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
2021-12-12 00:13:54 s 1 -105570.69 8 +340306.05 5760.0 C57
2021-12-12 00:23:54 S 12 00 45.802 +08 27 18.54 V C57
2021-12-12 00:23:54 s 1 -105875.49 1 +339994.14 4790.0 C57
2021-12-12 00:33:54 S 12 00 46.997 +08 27 09.72 V C57
2021-12-12 00:33:54 s 1 -106179.96 3 +339681.20 2230.0 C57
2021-12-12 00:43:54 S 12 00 47.875 +08 26 57.62 V C57
2021-12-12 00:43:54 s 1 -106484.11 0 +339367.21 8080.0 C57
2021-12-12 01:13:54 S 12 00 51.391 +08 26 29.29 V C57
2021-12-12 01:13:54 s 1 -107394.59 6 +338419.00 6040.0 C57
2021-12-12 01:23:54 S 12 00 52.195 +08 26 18.20 V C57
2021-12-12 01:23:54 s 1 -107697.43 4 +338100.84 5470.0 C57
2021-12-12 01:33:54 S 12 00 53.388 +08 26 07.19 V C57
2021-12-12 01:33:54 s 1 -107999.94 1 +337781.63 3280.0 C57
2021-12-12 01:53:54 S 12 00 55.298 +08 25 51.06 V C57
2021-12-12 01:53:54 s 1 -108603.95 6 +337140.08 4020.0 C57
2021-12-12 02:53:54 S 12 01 01.627 +08 24 52.78 V C57
2021-12-12 02:53:54 s 1 -110407.89 8 +335190.25 6670.0 C57
2021-12-12 03:03:54 S 12 01 02.962 +08 24 40.90 V C57
2021-12-12 03:03:54 s 1 -110707.35 8 +334861.60 9610.0 C57
2021-12-12 03:13:54 S 12 01 03.948 +08 24 31.82 V C57
2021-12-12 03:13:54 s 1 -111006.47 1 +334531.90 860.0 C57
2021-12-12 03:23:54 S 12 01 05.191 +08 24 18.83 V C57
2021-12-12 03:23:54 s 1 -111305.23 7 +334201.14 420.0 C57
2021-12-12 03:33:54 S 12 01 06.293 +08 24 09.86 V C57
2021-12-12 03:33:54 s 1 -111603.65 3 +333869.33 8280.0 C57
2021-12-12 03:43:54 S 12 01 07.370 +08 24 00.07 V C57
2021-12-12 03:43:54 s 1 -111901.71 9 +333536.47 4430.0 C57
2021-12-12 03:53:54 S 12 01 08.378 +08 23 51.14 V C57
2021-12-12 03:53:54 s 1 -112199.43 2 +333202.55 8880.0 C57
2021-12-12 04:03:54 S 12 01 09.341 +08 23 40.45 V C57
2021-12-12 04:03:54 s 1 -112496.79 1 +332867.57 1600.0 C57
2021-12-12 04:13:54 S 12 01 10.258 +08 23 35.38 V C57
2021-12-12 04:13:54 s 1 -112793.79 5 +332531.54 2600.0 C57
2021-12-12 05:23:54 S 12 01 17.993 +08 22 25.64 V C57
2021-12-12 05:23:54 s 1 -114862.73 3 +330149.63 680.0 C57
2021-12-12 05:43:54 S 12 01 20.208 +08 22 06.92 V C57
2021-12-12 05:43:54 s 1 -115450.56 8 +329459.53 2780.0 C57
2021-12-12 05:53:54 S 12 01 21.394 +08 21 56.38 V C57
2021-12-12 05:53:54 s 1 -115743.93 0 +329112.88 6140.0 C57
2021-12-12 06:03:54 S 12 01 22.279 +08 21 47.92 V C57
2021-12-12 06:03:54 s 1 -116036.91 8 +328765.16 7700.0 C57
2021-12-12 06:13:54 S 12 01 23.369 +08 21 35.35 V C57
2021-12-12 06:13:54 s 1 -116329.53 1 +328416.38 7450.0 C57
2021-12-12 06:23:54 S 12 01 24.634 +08 21 25.63 V C57
2021-12-12 06:23:54 s 1 -116621.76 7 +328066.53 5390.0 C57
2021-12-12 06:33:54 S 12 01 25.740 +08 21 15.98 V C57
2021-12-12 06:33:54 s 1 -116913.62 6 +327715.61 1500.0 C57
2021-12-12 06:43:54 S 12 01 26.678 +08 21 06.52 V C57
2021-12-12 06:43:54 s 1 -117205.10 5 +327363.63 5780.0 C57
2021-12-12 06:53:54 S 12 01 27.571 +08 21 00.32 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)