:53:55 s 1 +145266.08 3 +288947.07 1900.0 C57
2021-12-06 16:13:55 S 11 46 45.646 +10 27 57.31 V C57
2021-12-06 16:13:55 s 1 +143354.08 2 +292579.14 9000.0 C57
2021-12-06 16:23:55 S 11 46 46.421 +10 27 50.36 V C57
2021-12-06 16:23:55 s 1 +143112.45 6 +293027.92 9130.0 C57
2021-12-06 16:33:55 S 11 46 48.012 +10 27 36.43 V C57
2021-12-06 16:33:55 s 1 +142870.25 4 +293475.54 7180.0 C57
2021-12-06 16:43:55 S 11 46 48.984 +10 27 31.86 V C57
2021-12-06 16:43:55 s 1 +142627.47 9 +293922.00 3160.0 C57
2021-12-06 16:53:55 S 11 46 50.191 +10 27 22.57 V C57
2021-12-06 16:53:55 s 1 +142384.13 4 +294367.31 7080.0 C57
2021-12-06 17:03:55 S 11 46 51.022 +10 27 09.76 V C57
2021-12-06 17:03:55 s 1 +142140.22 0 +294811.46 8940.0 C57
2021-12-06 17:13:55 S 11 46 52.320 +10 27 06.30 V C57
2021-12-06 17:13:55 s 1 +141895.74 0 +295254.45 8760.0 C57
2021-12-06 17:23:55 S 11 46 53.398 +10 26 52.58 V C57
2021-12-06 17:23:55 s 1 +141650.69 6 +295696.30 6540.0 C57
2021-12-06 17:33:55 S 11 46 54.506 +10 26 44.88 V C57
2021-12-06 17:33:55 s 1 +141405.09 1 +296136.99 2300.0 C57
2021-12-06 18:53:55 S 11 47 03.379 +10 25 32.56 V C57
2021-12-06 18:53:55 s 1 +139420.32 3 +299621.21 6480.0 C57
2021-12-06 19:03:55 S 11 47 04.157 +10 25 29.06 V C57
2021-12-06 19:03:55 s 1 +139169.77 0 +300051.59 4400.0 C57
2021-12-06 19:13:55 S 11 47 05.518 +10 25 13.01 V C57
2021-12-06 19:13:55 s 1 +138918.67 9 +300480.83 380.0 C57
2021-12-06 19:23:55 S 11 47 06.631 +10 25 06.17 V C57
2021-12-06 19:23:55 s 1 +138667.05 1 +300908.93 4430.0 C57
2021-12-06 19:33:55 S 11 47 07.877 +10 24 59.54 V C57
2021-12-06 19:33:55 s 1 +138414.89 0 +301335.89 6570.0 C57
2021-12-06 19:43:55 S 11 47 08.842 +10 24 51.59 V C57
2021-12-06 19:43:55 s 1 +138162.19 6 +301761.71 6790.0 C57
2021-12-06 19:53:55 S 11 47 09.996 +10 24 43.78 V C57
2021-12-06 19:53:55 s 1 +137908.97 3 +302186.40 5100.0 C57
2021-12-06 20:03:55 S 11 47 11.378 +10 24 30.38 V C57
2021-12-06 20:03:55 s 1 +137655.22 3 +302609.95 1530.0 C57
2021-12-06 20:13:55 S 11 47 12.324 +10 24 23.76 V C57
2021-12-06 20:13:55 s 1 +137400.94 7 +303032.37 6060.0 C57
2021-12-06 20:23:55 S 11 47 13.366 +10 24 17.32 V C57
2021-12-06 20:23:55 s 1 +137146.14 8 +303453.66 8720.0 C57
2021-12-06 20:33:55 S 11 47 14.794 +10 23 59.82 V C57
2021-12-06 20:33:55 s 1 +136890.82 8 +303873.81 9500.0 C57
2021-12-06 21:33:55 S 11 47 21.046 +10 23 09.46 V C57
2021-12-06 21:33:55 s 1 +135348.08 9 +306371.03 5410.0 C57
2021-12-06 21:43:55 S 11 47 22.133 +10 22 59.38 V C57
2021-12-06 21:43:55 s 1 +135089.18 3 +306783.30 3330.0 C57
2021-12-06 21:53:55 S 11 47 23.215 +10 22 52.50 V C57
2021-12-06 21:53:55 s 1 +134829.77 2 +307194.43 9450.0 C57
2021-12-06 22:13:55 S 11 47 25.445 +10 22 32.09 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)