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
2021-12-05 20:23:55 s 1 +167195.68 6 +230531.60 1050.0 C57
2021-12-05 20:33:55 S 11 44 34.049 +10 45 43.20 V C57
2021-12-05 20:33:55 s 1 +167043.71 8 +231127.72 550.0 C57
2021-12-05 20:43:55 S 11 44 35.016 +10 45 35.53 V C57
2021-12-05 20:43:55 s 1 +166890.78 0 +231722.52 6450.0 C57
2021-12-05 21:03:55 S 11 44 37.601 +10 45 10.37 V C57
2021-12-05 21:03:55 s 1 +166582.01 4 +232908.15 7510.0 C57
2021-12-05 21:53:55 S 11 44 42.960 +10 44 29.33 V C57
2021-12-05 21:53:55 s 1 +165793.44 2 +235849.11 8330.0 C57
2021-12-05 22:23:55 S 11 44 46.306 +10 44 05.03 V C57
2021-12-05 22:23:55 s 1 +165309.05 3 +237597.93 1100.0 C57
2021-12-05 22:33:55 S 11 44 47.338 +10 43 54.55 V C57
2021-12-05 22:33:55 s 1 +165145.74 2 +238178.24 8500.0 C57
2021-12-05 22:43:55 S 11 44 48.420 +10 43 46.45 V C57
2021-12-05 22:43:55 s 1 +164981.51 4 +238757.26 2500.0 C57
2021-12-05 22:53:55 S 11 44 49.692 +10 43 37.49 V C57
2021-12-05 22:53:55 s 1 +164816.37 3 +239334.96 3130.0 C57
2021-12-05 23:03:55 S 11 44 50.633 +10 43 25.86 V C57
2021-12-05 23:03:55 s 1 +164650.32 3 +239911.37 380.0 C57
2021-12-05 23:13:55 S 11 44 51.898 +10 43 21.54 V C57
2021-12-05 23:13:55 s 1 +164483.36 9 +240486.47 4280.0 C57
2021-12-05 23:23:55 S 11 44 53.138 +10 43 14.16 V C57
2021-12-05 23:23:55 s 1 +164315.51 5 +241060.27 4850.0 C57
2021-12-05 23:33:55 S 11 44 54.312 +10 43 03.94 V C57
2021-12-05 23:33:55 s 1 +164146.76 4 +241632.77 2100.0 C57
2021-12-06 01:23:55 S 11 45 06.420 +10 41 21.73 V C57
2021-12-06 01:23:55 s 1 +162232.51 2 +247845.04 7260.0 C57
2021-12-06 01:33:55 S 11 45 07.579 +10 41 13.06 V C57
2021-12-06 01:33:55 s 1 +162053.32 0 +248402.09 5890.0 C57
2021-12-06 01:53:55 S 11 45 09.715 +10 40 53.69 V C57
2021-12-06 01:53:55 s 1 +161692.40 4 +249512.34 3810.0 C57
2021-12-06 03:23:55 S 11 45 19.903 +10 39 32.00 V C57
2021-12-06 03:23:55 s 1 +160027.27 1 +254445.51 8070.0 C57
2021-12-06 03:33:55 S 11 45 20.815 +10 39 29.63 V C57
2021-12-06 03:33:55 s 1 +159838.18 6 +254987.31 210.0 C57
2021-12-06 03:43:55 S 11 45 21.938 +10 39 15.59 V C57
2021-12-06 03:43:55 s 1 +159648.30 2 +255527.85 9390.0 C57
2021-12-06 03:53:55 S 11 45 23.287 +10 39 04.82 V C57
2021-12-06 03:53:55 s 1 +159457.62 0 +256067.13 5640.0 C57
2021-12-06 04:03:55 S 11 45 24.281 +10 38 58.99 V C57
2021-12-06 04:03:55 s 1 +159266.14 4 +256605.16 8970.0 C57
2021-12-06 04:13:55 S 11 45 25.385 +10 38 49.63 V C57
2021-12-06 04:13:55 s 1 +159073.87 9 +257141.93 9380.0 C57
2021-12-06 04:23:55 S 11 45 26.474 +10 38 40.06 V C57
2021-12-06 04:23:55 s 1 +158880.82 7 +257677.44 6910.0 C57
2021-12-06 06:03:55 S 11 45 37.896 +10 37 09.34 V C57
2021-12-06 06:03:55 s 1 +156907.79 9 +262963.92 5770.0 C57
2021-12-06 06:13:55 S 11 45 38.854 +10 37 00.95 V C57
2021-12-06 06:13:55 s 1 +156706.31 9 +263485.73 2310.0 C57
2021-12-06 06:23:55 S 11 45 39.859 +10 36 53.14 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)