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
2015-11-05 04:46:03 C 02 50 46.19 +49 29 42.0 u H21
2015-11-05 04:48:21 C 02 50 45.86 +49 29 41.6 u H21
2015-11-05 04:52:16 C 02 50 45.31 +49 29 40.4 u H21
2015-11-05 23:31:27 C 02 48 14.76 +49 25 36.5 c A24
2015-11-05 23:32:29 C 02 48 14.65 +49 25 36.1 c A24
2015-11-06 00:31:32 C 02 48 06.49 +49 25 22.0 c A24
2015-11-06 00:32:34 C 02 48 06.37 +49 25 21.6 c A24
2015-11-06 20:05:49 C 02 45 30.67 +49 20 25.0 r 006
2015-11-06 20:13:30 C 02 45 29.63 +49 20 22.9 r 006
2015-11-06 20:20:10 C 02 45 28.70 +49 20 21.1 r 006
2015-11-06 20:27:09 C 02 45 27.80 +49 20 19.7 r 006
2015-11-08 00:24:04 C 02 41 43.85 +49 12 08.6 o C41
2015-11-08 00:29:18 C 02 41 43.18 +49 12 07.4 o C41
2015-11-08 07:06:57 C 02 40 51.25 +49 10 04.2 q H45
2015-11-08 07:08:29 C 02 40 51.04 +49 10 03.6 q H45
2015-11-08 07:15:21 C 02 40 50.11 +49 10 01.4 q H45
2015-11-08 07:16:16 C 02 40 49.99 +49 10 01.1 q H45
2015-11-08 07:17:30 C 02 40 49.80 +49 10 00.6 q H45
2015-11-08 07:20:14 C 02 40 49.44 +49 09 59.6 q H45
2015-11-08 17:34:35 C 02 39 30.34 +49 06 27.7 q K73
2015-11-09 18:47:30 C 02 36 13.72 +48 57 22.5 q K73
2015-11-09 19:59:59 C 02 36 03.97 +48 56 54.6 q K73
2015-11-09 22:58:52 C 02 35 40.28 +48 55 47.0 c A24
2015-11-09 22:59:54 C 02 35 40.18 +48 55 46.3 c A24
2015-11-10 00:01:04 C 02 35 32.08 +48 55 22.1 c A24
2015-11-10 00:02:07 C 02 35 31.93 +48 55 21.6 c A24
2015-11-10 02:56:08 C 02 35 10.79 +48 54 13.0 u H15
2015-11-10 03:09:51 C 02 35 08.95 +48 54 08.4 u H15
2015-11-10 03:23:38 C 02 35 07.17 +48 54 03.0 u H15
2015-11-10 22:27:31 C 02 32 40.57 +48 46 13.4 c A24
2015-11-10 22:28:33 C 02 32 40.45 +48 46 12.9 c A24
2015-11-10 23:31:29 C 02 32 32.22 +48 45 45.7 c A24
2015-11-10 23:32:33 C 02 32 32.08 +48 45 45.9 c A24
2015-11-11 18:28:08 C 02 30 10.20 +48 37 22.7 q K73
2015-11-11 19:08:54 C 02 30 05.24 +48 37 06.0 q K73
2015-11-11 19:32:17 C 02 30 02.26 +48 36 55.7 q K73
2015-11-11 20:15:34 C 02 29 56.86 +48 36 34.1 r 006
2015-11-11 20:25:21 C 02 29 55.54 +48 36 31.5 r 006
2015-11-11 20:32:10 C 02 29 54.69 +48 36 28.5 r 006
2015-11-11 20:40:33 C 02 29 53.67 +48 36 24.9 r 006
2015-11-11 20:49:05 C 02 29 52.51 +48 36 20.8 r 006
2015-11-11 21:06:48 C 02 29 50.18 +48 36 12.8 c A24
2015-11-11 21:07:50 C 02 29 50.04 +48 36 12.3 c A24
2015-11-11 22:09:46 C 02 29 42.04 +48 35 44.5 c A24
2015-11-11 22:10:48 C 02 29 41.95 +48 35 43.8 c A24
2015-11-15 12:56:24 C 02 19 20.46 +47 50 49.3 o 300
2015-11-15 13:12:57 C 02 19 18.44 +47 50 39.1 o 300
2015-11-15 13:16:15 C 02 19 18.08 +47 50 37.1 o 300
2015-11-15 13:19:34 C 02 19 17.67 +47 50 35.8 o 300
2015-11-16 17:53:28 C 02 16 06.11 +47 33 40.1 q K73
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)