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
2021-12-08 00:53:55 s 1 +87437.759 0 +359614.53 2410.0 C57
2021-12-08 01:03:55 S 11 50 23.582 +09 57 52.20 V C57
2021-12-08 01:03:55 s 1 +87118.933 0 +359853.95 2820.0 C57
2021-12-08 02:23:55 S 11 50 32.393 +09 56 39.01 V C57
2021-12-08 02:23:55 s 1 +84559.451 0 +361733.45 7280.0 C57
2021-12-08 02:33:55 S 11 50 33.478 +09 56 32.86 V C57
2021-12-08 02:33:55 s 1 +84238.424 0 +361963.91 560.0 C57
2021-12-08 02:43:55 S 11 50 34.397 +09 56 22.63 V C57
2021-12-08 02:43:55 s 1 +83917.158 0 +362193.37 3080.0 C57
2021-12-08 02:53:55 S 11 50 35.573 +09 56 11.72 V C57
2021-12-08 02:53:55 s 1 +83595.654 0 +362421.85 4820.0 C57
2021-12-08 03:03:55 S 11 50 36.518 +09 56 01.90 V C57
2021-12-08 03:03:55 s 1 +83273.914 0 +362649.33 5810.0 C57
2021-12-08 03:13:55 S 11 50 37.798 +09 55 57.36 V C57
2021-12-08 03:13:55 s 1 +82951.939 0 +362875.82 6040.0 C57
2021-12-08 03:23:55 S 11 50 38.933 +09 55 48.58 V C57
2021-12-08 03:23:55 s 1 +82629.730 0 +363101.33 5520.0 C57
2021-12-08 03:43:55 S 11 50 40.954 +09 55 20.89 V C57
2021-12-08 03:43:55 s 1 +81984.613 0 +363549.35 2250.0 C57
2021-12-08 03:53:55 S 11 50 41.705 +09 55 20.75 V C57
2021-12-08 03:53:55 s 1 +81661.708 0 +363771.89 9510.0 C57
2021-12-08 04:53:55 S 11 50 48.770 +09 54 17.21 V C57
2021-12-08 04:53:55 s 1 +79719.495 0 +365086.31 7830.0 C57
2021-12-08 05:03:55 S 11 50 49.850 +09 54 11.16 V C57
2021-12-08 05:03:55 s 1 +79395.006 0 +365301.93 50.0 C57
2021-12-08 05:13:55 S 11 50 51.173 +09 54 00.32 V C57
2021-12-08 05:13:55 s 1 +79070.296 0 +365516.56 1570.0 C57
2021-12-08 05:23:55 S 11 50 51.938 +09 53 51.83 V C57
2021-12-08 05:23:55 s 1 +78745.365 0 +365730.21 2400.0 C57
2021-12-08 05:33:55 S 11 50 53.074 +09 53 44.74 V C57
2021-12-08 05:33:55 s 1 +78420.214 0 +365942.87 2530.0 C57
2021-12-08 05:43:55 S 11 50 54.091 +09 53 35.05 V C57
2021-12-08 05:43:55 s 1 +78094.845 0 +366154.54 1970.0 C57
2021-12-08 05:53:55 S 11 50 55.190 +09 53 26.52 V C57
2021-12-08 05:53:55 s 1 +77769.258 0 +366365.24 730.0 C57
2021-12-08 06:03:55 S 11 50 56.326 +09 53 14.35 V C57
2021-12-08 06:03:55 s 1 +77443.456 0 +366574.95 8810.0 C57
2021-12-08 06:13:55 S 11 50 57.559 +09 53 06.94 V C57
2021-12-08 06:13:55 s 1 +77117.438 0 +366783.67 6220.0 C57
2021-12-08 07:33:55 S 11 51 06.516 +09 51 49.82 V C57
2021-12-08 07:33:55 s 1 +74501.682 0 +368418.15 1700.0 C57
2021-12-08 07:43:55 S 11 51 07.238 +09 51 41.29 V C57
2021-12-08 07:43:55 s 1 +74173.778 0 +368618.05 3230.0 C57
2021-12-08 07:53:55 S 11 51 08.510 +09 51 31.82 V C57
2021-12-08 07:53:55 s 1 +73845.668 0 +368816.97 4120.0 C57
2021-12-08 08:03:55 S 11 51 09.588 +09 51 23.51 V C57
2021-12-08 08:03:55 s 1 +73517.356 0 +369014.91 4390.0 C57
2021-12-08 08:13:55 S 11 51 10.642 +09 51 14.40 V C57
2021-12-08 08:13:55 s 1 +73188.842 0 +369211.87 4040.0 C57
2021-12-08 08:23:55 S 11 51 11.837 +09 51 07.78 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)