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 17:13:55 s 1 -44668.218 0 +380840.42 4060.0 C57
2021-12-10 17:23:54 S 11 57 24.984 +08 57 17.60 V C57
2021-12-10 17:23:54 s 1 -45011.535 0 +380712.79 5140.0 C57
2021-12-10 17:33:55 S 11 57 25.992 +08 57 05.72 V C57
2021-12-10 17:33:55 s 1 -45354.743 0 +380584.20 5560.0 C57
2021-12-10 17:43:54 S 11 57 27.336 +08 56 56.94 V C57
2021-12-10 17:43:54 s 1 -45697.841 0 +380454.66 5310.0 C57
2021-12-10 17:53:54 S 11 57 28.174 +08 56 47.26 V C57
2021-12-10 17:53:54 s 1 -46040.828 0 +380324.17 4390.0 C57
2021-12-10 18:03:55 S 11 57 29.033 +08 56 36.35 V C57
2021-12-10 18:03:55 s 1 -46383.704 0 +380192.72 2800.0 C57
2021-12-10 18:13:54 S 11 57 30.478 +08 56 24.29 V C57
2021-12-10 18:13:54 s 1 -46726.467 0 +380060.31 520.0 C57
2021-12-10 18:23:55 S 11 57 31.258 +08 56 18.96 V C57
2021-12-10 18:23:55 s 1 -47069.117 0 +379926.95 7560.0 C57
2021-12-10 19:33:55 S 11 57 38.842 +08 55 10.63 V C57
2021-12-10 19:33:55 s 1 -49464.402 0 +378966.66 7320.0 C57
2021-12-10 19:43:54 S 11 57 40.078 +08 55 01.81 V C57
2021-12-10 19:43:54 s 1 -49806.109 0 +378825.65 8730.0 C57
2021-12-10 19:53:55 S 11 57 41.194 +08 54 53.64 V C57
2021-12-10 19:53:55 s 1 -50147.693 0 +378683.68 9430.0 C57
2021-12-10 20:03:54 S 11 57 42.290 +08 54 41.18 V C57
2021-12-10 20:03:54 s 1 -50489.154 0 +378540.76 9400.0 C57
2021-12-10 20:13:55 S 11 57 43.438 +08 54 34.27 V C57
2021-12-10 20:13:55 s 1 -50830.491 0 +378396.87 8640.0 C57
2021-12-10 20:23:54 S 11 57 44.599 +08 54 23.18 V C57
2021-12-10 20:23:54 s 1 -51171.704 0 +378252.02 7140.0 C57
2021-12-10 20:33:54 S 11 57 45.629 +08 54 12.74 V C57
2021-12-10 20:33:54 s 1 -51512.790 0 +378106.22 4910.0 C57
2021-12-10 20:43:54 S 11 57 46.670 +08 54 03.64 V C57
2021-12-10 20:43:54 s 1 -51853.749 0 +377959.46 1940.0 C57
2021-12-10 21:03:55 S 11 57 48.730 +08 53 45.20 V C57
2021-12-10 21:03:55 s 1 -52535.282 0 +377663.05 3750.0 C57
2021-12-10 22:13:54 S 11 57 56.606 +08 52 38.68 V C57
2021-12-10 22:13:54 s 1 -54916.506 0 +376595.37 1120.0 C57
2021-12-10 22:23:54 S 11 57 57.538 +08 52 26.90 V C57
2021-12-10 22:23:54 s 1 -55256.141 0 +376439.00 500.0 C57
2021-12-10 22:33:55 S 11 57 58.594 +08 52 16.68 V C57
2021-12-10 22:33:55 s 1 -55595.639 0 +376281.66 9090.0 C57
2021-12-10 22:43:54 S 11 57 59.734 +08 52 09.01 V C57
2021-12-10 22:43:54 s 1 -55934.998 0 +376123.37 6890.0 C57
2021-12-10 22:53:55 S 11 58 00.794 +08 51 59.54 V C57
2021-12-10 22:53:55 s 1 -56274.218 0 +375964.10 3890.0 C57
2021-12-10 23:03:54 S 11 58 01.915 +08 51 47.48 V C57
2021-12-10 23:03:54 s 1 -56613.297 0 +375803.88 90.0 C57
2021-12-10 23:13:55 S 11 58 02.993 +08 51 41.58 V C57
2021-12-10 23:13:55 s 1 -56952.234 0 +375642.69 5490.0 C57
2021-12-10 23:23:54 S 11 58 03.847 +08 51 31.64 V C57
2021-12-10 23:23:54 s 1 -57291.028 0 +375480.53 80.0 C57
2021-12-10 23:33:54 S 11 58 04.963 +08 51 21.78 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)