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
2021-12-01 14:33:55 s 1 -160580.58 8 +72016.162 6300.0 C57
2021-12-01 15:03:55 S 11 33 30.355 +12 12 47.27 V C57
2021-12-01 15:03:55 s 1 -159921.26 8 +69215.923 3640.0 C57
2021-12-01 16:13:55 S 11 33 37.224 +12 11 46.10 V C57
2021-12-01 16:13:55 s 1 -158256.06 2 +62627.908 2240.0 C57
2021-12-01 16:23:55 S 11 33 38.198 +12 11 35.02 V C57
2021-12-01 16:23:55 s 1 -158003.25 4 +61680.681 4720.0 C57
2021-12-01 16:33:55 S 11 33 39.456 +12 11 27.35 V C57
2021-12-01 16:33:55 s 1 -157746.62 6 +60731.958 1800.0 C57
2021-12-01 16:43:55 S 11 33 40.270 +12 11 20.26 V C57
2021-12-01 16:43:55 s 1 -157486.14 6 +59781.747 3360.0 C57
2021-12-01 17:03:55 S 11 33 42.302 +12 11 03.88 V C57
2021-12-01 17:03:55 s 1 -156953.50 2 +57876.896 9430.0 C57
2021-12-01 17:13:55 S 11 33 43.099 +12 10 59.16 V C57
2021-12-01 17:13:55 s 1 -156681.27 6 +56922.274 3690.0 C57
2021-12-01 17:23:55 S 11 33 44.150 +12 10 44.33 V C57
2021-12-01 17:23:55 s 1 -156405.07 0 +55966.200 1930.0 C57
2021-12-01 17:33:55 S 11 33 45.139 +12 10 40.40 V C57
2021-12-01 17:33:55 s 1 -156124.85 1 +55008.686 4030.0 C57
2021-12-01 18:43:55 S 11 33 51.874 +12 09 41.76 V C57
2021-12-01 18:43:55 s 1 -154048.14 5 +48266.636 5690.0 C57
2021-12-01 19:03:55 S 11 33 53.933 +12 09 23.58 V C57
2021-12-01 19:03:55 s 1 -153416.74 1 +46328.009 4720.0 C57
2021-12-01 19:13:55 S 11 33 55.073 +12 09 13.18 V C57
2021-12-01 19:13:55 s 1 -153094.51 7 +45356.704 8080.0 C57
2021-12-01 19:23:55 S 11 33 56.074 +12 09 07.16 V C57
2021-12-01 19:23:55 s 1 -152767.89 7 +44384.091 3790.0 C57
2021-12-01 19:33:55 S 11 33 57.156 +12 08 55.90 V C57
2021-12-01 19:33:55 s 1 -152436.84 4 +43410.183 1730.0 C57
2021-12-01 19:43:55 S 11 33 58.025 +12 08 49.31 V C57
2021-12-01 19:43:55 s 1 -152101.31 9 +42434.996 1740.0 C57
2021-12-01 19:53:55 S 11 33 59.057 +12 08 38.87 V C57
2021-12-01 19:53:55 s 1 -151761.28 5 +41458.545 3680.0 C57
2021-12-01 20:03:55 S 11 34 00.103 +12 08 30.80 V C57
2021-12-01 20:03:55 s 1 -151416.70 3 +40480.844 7410.0 C57
2021-12-01 20:13:55 S 11 34 00.857 +12 08 23.50 V C57
2021-12-01 20:13:55 s 1 -151067.53 5 +39501.911 2760.0 C57
2021-12-01 21:13:55 S 11 34 06.446 +12 07 30.00 V C57
2021-12-01 21:13:55 s 1 -148873.99 5 +33603.392 560.0 C57
2021-12-01 21:33:55 S 11 34 08.837 +12 07 21.14 V C57
2021-12-01 21:33:55 s 1 -148104.30 2 +31628.168 5850.0 C57
2021-12-01 21:43:55 S 11 34 09.727 +12 07 05.41 V C57
2021-12-01 21:43:55 s 1 -147712.04 6 +30638.948 8890.0 C57
2021-12-01 21:53:55 S 11 34 10.721 +12 07 03.04 V C57
2021-12-01 21:53:55 s 1 -147314.79 3 +29648.685 1990.0 C57
2021-12-01 22:03:55 S 11 34 11.897 +12 06 50.22 V C57
2021-12-01 22:03:55 s 1 -146912.50 0 +28657.401 4960.0 C57
2021-12-01 22:13:55 S 11 34 12.415 +12 06 41.69 V C57
2021-12-01 22:13:55 s 1 -146505.12 4 +27665.117 7660.0 C57
2021-12-01 22:23:55 S 11 34 13.822 +12 06 35.50 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)