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
2021-11-08 15:03:56 s 1 +174672.06 4 +131838.35 5420.0 C57
2021-11-08 15:13:56 S 10 36 38.827 +19 05 05.35 V C57
2021-11-08 15:13:56 s 1 +174715.83 6 +132639.98 3840.0 C57
2021-11-08 15:33:56 S 10 36 41.107 +19 04 53.94 V C57
2021-11-08 15:33:56 s 1 +174797.01 7 +134238.44 8270.0 C57
2021-11-08 15:43:56 S 10 36 41.940 +19 04 41.02 V C57
2021-11-08 15:43:56 s 1 +174834.45 2 +135035.27 4380.0 C57
2021-11-08 15:53:56 S 10 36 43.162 +19 04 37.13 V C57
2021-11-08 15:53:56 s 1 +174869.80 2 +135830.49 3160.0 C57
2021-11-08 17:43:56 S 10 36 55.106 +19 03 32.33 V C57
2021-11-08 17:43:56 s 1 +175124.67 2 +144472.50 8410.0 C57
2021-11-08 18:03:56 S 10 36 56.933 +19 03 18.79 V C57
2021-11-08 18:03:56 s 1 +175145.37 4 +146023.09 140.0 C57
2021-11-08 18:23:56 S 10 36 59.249 +19 03 02.16 V C57
2021-11-08 18:23:56 s 1 +175158.42 7 +147567.32 4980.0 C57
2021-11-08 20:23:56 S 10 37 11.690 +19 01 44.65 V C57
2021-11-08 20:23:56 s 1 +175081.19 1 +156700.21 7550.0 C57
2021-11-08 20:43:56 S 10 37 14.251 +19 01 36.48 V C57
2021-11-08 20:43:56 s 1 +175043.20 6 +158200.38 3130.0 C57
2021-11-08 21:03:56 S 10 37 16.121 +19 01 23.27 V C57
2021-11-08 21:03:56 s 1 +174998.27 0 +159694.30 4310.0 C57
2021-11-08 21:13:56 S 10 37 17.662 +19 01 16.32 V C57
2021-11-08 21:13:56 s 1 +174973.22 0 +160438.92 850.0 C57
2021-11-08 23:03:56 S 10 37 29.038 +19 00 03.02 V C57
2021-11-08 23:03:56 s 1 +174587.12 4 +168527.37 4870.0 C57
2021-11-08 23:23:56 S 10 37 31.207 +18 59 47.18 V C57
2021-11-08 23:23:56 s 1 +174495.72 6 +169977.93 3080.0 C57
2021-11-09 01:23:56 S 10 37 43.781 +18 58 25.72 V C57
2021-11-09 01:23:56 s 1 +173816.67 9 +178552.89 4440.0 C57
2021-11-09 01:53:56 S 10 37 47.244 +18 58 08.65 V C57
2021-11-09 01:53:56 s 1 +173613.01 0 +180662.46 3500.0 C57
2021-11-09 02:13:56 S 10 37 49.258 +18 57 59.76 V C57
2021-11-09 02:13:56 s 1 +173469.92 9 +182061.30 650.0 C57
2021-11-09 02:23:56 S 10 37 50.443 +18 57 49.00 V C57
2021-11-09 02:23:56 s 1 +173396.22 2 +182758.46 6630.0 C57
2021-11-09 03:43:56 S 10 37 58.536 +18 57 00.61 V C57
2021-11-09 03:43:56 s 1 +172755.59 5 +188281.81 6140.0 C57
2021-11-09 07:23:56 S 10 38 22.075 +18 54 36.83 V C57
2021-11-09 07:23:56 s 1 +170551.54 3 +202982.96 470.0 C57
2021-11-09 07:33:56 S 10 38 23.338 +18 54 32.87 V C57
2021-11-09 07:33:56 s 1 +170436.76 4 +203634.41 2850.0 C57
2021-11-09 09:53:56 S 10 38 37.958 +18 52 56.53 V C57
2021-11-09 09:53:56 s 1 +168704.84 6 +212603.73 9850.0 C57
2021-11-09 10:13:56 S 10 38 39.910 +18 52 43.18 V C57
2021-11-09 10:13:56 s 1 +168438.92 0 +213862.23 7700.0 C57
2021-11-09 10:23:56 S 10 38 41.424 +18 52 30.90 V C57
2021-11-09 10:23:56 s 1 +168304.27 0 +214489.35 740.0 C57
2021-11-09 11:53:56 S 10 38 50.892 +18 51 31.07 V C57
2021-11-09 11:53:56 s 1 +167042.83 2 +220070.06 5250.0 C57
2021-11-09 12:03:56 S 10 38 51.768 +18 51 29.23 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)