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
2021-12-20 09:13:55 s 1 +145052.15 4 +288422.14 5420.0 C57
2021-12-20 09:23:55 S 12 23 20.186 +05 03 56.05 V C57
2021-12-20 09:23:55 s 1 +144807.17 7 +288882.93 8080.0 C57
2021-12-20 09:33:55 S 12 23 21.338 +05 03 45.29 V C57
2021-12-20 09:33:55 s 1 +144561.59 7 +289342.53 8510.0 C57
2021-12-20 09:43:55 S 12 23 22.502 +05 03 34.70 V C57
2021-12-20 09:43:55 s 1 +144315.41 5 +289800.96 6720.0 C57
2021-12-20 10:03:55 S 12 23 25.085 +05 03 14.44 V C57
2021-12-20 10:03:55 s 1 +143821.25 8 +290714.27 6510.0 C57
2021-12-20 10:13:55 S 12 23 26.174 +05 03 02.45 V C57
2021-12-20 10:13:55 s 1 +143573.28 8 +291169.15 8110.0 C57
2021-12-20 10:23:55 S 12 23 27.290 +05 02 50.96 V C57
2021-12-20 10:23:55 s 1 +143324.72 6 +291622.86 7520.0 C57
2021-12-20 10:33:55 S 12 23 28.339 +05 02 41.46 V C57
2021-12-20 10:33:55 s 1 +143075.57 5 +292075.39 4770.0 C57
2021-12-20 10:43:55 S 12 23 29.873 +05 02 29.04 V C57
2021-12-20 10:43:55 s 1 +142825.83 8 +292526.74 9850.0 C57
2021-12-20 11:03:55 S 12 23 32.328 +05 02 13.85 V C57
2021-12-20 11:03:55 s 1 +142324.61 4 +293425.93 3550.0 C57
2021-12-20 11:53:55 S 12 23 38.270 +05 01 14.92 V C57
2021-12-20 11:53:55 s 1 +141061.46 2 +295653.41 5650.0 C57
2021-12-20 12:03:55 S 12 23 39.413 +05 01 01.49 V C57
2021-12-20 12:03:55 s 1 +140807.12 1 +296095.41 3770.0 C57
2021-12-20 12:13:55 S 12 23 40.558 +05 00 49.21 V C57
2021-12-20 12:13:55 s 1 +140552.21 4 +296536.23 9820.0 C57
2021-12-20 12:23:55 S 12 23 41.938 +05 00 39.06 V C57
2021-12-20 12:23:55 s 1 +140296.74 6 +296975.89 3800.0 C57
2021-12-20 12:33:55 S 12 23 43.114 +05 00 31.75 V C57
2021-12-20 12:33:55 s 1 +140040.71 7 +297414.39 5720.0 C57
2021-12-20 12:53:55 S 12 23 45.456 +05 00 08.10 V C57
2021-12-20 12:53:55 s 1 +139526.98 8 +298287.91 3430.0 C57
2021-12-20 13:03:55 S 12 23 46.558 +04 59 57.05 V C57
2021-12-20 13:03:55 s 1 +139269.29 2 +298722.92 9230.0 C57
2021-12-20 13:13:55 S 12 23 47.760 +04 59 43.76 V C57
2021-12-20 13:13:55 s 1 +139011.04 6 +299156.78 3020.0 C57
2021-12-20 13:33:55 S 12 23 50.311 +04 59 18.96 V C57
2021-12-20 13:33:55 s 1 +138492.91 0 +300021.01 4560.0 C57
2021-12-20 14:23:55 S 12 23 56.491 +04 58 28.52 V C57
2021-12-20 14:23:55 s 1 +137188.08 7 +302161.40 3720.0 C57
2021-12-20 14:43:55 S 12 23 58.606 +04 58 09.52 V C57
2021-12-20 14:43:55 s 1 +136662.41 2 +303009.49 7680.0 C57
2021-12-20 14:53:55 S 12 23 59.798 +04 57 57.60 V C57
2021-12-20 14:53:55 s 1 +136398.78 0 +303431.81 1760.0 C57
2021-12-20 15:03:55 S 12 24 01.150 +04 57 44.89 V C57
2021-12-20 15:03:55 s 1 +136134.62 3 +303852.98 3920.0 C57
2021-12-20 15:13:55 S 12 24 02.050 +04 57 35.68 V C57
2021-12-20 15:13:55 s 1 +135869.94 1 +304273.01 4170.0 C57
2021-12-20 15:23:55 S 12 24 03.456 +04 57 22.97 V C57
2021-12-20 15:23:55 s 1 +135604.73 7 +304691.89 2520.0 C57
2021-12-20 15:33:55 S 12 24 04.685 +04 57 14.00 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)