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 20:33:55 s 1 -147503.05 6 +255491.13 7510.0 C57
2021-11-29 20:53:55 S 11 29 18.166 +12 48 16.09 V C57
2021-11-29 20:53:55 s 1 -147928.75 1 +254408.17 5370.0 C57
2021-11-29 21:23:55 S 11 29 20.844 +12 47 49.38 V C57
2021-11-29 21:23:55 s 1 -148561.37 2 +252773.65 7010.0 C57
2021-11-29 22:43:55 S 11 29 28.992 +12 46 38.86 V C57
2021-11-29 22:43:55 s 1 -150212.89 4 +248355.55 900.0 C57
2021-11-29 22:53:55 S 11 29 30.070 +12 46 34.43 V C57
2021-11-29 22:53:55 s 1 -150415.63 7 +247797.18 6960.0 C57
2021-11-29 23:03:55 S 11 29 31.286 +12 46 22.98 V C57
2021-11-29 23:03:55 s 1 -150617.54 6 +247237.45 9490.0 C57
2021-11-29 23:13:55 S 11 29 32.282 +12 46 14.99 V C57
2021-11-29 23:13:55 s 1 -150818.61 5 +246676.36 8460.0 C57
2021-11-29 23:23:55 S 11 29 33.108 +12 46 04.87 V C57
2021-11-29 23:23:55 s 1 -151018.84 2 +246113.90 3860.0 C57
2021-11-29 23:33:55 S 11 29 34.178 +12 46 00.16 V C57
2021-11-29 23:33:55 s 1 -151218.22 2 +245550.07 5680.0 C57
2021-11-29 23:43:55 S 11 29 35.198 +12 45 53.10 V C57
2021-11-29 23:43:55 s 1 -151416.75 0 +244984.87 3890.0 C57
2021-11-30 01:13:55 S 11 29 44.302 +12 44 38.08 V C57
2021-11-30 01:13:55 s 1 -153164.52 2 +239836.17 2890.0 C57
2021-11-30 01:23:55 S 11 29 45.022 +12 44 25.26 V C57
2021-11-30 01:23:55 s 1 -153354.30 9 +239257.18 4140.0 C57
2021-11-30 01:33:55 S 11 29 46.205 +12 44 22.99 V C57
2021-11-30 01:33:55 s 1 -153543.19 8 +238676.80 1590.0 C57
2021-11-30 01:43:55 S 11 29 47.018 +12 44 12.19 V C57
2021-11-30 01:43:55 s 1 -153731.18 6 +238095.03 5240.0 C57
2021-11-30 01:53:55 S 11 29 48.072 +12 44 03.88 V C57
2021-11-30 01:53:55 s 1 -153918.26 6 +237511.87 5060.0 C57
2021-11-30 02:03:55 S 11 29 49.018 +12 43 55.85 V C57
2021-11-30 02:03:55 s 1 -154104.43 6 +236927.31 1030.0 C57
2021-11-30 03:53:55 S 11 30 00.144 +12 42 23.26 V C57
2021-11-30 03:53:55 s 1 -156090.86 1 +230404.62 7530.0 C57
2021-11-30 04:03:55 S 11 30 01.294 +12 42 11.88 V C57
2021-11-30 04:03:55 s 1 -156265.73 8 +229803.19 5890.0 C57
2021-11-30 04:13:55 S 11 30 02.194 +12 42 06.44 V C57
2021-11-30 04:13:55 s 1 -156439.64 4 +229200.34 150.0 C57
2021-11-30 04:23:55 S 11 30 03.108 +12 41 57.98 V C57
2021-11-30 04:23:55 s 1 -156612.57 3 +228596.06 310.0 C57
2021-11-30 04:33:55 S 11 30 04.080 +12 41 48.70 V C57
2021-11-30 04:33:55 s 1 -156784.52 1 +227990.37 6330.0 C57
2021-11-30 04:43:55 S 11 30 05.136 +12 41 40.38 V C57
2021-11-30 04:43:55 s 1 -156955.48 2 +227383.25 8200.0 C57
2021-11-30 04:53:55 S 11 30 06.206 +12 41 28.54 V C57
2021-11-30 04:53:55 s 1 -157125.45 1 +226774.70 5890.0 C57
2021-11-30 05:03:55 S 11 30 07.512 +12 41 17.63 V C57
2021-11-30 05:03:55 s 1 -157294.42 4 +226164.73 9400.0 C57
2021-11-30 06:33:55 S 11 30 16.416 +12 40 02.46 V C57
2021-11-30 06:33:55 s 1 -158769.50 0 +220610.40 8860.0 C57
2021-11-30 06:53:55 S 11 30 18.058 +12 39 49.39 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)