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
2021-11-15 01:43:56 S 10 52 35.431 +17 20 11.58 V C57
2021-11-15 01:43:56 s 1 -82074.347 0 +347536.60 4760.0 C57
2021-11-15 03:43:56 S 10 52 47.215 +17 18 46.04 V C57
2021-11-15 03:43:56 s 1 -85984.901 0 +344367.64 5550.0 C57
2021-11-15 04:03:56 S 10 52 49.020 +17 18 33.23 V C57
2021-11-15 04:03:56 s 1 -86632.923 0 +343824.26 2770.0 C57
2021-11-15 04:13:56 S 10 52 50.177 +17 18 25.20 V C57
2021-11-15 04:13:56 s 1 -86956.522 0 +343550.94 9610.0 C57
2021-11-15 04:23:56 S 10 52 51.686 +17 18 17.42 V C57
2021-11-15 04:23:56 s 1 -87279.845 0 +343276.53 5240.0 C57
2021-11-15 04:33:56 S 10 52 52.505 +17 18 06.44 V C57
2021-11-15 04:33:56 s 1 -87602.892 0 +343001.03 9680.0 C57
2021-11-15 06:23:56 S 10 53 03.686 +17 16 51.06 V C57
2021-11-15 06:23:56 s 1 -91137.677 0 +339898.22 7660.0 C57
2021-11-15 08:53:56 S 10 53 18.211 +17 15 11.12 V C57
2021-11-15 08:53:56 s 1 -95899.923 0 +335452.26 5080.0 C57
2021-11-15 09:03:56 S 10 53 19.296 +17 15 01.73 V C57
2021-11-15 09:03:56 s 1 -96214.921 0 +335146.99 4940.0 C57
2021-11-15 09:23:56 S 10 53 21.312 +17 14 45.85 V C57
2021-11-15 09:23:56 s 1 -96843.957 0 +334533.12 560.0 C57
2021-11-15 09:33:56 S 10 53 22.579 +17 14 33.43 V C57
2021-11-15 09:33:56 s 1 -97157.991 0 +334224.50 6310.0 C57
2021-11-15 09:53:56 S 10 53 24.017 +17 14 25.76 V C57
2021-11-15 09:53:56 s 1 -97785.087 0 +333603.93 3660.0 C57
2021-11-15 11:13:56 S 10 53 32.510 +17 13 25.86 V C57
2021-11-15 11:13:56 s 1 -100280.24 4 +331076.86 6770.0 C57
2021-11-15 11:33:56 S 10 53 34.198 +17 13 10.16 V C57
2021-11-15 11:33:56 s 1 -100900.66 3 +330433.87 5730.0 C57
2021-11-15 12:43:56 S 10 53 41.114 +17 12 23.80 V C57
2021-11-15 12:43:56 s 1 -103061.21 4 +328147.86 5830.0 C57
2021-11-15 14:33:56 S 10 53 52.202 +17 11 06.18 V C57
2021-11-15 14:33:56 s 1 -106420.73 9 +324445.28 5170.0 C57
2021-11-15 15:03:56 S 10 53 55.092 +17 10 42.46 V C57
2021-11-15 15:03:56 s 1 -107329.26 6 +323411.02 260.0 C57
2021-11-15 16:43:56 S 10 54 05.124 +17 09 37.04 V C57
2021-11-15 16:43:56 s 1 -110332.72 2 +319888.89 8960.0 C57
2021-11-15 16:53:56 S 10 54 06.427 +17 09 19.73 V C57
2021-11-15 16:53:56 s 1 -110630.90 8 +319530.34 7770.0 C57
2021-11-15 17:33:56 S 10 54 10.570 +17 08 53.81 V C57
2021-11-15 17:33:56 s 1 -111819.63 4 +318084.56 6170.0 C57
2021-11-15 19:13:56 S 10 54 20.314 +17 07 46.20 V C57
2021-11-15 19:13:56 s 1 -114762.65 0 +314388.74 1770.0 C57
2021-11-15 19:43:56 S 10 54 23.194 +17 07 23.45 V C57
2021-11-15 19:43:56 s 1 -115637.31 8 +313257.21 5080.0 C57
2021-11-15 20:03:56 S 10 54 24.876 +17 07 05.27 V C57
2021-11-15 20:03:56 s 1 -116218.26 8 +312496.99 8280.0 C57
2021-11-15 20:13:56 S 10 54 26.297 +17 07 00.62 V C57
2021-11-15 20:13:56 s 1 -116508.08 9 +312115.12 2160.0 C57
2021-11-15 20:23:56 S 10 54 26.664 +17 06 54.22 V C57
2021-11-15 20:23:56 s 1 -116797.47 1 +311732.07 4210.0 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)