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
2021-11-29 07:23:55 s 1 -128462.90 8 +294110.19 2390.0 C57
2021-11-29 07:33:55 S 11 27 56.911 +12 59 20.80 V C57
2021-11-29 07:33:55 s 1 -128727.91 3 +293670.44 4690.0 C57
2021-11-29 08:03:55 S 11 27 59.887 +12 58 56.78 V C57
2021-11-29 08:03:55 s 1 -129519.64 6 +292343.83 7390.0 C57
2021-11-29 09:33:55 S 11 28 09.511 +12 57 41.69 V C57
2021-11-29 09:33:55 s 1 -131864.71 8 +288297.51 5350.0 C57
2021-11-29 09:43:55 S 11 28 10.176 +12 57 30.24 V C57
2021-11-29 09:43:55 s 1 -132122.43 6 +287841.73 6190.0 C57
2021-11-29 09:53:55 S 11 28 11.354 +12 57 24.95 V C57
2021-11-29 09:53:55 s 1 -132379.57 6 +287384.71 4520.0 C57
2021-11-29 10:03:55 S 11 28 12.245 +12 57 13.39 V C57
2021-11-29 10:03:55 s 1 -132636.13 6 +286926.45 360.0 C57
2021-11-29 10:13:55 S 11 28 13.154 +12 57 07.45 V C57
2021-11-29 10:13:55 s 1 -132892.11 1 +286466.95 3680.0 C57
2021-11-29 10:23:55 S 11 28 14.263 +12 56 57.19 V C57
2021-11-29 10:23:55 s 1 -133147.50 0 +286006.20 4470.0 C57
2021-11-29 10:43:55 S 11 28 16.627 +12 56 46.00 V C57
2021-11-29 10:43:55 s 1 -133656.50 8 +285080.95 8430.0 C57
2021-11-29 12:13:55 S 11 28 25.618 +12 55 30.04 V C57
2021-11-29 12:13:55 s 1 -135917.30 6 +280855.33 3320.0 C57
2021-11-29 12:43:55 S 11 28 28.169 +12 55 00.48 V C57
2021-11-29 12:43:55 s 1 -136659.85 9 +279424.12 4150.0 C57
2021-11-29 15:23:55 S 11 28 44.774 +12 52 47.32 V C57
2021-11-29 15:23:55 s 1 -140522.88 0 +271600.24 4930.0 C57
2021-11-29 15:33:55 S 11 28 45.614 +12 52 42.35 V C57
2021-11-29 15:33:55 s 1 -140758.70 1 +271100.19 1770.0 C57
2021-11-29 15:53:55 S 11 28 47.328 +12 52 21.00 V C57
2021-11-29 15:53:55 s 1 -141228.30 5 +270096.20 6710.0 C57
2021-11-29 16:03:55 S 11 28 48.547 +12 52 19.45 V C57
2021-11-29 16:03:55 s 1 -141462.08 0 +269592.27 4800.0 C57
2021-11-29 16:13:55 S 11 28 49.699 +12 52 08.36 V C57
2021-11-29 16:13:55 s 1 -141695.16 8 +269087.04 9950.0 C57
2021-11-29 17:13:55 S 11 28 55.589 +12 51 14.54 V C57
2021-11-29 17:13:55 s 1 -143079.06 0 +266028.36 8340.0 C57
2021-11-29 17:53:55 S 11 28 59.940 +12 50 45.35 V C57
2021-11-29 17:53:55 s 1 -143987.48 0 +263963.14 6780.0 C57
2021-11-29 18:03:55 S 11 29 00.974 +12 50 34.66 V C57
2021-11-29 18:03:55 s 1 -144212.78 2 +263443.55 8710.0 C57
2021-11-29 18:13:55 S 11 29 01.764 +12 50 27.46 V C57
2021-11-29 18:13:55 s 1 -144437.35 7 +262922.65 7530.0 C57
2021-11-29 18:33:55 S 11 29 03.790 +12 50 05.60 V C57
2021-11-29 18:33:55 s 1 -144884.31 0 +261876.90 5820.0 C57
2021-11-29 18:43:55 S 11 29 04.829 +12 49 57.97 V C57
2021-11-29 18:43:55 s 1 -145106.68 2 +261352.05 5250.0 C57
2021-11-29 19:43:55 S 11 29 10.776 +12 49 13.73 V C57
2021-11-29 19:43:55 s 1 -146425.21 7 +258175.13 5070.0 C57
2021-11-29 20:13:55 S 11 29 13.824 +12 48 44.39 V C57
2021-11-29 20:13:55 s 1 -147074.23 7 +256568.73 6380.0 C57
2021-11-29 20:33:55 S 11 29 16.015 +12 48 29.81 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)