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
2021-12-24 21:43:54 S 12 36 15.998 +03 01 18.59 V C57
2021-12-24 21:43:54 s 1 -70626.354 0 +368392.20 3730.0 C57
2021-12-24 21:53:54 S 12 36 17.539 +03 01 09.16 V C57
2021-12-24 21:53:54 s 1 -70965.300 0 +368196.31 9410.0 C57
2021-12-24 23:13:54 S 12 36 26.782 +02 59 32.28 V C57
2021-12-24 23:13:54 s 1 -73669.899 0 +366593.65 5940.0 C57
2021-12-24 23:33:54 S 12 36 29.189 +02 59 05.78 V C57
2021-12-24 23:33:54 s 1 -74344.073 0 +366183.11 6580.0 C57
2021-12-24 23:43:54 S 12 36 30.355 +02 58 56.42 V C57
2021-12-24 23:43:54 s 1 -74680.857 0 +365976.35 220.0 C57
2021-12-24 23:53:54 S 12 36 31.577 +02 58 45.05 V C57
2021-12-24 23:53:54 s 1 -75017.438 0 +365768.60 2740.0 C57
2021-12-25 00:03:54 S 12 36 32.707 +02 58 30.54 V C57
2021-12-25 00:03:54 s 1 -75353.815 0 +365559.87 4130.0 C57
2021-12-25 00:13:54 S 12 36 33.934 +02 58 23.70 V C57
2021-12-25 00:13:54 s 1 -75689.986 0 +365350.14 4380.0 C57
2021-12-25 00:23:54 S 12 36 35.225 +02 58 10.81 V C57
2021-12-25 00:23:54 s 1 -76025.951 0 +365139.42 3500.0 C57
2021-12-25 01:13:54 S 12 36 41.501 +02 57 07.74 V C57
2021-12-25 01:13:54 s 1 -77702.637 0 +364070.94 1820.0 C57
2021-12-25 01:33:54 S 12 36 43.457 +02 56 45.42 V C57
2021-12-25 01:33:54 s 1 -78371.826 0 +363636.60 5000.0 C57
2021-12-25 01:43:54 S 12 36 44.705 +02 56 33.65 V C57
2021-12-25 01:43:54 s 1 -78706.097 0 +363417.94 4820.0 C57
2021-12-25 01:53:54 S 12 36 45.727 +02 56 24.83 V C57
2021-12-25 01:53:54 s 1 -79040.152 0 +363198.28 3460.0 C57
2021-12-25 02:03:54 S 12 36 46.978 +02 56 11.33 V C57
2021-12-25 02:03:54 s 1 -79373.988 0 +362977.63 910.0 C57
2021-12-25 02:13:54 S 12 36 48.233 +02 55 59.16 V C57
2021-12-25 02:13:54 s 1 -79707.606 0 +362755.98 7170.0 C57
2021-12-25 02:23:54 S 12 36 49.361 +02 55 47.60 V C57
2021-12-25 02:23:54 s 1 -80041.003 0 +362533.34 2230.0 C57
2021-12-25 02:33:54 S 12 36 50.518 +02 55 39.18 V C57
2021-12-25 02:33:54 s 1 -80374.179 0 +362309.70 6080.0 C57
2021-12-25 02:53:54 S 12 36 52.898 +02 55 11.89 V C57
2021-12-25 02:53:54 s 1 -81039.862 0 +361859.43 150.0 C57
2021-12-25 03:03:54 S 12 36 54.154 +02 54 59.76 V C57
2021-12-25 03:03:54 s 1 -81372.367 0 +361632.80 360.0 C57
2021-12-25 03:13:54 S 12 36 54.996 +02 54 53.03 V C57
2021-12-25 03:13:54 s 1 -81704.646 0 +361405.17 9350.0 C57
2021-12-25 04:03:54 S 12 37 01.349 +02 53 45.31 V C57
2021-12-25 04:03:54 s 1 -83362.607 0 +360252.04 5720.0 C57
2021-12-25 04:13:54 S 12 37 02.282 +02 53 40.49 V C57
2021-12-25 04:13:54 s 1 -83693.504 0 +360018.42 7240.0 C57
2021-12-25 04:23:54 S 12 37 03.679 +02 53 27.64 V C57
2021-12-25 04:23:54 s 1 -84024.168 0 +359783.79 7510.0 C57
2021-12-25 04:43:54 S 12 37 05.952 +02 53 05.60 V C57
2021-12-25 04:43:54 s 1 -84684.786 0 +359311.54 4240.0 C57
2021-12-25 05:03:54 S 12 37 08.381 +02 52 39.72 V C57
2021-12-25 05:03:54 s 1 -85344.453 0 +358835.27 5860.0 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)