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
2021-12-15 02:53:54 s 1 -171284.04 3 +81227.926 770.0 C57
2021-12-15 03:53:54 S 12 08 45.818 +07 12 38.77 V C57
2021-12-15 03:53:54 s 1 -170164.29 5 +75907.079 1580.0 C57
2021-12-15 04:13:54 S 12 08 47.846 +07 12 21.46 V C57
2021-12-15 04:13:54 s 1 -169766.79 9 +74122.484 5290.0 C57
2021-12-15 04:23:54 S 12 08 48.823 +07 12 12.67 V C57
2021-12-15 04:23:54 s 1 -169563.40 9 +73228.149 2400.0 C57
2021-12-15 04:43:54 S 12 08 51.058 +07 11 49.56 V C57
2021-12-15 04:43:54 s 1 -169147.23 4 +71435.433 6670.0 C57
2021-12-15 05:03:54 S 12 08 52.894 +07 11 36.24 V C57
2021-12-15 05:03:54 s 1 -168718.38 4 +69637.356 7080.0 C57
2021-12-15 06:33:54 S 12 09 02.491 +07 10 00.05 V C57
2021-12-15 06:33:54 s 1 -166626.78 6 +61481.003 2410.0 C57
2021-12-15 06:43:54 S 12 09 03.329 +07 09 54.18 V C57
2021-12-15 06:43:54 s 1 -166377.57 0 +60568.310 5060.0 C57
2021-12-15 06:53:54 S 12 09 04.632 +07 09 39.35 V C57
2021-12-15 06:53:54 s 1 -166124.90 1 +59654.358 3100.0 C57
2021-12-15 07:03:54 S 12 09 05.573 +07 09 29.52 V C57
2021-12-15 07:03:54 s 1 -165868.75 3 +58739.156 6410.0 C57
2021-12-15 07:13:54 S 12 09 06.715 +07 09 20.77 V C57
2021-12-15 07:13:54 s 1 -165609.10 3 +57822.710 4890.0 C57
2021-12-15 07:23:54 S 12 09 07.853 +07 09 14.18 V C57
2021-12-15 07:23:54 s 1 -165345.92 2 +56905.030 8450.0 C57
2021-12-15 07:33:54 S 12 09 08.585 +07 09 05.15 V C57
2021-12-15 07:33:54 s 1 -165079.18 7 +55986.125 6980.0 C57
2021-12-15 07:43:54 S 12 09 09.418 +07 08 52.04 V C57
2021-12-15 07:43:54 s 1 -164808.87 0 +55066.002 370.0 C57
2021-12-15 07:53:54 S 12 09 10.718 +07 08 43.22 V C57
2021-12-15 07:53:54 s 1 -164534.94 6 +54144.673 8510.0 C57
2021-12-15 08:03:54 S 12 09 11.849 +07 08 30.84 V C57
2021-12-15 08:03:54 s 1 -164257.38 7 +53222.145 1300.0 C57
2021-12-15 08:13:54 S 12 09 12.701 +07 08 27.13 V C57
2021-12-15 08:13:54 s 1 -163976.16 7 +52298.428 8630.0 C57
2021-12-15 09:03:54 S 12 09 17.962 +07 07 31.04 V C57
2021-12-15 09:03:54 s 1 -162514.19 2 +47662.377 9510.0 C57
2021-12-15 09:13:54 S 12 09 18.775 +07 07 24.38 V C57
2021-12-15 09:13:54 s 1 -162210.42 6 +46731.747 1740.0 C57
2021-12-15 09:23:54 S 12 09 19.966 +07 07 15.20 V C57
2021-12-15 09:23:54 s 1 -161902.80 4 +45800.005 7730.0 C57
2021-12-15 09:33:54 S 12 09 20.952 +07 07 00.05 V C57
2021-12-15 09:33:54 s 1 -161591.29 6 +44867.160 7350.0 C57
2021-12-15 09:53:54 S 12 09 23.244 +07 06 43.20 V C57
2021-12-15 09:53:54 s 1 -160956.50 7 +42998.217 7020.0 C57
2021-12-15 10:03:54 S 12 09 24.168 +07 06 31.72 V C57
2021-12-15 10:03:54 s 1 -160633.16 7 +42062.143 6840.0 C57
2021-12-15 10:13:54 S 12 09 25.284 +07 06 23.69 V C57
2021-12-15 10:13:54 s 1 -160305.82 2 +41125.018 9820.0 C57
2021-12-15 10:23:54 S 12 09 26.119 +07 06 11.84 V C57
2021-12-15 10:23:54 s 1 -159974.44 3 +40186.855 5830.0 C57
2021-12-15 10:33:54 S 12 09 27.192 +07 06 00.72 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)