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
2021-12-08 23:43:55 s 1 +41894.671 0 +383307.06 3630.0 C57
2021-12-08 23:53:55 S 11 52 53.774 +09 36 33.37 V C57
2021-12-08 23:53:55 s 1 +41551.647 0 +383413.69 2740.0 C57
2021-12-09 00:03:55 S 11 52 54.782 +09 36 27.43 V C57
2021-12-09 00:03:55 s 1 +41208.514 0 +383519.37 1610.0 C57
2021-12-09 00:13:55 S 11 52 55.956 +09 36 23.15 V C57
2021-12-09 00:13:55 s 1 +40865.272 0 +383624.11 230.0 C57
2021-12-09 00:23:55 S 11 52 57.036 +09 36 10.44 V C57
2021-12-09 00:23:55 s 1 +40521.923 0 +383727.89 8610.0 C57
2021-12-09 00:33:55 S 11 52 57.907 +09 36 01.04 V C57
2021-12-09 00:33:55 s 1 +40178.468 0 +383830.73 6750.0 C57
2021-12-09 00:43:55 S 11 52 59.345 +09 35 50.60 V C57
2021-12-09 00:43:55 s 1 +39834.907 0 +383932.63 4660.0 C57
2021-12-09 01:43:55 S 11 53 05.734 +09 34 57.72 V C57
2021-12-09 01:43:55 s 1 +37771.378 0 +384524.12 7430.0 C57
2021-12-09 01:53:55 S 11 53 06.886 +09 34 46.85 V C57
2021-12-09 01:53:55 s 1 +37427.105 0 +384619.39 3810.0 C57
2021-12-09 02:03:55 S 11 53 08.081 +09 34 37.52 V C57
2021-12-09 02:03:55 s 1 +37082.732 0 +384713.72 9980.0 C57
2021-12-09 02:13:55 S 11 53 08.892 +09 34 28.13 V C57
2021-12-09 02:13:55 s 1 +36738.263 0 +384807.10 5960.0 C57
2021-12-09 02:23:55 S 11 53 10.214 +09 34 16.86 V C57
2021-12-09 02:23:55 s 1 +36393.697 0 +384899.53 1740.0 C57
2021-12-09 02:33:55 S 11 53 11.275 +09 34 05.99 V C57
2021-12-09 02:33:55 s 1 +36049.035 0 +384991.03 7320.0 C57
2021-12-09 02:53:55 S 11 53 13.462 +09 33 45.32 V C57
2021-12-09 02:53:55 s 1 +35359.429 0 +385171.18 7930.0 C57
2021-12-09 03:03:55 S 11 53 14.618 +09 33 38.27 V C57
2021-12-09 03:03:55 s 1 +35014.486 0 +385259.84 2960.0 C57
2021-12-09 04:23:55 S 11 53 23.299 +09 32 21.95 V C57
2021-12-09 04:23:55 s 1 +32251.704 0 +385935.15 7090.0 C57
2021-12-09 04:33:55 S 11 53 24.545 +09 32 15.07 V C57
2021-12-09 04:33:55 s 1 +31905.965 0 +386015.32 650.0 C57
2021-12-09 04:43:55 S 11 53 25.519 +09 32 08.88 V C57
2021-12-09 04:43:55 s 1 +31560.142 0 +386094.55 4060.0 C57
2021-12-09 04:53:55 S 11 53 26.335 +09 31 56.10 V C57
2021-12-09 04:53:55 s 1 +31214.235 0 +386172.84 7330.0 C57
2021-12-09 05:03:55 S 11 53 27.821 +09 31 46.45 V C57
2021-12-09 05:03:55 s 1 +30868.247 0 +386250.19 460.0 C57
2021-12-09 05:13:55 S 11 53 28.824 +09 31 37.60 V C57
2021-12-09 05:13:55 s 1 +30522.177 0 +386326.59 3460.0 C57
2021-12-09 05:23:55 S 11 53 29.892 +09 31 24.89 V C57
2021-12-09 05:23:55 s 1 +30176.026 0 +386402.05 6330.0 C57
2021-12-09 07:13:55 S 11 53 41.736 +09 29 47.69 V C57
2021-12-09 07:13:55 s 1 +26363.308 0 +387170.01 9770.0 C57
2021-12-09 07:23:55 S 11 53 43.037 +09 29 36.89 V C57
2021-12-09 07:23:55 s 1 +26016.259 0 +387234.19 8190.0 C57
2021-12-09 07:33:55 S 11 53 44.026 +09 29 25.69 V C57
2021-12-09 07:33:55 s 1 +25669.142 0 +387297.42 6700.0 C57
2021-12-09 07:43:55 S 11 53 45.118 +09 29 15.29 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)