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
2021-11-26 08:53:56 S 11 20 41.155 +13 57 05.36 V C57
2021-11-26 08:53:56 s 1 +10763.049 0 +381284.23 4050.0 C57
2021-11-26 09:03:56 S 11 20 41.928 +13 56 59.24 V C57
2021-11-26 09:03:56 s 1 +10407.942 0 +381294.82 4340.0 C57
2021-11-26 09:13:56 S 11 20 43.034 +13 56 53.27 V C57
2021-11-26 09:13:56 s 1 +10052.813 0 +381304.41 4560.0 C57
2021-11-26 09:23:56 S 11 20 44.268 +13 56 46.39 V C57
2021-11-26 09:33:56 S 11 20 45.288 +13 56 37.28 V C57
2021-11-26 09:43:56 S 11 20 46.181 +13 56 24.83 V C57
2021-11-26 11:13:56 S 11 20 55.565 +13 55 16.00 V C57
2021-11-26 12:03:56 S 11 21 00.557 +13 54 37.51 V C57
2021-11-26 12:13:56 S 11 21 01.565 +13 54 25.45 V C57
2021-11-26 13:43:56 S 11 21 11.052 +13 53 14.60 V C57
2021-11-26 14:03:56 S 11 21 13.246 +13 52 57.36 V C57
2021-11-26 14:13:56 S 11 21 14.124 +13 52 46.85 V C57
2021-11-26 14:23:56 S 11 21 15.233 +13 52 45.62 V C57
2021-11-26 17:13:56 S 11 21 32.722 +13 50 31.74 V C57
2021-11-26 19:03:56 S 11 21 44.599 +13 48 55.22 V C57
2021-11-26 19:03:56 s 1 -10903.600 0 +380118.36 1550.0 C57
2021-11-26 19:33:56 S 11 21 47.453 +13 48 30.78 V C57
2021-11-26 19:33:56 s 1 -11967.728 0 +379965.47 8030.0 C57
2021-11-26 20:13:56 S 11 21 51.454 +13 47 55.97 V C57
2021-11-26 20:13:56 s 1 -13386.041 0 +379747.68 9050.0 C57
2021-11-26 21:33:56 S 11 22 00.055 +13 47 00.17 V C57
2021-11-26 21:33:56 s 1 -16220.642 0 +379264.25 5460.0 C57
2021-11-26 21:43:56 S 11 22 00.974 +13 46 45.73 V C57
2021-11-26 21:43:56 s 1 -16574.758 0 +379199.33 9720.0 C57
2021-11-26 21:53:56 S 11 22 01.925 +13 46 38.53 V C57
2021-11-26 21:53:56 s 1 -16928.825 0 +379133.41 3630.0 C57
2021-11-26 22:03:56 S 11 22 03.058 +13 46 30.25 V C57
2021-11-26 22:03:56 s 1 -17282.842 0 +379066.49 7180.0 C57
2021-11-26 22:13:56 S 11 22 03.898 +13 46 22.94 V C57
2021-11-26 22:13:56 s 1 -17636.806 0 +378998.58 370.0 C57
2021-11-26 22:23:55 S 11 22 05.347 +13 46 17.69 V C57
2021-11-26 22:23:55 s 1 -17990.719 0 +378929.67 3190.0 C57
2021-11-26 22:43:56 S 11 22 07.114 +13 45 57.74 V C57
2021-11-26 22:43:56 s 1 -18698.383 0 +378788.84 7720.0 C57
2021-11-27 00:03:56 S 11 22 15.329 +13 44 51.90 V C57
2021-11-27 00:03:56 s 1 -21526.747 0 +378185.56 450.0 C57
2021-11-27 00:13:56 S 11 22 16.567 +13 44 49.27 V C57
2021-11-27 00:13:56 s 1 -21880.019 0 +378105.65 9000.0 C57
2021-11-27 00:23:56 S 11 22 17.402 +13 44 34.51 V C57
2021-11-27 00:23:56 s 1 -22233.227 0 +378024.73 7130.0 C57
2021-11-27 00:43:56 S 11 22 19.666 +13 44 21.08 V C57
2021-11-27 00:43:56 s 1 -22939.446 0 +377859.90 2150.0 C57
2021-11-27 00:53:56 S 11 22 20.609 +13 44 15.18 V C57
2021-11-27 00:53:56 s 1 -23292.456 0 +377775.98 9020.0 C57
2021-11-27 02:53:55 S 11 22 32.981 +13 42 37.12 V C57
2021-11-27 02:53:55 s 1 -27522.989 0 +376690.74 7090.0 C57
2021-11-27 03:03:56 S 11 22 34.226 +13 42 24.62 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)