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
2021-12-14 05:53:54 s 1 -175608.59 3 +180883.35 4310.0 C57
2021-12-14 06:03:54 S 12 06 28.610 +07 34 29.78 V C57
2021-12-14 06:03:54 s 1 -175684.91 8 +180183.36 130.0 C57
2021-12-14 07:03:54 S 12 06 35.436 +07 33 26.06 V C57
2021-12-14 07:03:54 s 1 -176113.60 5 +175953.59 6110.0 C57
2021-12-14 07:13:54 S 12 06 36.074 +07 33 12.60 V C57
2021-12-14 07:13:54 s 1 -176180.10 5 +175243.65 8660.0 C57
2021-12-14 07:33:54 S 12 06 38.167 +07 32 52.12 V C57
2021-12-14 07:33:54 s 1 -176308.79 6 +173819.48 4810.0 C57
2021-12-14 07:43:54 S 12 06 39.223 +07 32 45.82 V C57
2021-12-14 07:43:54 s 1 -176370.97 2 +173105.25 8340.0 C57
2021-12-14 07:53:54 S 12 06 40.375 +07 32 35.16 V C57
2021-12-14 07:53:54 s 1 -176431.69 0 +172389.60 5470.0 C57
2021-12-14 08:03:54 S 12 06 41.371 +07 32 23.10 V C57
2021-12-14 08:03:54 s 1 -176490.94 4 +171672.51 6160.0 C57
2021-12-14 08:13:54 S 12 06 42.415 +07 32 16.44 V C57
2021-12-14 08:13:54 s 1 -176548.72 5 +170953.99 390.0 C57
2021-12-14 08:23:54 S 12 06 43.826 +07 32 07.19 V C57
2021-12-14 08:23:54 s 1 -176605.02 4 +170234.03 8100.0 C57
2021-12-14 08:33:54 S 12 06 44.578 +07 31 53.87 V C57
2021-12-14 08:33:54 s 1 -176659.83 5 +169512.64 9280.0 C57
2021-12-14 09:33:54 S 12 06 50.933 +07 30 55.22 V C57
2021-12-14 09:33:54 s 1 -176956.97 6 +165154.08 7140.0 C57
2021-12-14 09:43:54 S 12 06 52.236 +07 30 44.21 V C57
2021-12-14 09:43:54 s 1 -177001.13 5 +164422.60 1590.0 C57
2021-12-14 09:53:54 S 12 06 52.915 +07 30 40.93 V C57
2021-12-14 09:53:54 s 1 -177043.73 7 +163689.68 9230.0 C57
2021-12-14 10:03:54 S 12 06 53.986 +07 30 24.88 V C57
2021-12-14 10:03:54 s 1 -177084.77 6 +162955.32 10.0 C57
2021-12-14 10:13:54 S 12 06 55.236 +07 30 14.08 V C57
2021-12-14 10:13:54 s 1 -177124.24 2 +162219.50 3900.0 C57
2021-12-14 10:23:54 S 12 06 56.033 +07 30 06.19 V C57
2021-12-14 10:23:54 s 1 -177162.12 7 +161482.24 870.0 C57
2021-12-14 10:43:54 S 12 06 58.219 +07 29 44.56 V C57
2021-12-14 10:43:54 s 1 -177233.11 7 +160003.36 3890.0 C57
2021-12-14 10:53:54 S 12 06 59.302 +07 29 34.58 V C57
2021-12-14 10:53:54 s 1 -177266.20 5 +159261.75 9860.0 C57
2021-12-14 11:03:54 S 12 07 00.386 +07 29 24.00 V C57
2021-12-14 11:03:54 s 1 -177297.67 5 +158518.68 8760.0 C57
2021-12-14 11:13:54 S 12 07 01.267 +07 29 16.80 V C57
2021-12-14 11:13:54 s 1 -177327.51 9 +157774.15 550.0 C57
2021-12-14 12:33:54 S 12 07 09.826 +07 27 51.48 V C57
2021-12-14 12:33:54 s 1 -177506.62 4 +151765.48 4210.0 C57
2021-12-14 12:43:54 S 12 07 10.788 +07 27 47.88 V C57
2021-12-14 12:43:54 s 1 -177521.41 4 +151007.82 250.0 C57
2021-12-14 12:53:54 S 12 07 11.834 +07 27 37.15 V C57
2021-12-14 12:53:54 s 1 -177534.48 4 +150248.70 8780.0 C57
2021-12-14 13:03:54 S 12 07 12.984 +07 27 24.91 V C57
2021-12-14 13:03:54 s 1 -177545.82 3 +149488.11 9770.0 C57
2021-12-14 13:13:54 S 12 07 14.143 +07 27 14.44 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)