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
2021-11-17 22:13:56 S 10 59 21.516 +16 30 58.72 V C57
2021-11-17 22:13:56 s 1 -169638.05 2 +138021.58 2440.0 C57
2021-11-17 23:33:56 S 10 59 29.489 +16 29 55.36 V C57
2021-11-17 23:33:56 s 1 -169495.67 1 +131536.75 7940.0 C57
2021-11-17 23:43:56 S 10 59 30.010 +16 29 48.19 V C57
2021-11-17 23:43:56 s 1 -169468.31 5 +130718.61 2850.0 C57
2021-11-17 23:53:56 S 10 59 31.298 +16 29 45.10 V C57
2021-11-17 23:53:56 s 1 -169438.78 8 +129898.78 9340.0 C57
2021-11-18 00:03:56 S 10 59 32.064 +16 29 30.77 V C57
2021-11-18 00:03:56 s 1 -169407.07 5 +129077.28 7380.0 C57
2021-11-18 00:13:56 S 10 59 33.334 +16 29 23.10 V C57
2021-11-18 00:13:56 s 1 -169373.16 3 +128254.10 6900.0 C57
2021-11-18 00:33:56 S 10 59 34.970 +16 29 11.26 V C57
2021-11-18 00:33:56 s 1 -169298.67 8 +126602.68 180.0 C57
2021-11-18 02:13:56 S 10 59 44.911 +16 27 59.15 V C57
2021-11-18 02:13:56 s 1 -168789.11 7 +118244.55 6440.0 C57
2021-11-18 02:23:56 S 10 59 45.677 +16 27 48.82 V C57
2021-11-18 02:23:56 s 1 -168725.21 5 +117399.46 70.0 C57
2021-11-18 02:33:56 S 10 59 46.661 +16 27 44.64 V C57
2021-11-18 02:33:56 s 1 -168658.89 4 +116552.68 4370.0 C57
2021-11-18 02:53:56 S 10 59 48.684 +16 27 29.84 V C57
2021-11-18 02:53:56 s 1 -168518.92 9 +114854.06 4710.0 C57
2021-11-18 04:43:56 S 10 59 59.316 +16 26 07.69 V C57
2021-11-18 04:43:56 s 1 -167568.77 4 +105391.04 1620.0 C57
2021-11-18 04:53:56 S 11 00 00.134 +16 26 06.18 V C57
2021-11-18 04:53:56 s 1 -167466.75 7 +104520.66 8410.0 C57
2021-11-18 05:03:56 S 11 00 01.282 +16 25 55.13 V C57
2021-11-18 05:03:56 s 1 -167362.05 3 +103648.59 4860.0 C57
2021-11-18 05:13:56 S 11 00 02.215 +16 25 50.09 V C57
2021-11-18 05:13:56 s 1 -167254.64 2 +102774.84 910.0 C57
2021-11-18 05:23:56 S 11 00 03.478 +16 25 38.32 V C57
2021-11-18 05:23:56 s 1 -167144.50 4 +101899.42 6470.0 C57
2021-11-18 05:33:56 S 11 00 04.457 +16 25 32.74 V C57
2021-11-18 05:33:56 s 1 -167031.62 1 +101022.31 1480.0 C57
2021-11-18 05:43:56 S 11 00 05.045 +16 25 27.77 V C57
2021-11-18 05:43:56 s 1 -166915.97 2 +100143.52 5860.0 C57
2021-11-18 07:23:56 S 11 00 14.729 +16 24 12.71 V C57
2021-11-18 07:23:56 s 1 -165602.82 7 +91263.745 8290.0 C57
2021-11-18 07:33:56 S 11 00 15.804 +16 24 05.11 V C57
2021-11-18 07:33:56 s 1 -165455.38 0 +90366.616 660.0 C57
2021-11-18 07:43:56 S 11 00 16.385 +16 23 55.68 V C57
2021-11-18 07:43:56 s 1 -165304.91 3 +89467.831 1460.0 C57
2021-11-18 07:53:56 S 11 00 17.674 +16 23 53.84 V C57
2021-11-18 07:53:56 s 1 -165151.40 2 +88567.394 590.0 C57
2021-11-18 08:03:56 S 11 00 18.506 +16 23 41.10 V C57
2021-11-18 08:03:56 s 1 -164994.82 5 +87665.308 7980.0 C57
2021-11-18 10:13:56 S 11 00 31.284 +16 22 10.02 V C57
2021-11-18 10:13:56 s 1 -162669.43 6 +75789.610 5030.0 C57
2021-11-18 10:33:56 S 11 00 33.422 +16 21 52.96 V C57
2021-11-18 10:33:56 s 1 -162261.91 0 +73938.410 9010.0 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)