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
2021-12-25 18:23:54 S 12 38 42.984 +02 36 56.23 V C57
2021-12-25 18:23:54 s 1 -110834.84 0 +336453.32 9940.0 C57
2021-12-25 18:33:54 S 12 38 44.270 +02 36 43.56 V C57
2021-12-25 18:33:54 s 1 -111140.90 4 +336131.81 2320.0 C57
2021-12-25 19:43:54 S 12 38 52.548 +02 35 21.52 V C57
2021-12-25 19:43:54 s 1 -113273.49 3 +333851.95 9040.0 C57
2021-12-25 19:53:54 S 12 38 53.597 +02 35 10.28 V C57
2021-12-25 19:53:54 s 1 -113576.72 2 +333522.06 7080.0 C57
2021-12-25 20:03:54 S 12 38 54.802 +02 34 56.17 V C57
2021-12-25 20:03:54 s 1 -113879.58 9 +333191.11 3290.0 C57
2021-12-25 20:23:54 S 12 38 57.216 +02 34 34.72 V C57
2021-12-25 20:23:54 s 1 -114484.23 4 +332526.07 220.0 C57
2021-12-25 20:33:54 S 12 38 58.423 +02 34 22.98 V C57
2021-12-25 20:33:54 s 1 -114786.00 9 +332191.96 920.0 C57
2021-12-25 21:13:54 S 12 39 03.317 +02 33 36.04 V C57
2021-12-25 21:13:54 s 1 -115989.41 5 +330845.01 5150.0 C57
2021-12-25 21:23:54 S 12 39 04.298 +02 33 21.82 V C57
2021-12-25 21:23:54 s 1 -116289.33 6 +330505.63 6530.0 C57
2021-12-25 21:53:54 S 12 39 07.966 +02 32 49.88 V C57
2021-12-25 21:53:54 s 1 -117186.84 0 +329481.15 9320.0 C57
2021-12-25 22:03:54 S 12 39 09.118 +02 32 38.04 V C57
2021-12-25 22:03:54 s 1 -117485.24 9 +329137.53 3110.0 C57
2021-12-25 22:23:54 S 12 39 11.386 +02 32 11.69 V C57
2021-12-25 22:23:54 s 1 -118080.92 1 +328447.13 4940.0 C57
2021-12-25 22:33:54 S 12 39 12.552 +02 32 01.93 V C57
2021-12-25 22:33:54 s 1 -118378.18 0 +328100.33 2970.0 C57
2021-12-25 22:53:54 S 12 39 15.048 +02 31 37.52 V C57
2021-12-25 22:53:54 s 1 -118971.53 7 +327403.56 3210.0 C57
2021-12-25 23:03:54 S 12 39 16.229 +02 31 24.02 V C57
2021-12-25 23:03:54 s 1 -119267.63 1 +327053.58 5400.0 C57
2021-12-25 23:13:54 S 12 39 17.309 +02 31 13.76 V C57
2021-12-25 23:13:54 s 1 -119563.33 3 +326702.53 5640.0 C57
2021-12-25 23:23:54 S 12 39 18.482 +02 31 01.85 V C57
2021-12-25 23:23:54 s 1 -119858.64 2 +326350.42 3910.0 C57
2021-12-25 23:33:54 S 12 39 19.726 +02 30 50.18 V C57
2021-12-25 23:33:54 s 1 -120153.55 6 +325997.24 210.0 C57
2021-12-25 23:53:54 S 12 39 22.049 +02 30 30.82 V C57
2021-12-25 23:53:54 s 1 -120742.19 3 +325287.68 6870.0 C57
2021-12-26 00:43:54 S 12 39 28.159 +02 29 25.40 V C57
2021-12-26 00:43:54 s 1 -122206.75 6 +323495.10 8450.0 C57
2021-12-26 01:03:54 S 12 39 30.269 +02 29 03.16 V C57
2021-12-26 01:03:54 s 1 -122789.73 4 +322770.57 6910.0 C57
2021-12-26 01:13:54 S 12 39 31.666 +02 28 45.01 V C57
2021-12-26 01:13:54 s 1 -123080.60 6 +322406.69 3080.0 C57
2021-12-26 02:03:54 S 12 39 37.361 +02 27 50.51 V C57
2021-12-26 02:03:54 s 1 -124528.72 8 +320571.21 2900.0 C57
2021-12-26 02:13:54 S 12 39 38.568 +02 27 39.92 V C57
2021-12-26 02:13:54 s 1 -124817.09 3 +320200.88 6610.0 C57
2021-12-26 02:33:54 S 12 39 40.961 +02 27 20.30 V C57
2021-12-26 02:33:54 s 1 -125392.54 8 +319457.00 7730.0 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)