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
2011-11-03 09:45:39 C 07 18 06.94 +45 02 54.8 r 703
2011-11-03 09:53:01 C 07 18 07.09 +45 02 58.4 r 703
2011-12-05 22:44:51 C 06 53 45.68 +51 45 37.8 d B66
2011-12-05 23:53:13 C 06 53 38.79 +51 46 08.0 d B66
2011-12-08 09:21:27 C 06 47 44.810 +52 09 24.27 L F51
2011-12-08 09:33:47 C 06 47 43.428 +52 09 29.27 L F51
2011-12-09 13:26:55 C 06 44 37.709 +52 19 40.09 L F51
2011-12-09 13:38:17 C 06 44 36.371 +52 19 43.89 L F51
2011-12-15 11:10:02 C 06 27 07.321 +52 57 32.81 L F51
2011-12-15 11:27:28 C 06 27 04.903 +52 57 35.88 L F51
2011-12-15 11:51:12 C 06 27 01.605 +52 57 39.94 L F51
2011-12-15 12:12:20 C 06 26 58.666 +52 57 43.45 L F51
2011-12-18 00:37:58 C 06 18 42.73 +53 05 26.7 d B66
2011-12-18 01:17:17 C 06 18 37.08 +53 05 29.9 d B66
2011-12-25 11:34:44 C 05 52 52.22 +52 53 59.4 r D29
2011-12-25 11:36:10 C 05 52 52.03 +52 53 58.9 r D29
2011-12-25 11:52:00 C 05 52 49.70 +52 53 56.2 r D29
2011-12-25 11:53:26 C 05 52 49.49 +52 53 56.0 r D29
2011-12-25 11:57:45 C 05 52 48.83 +52 53 55.1 r D29
2011-12-25 11:59:11 C 05 52 48.61 +52 53 54.5 r D29
2011-12-25 12:15:02 C 05 52 46.26 +52 53 51.8 r D29
2011-12-25 12:16:28 C 05 52 46.10 +52 53 51.8 r D29
2011-12-25 12:20:46 C 05 52 45.40 +52 53 50.6 r D29
2011-12-25 12:22:13 C 05 52 45.15 +52 53 50.2 r D29
2011-12-25 12:38:02 C 05 52 42.97 +52 53 47.6 r D29
2011-12-25 12:39:29 C 05 52 42.74 +52 53 47.5 r D29
2011-12-26 01:37:49 C 05 50 47.70 +52 50 48.1 d B66
2011-12-26 02:37:31 C 05 50 38.89 +52 50 32.7 d B66
2011-12-28 00:33:36 C 05 44 01.27 +52 37 45.6 d B66
2011-12-28 02:08:52 C 05 43 47.35 +52 37 13.3 d B66
2011-12-29 21:10:14 C 05 37 43.45 +52 21 57.3 o J16
2011-12-29 21:19:59 C 05 37 42.08 +52 21 53.9 o J16
2011-12-29 21:30:06 C 05 37 40.62 +52 21 49.9 o J16
2011-12-29 21:40:08 C 05 37 39.20 +52 21 46.0 o J16
2011-12-30 21:12:05 C 05 34 23.36 +52 12 10.8 u 557
2011-12-30 22:15:35 C 05 34 14.40 +52 11 43.9 u 557
2011-12-31 01:51:38 C 05 33 44.12 +52 10 07.7 u 557
2011-12-31 02:37:35 C 05 33 37.74 +52 09 46.5 u 557
2012-01-01 20:24:31 C 05 28 01.90 +51 50 21.4 o J16
2012-01-01 20:38:36 C 05 28 00.00 +51 50 14.7 o J16
2012-01-01 20:50:39 C 05 27 58.40 +51 50 08.7 o J16
2012-01-03 20:16:08 C 05 21 51.97 +51 25 06.3 c J19
2012-01-03 20:22:30 C 05 21 51.13 +51 25 02.5 c J19
2012-01-03 20:28:53 C 05 21 50.31 +51 24 59.1 c J19
2012-01-03 20:35:15 C 05 21 49.49 +51 24 55.6 c J19
2012-01-03 21:00:44 C 05 21 46.20 +51 24 41.5 c J19
2012-01-03 21:19:50 C 05 21 43.71 +51 24 31.1 c J19
2012-01-03 21:26:13 C 05 21 42.88 +51 24 27.6 c J19
2012-01-04 00:05:04 C 05 21 23.45 +51 22 55.9 u I15
2012-01-04 00:10:42 C 05 21 22.72 +51 22 52.8 u I15
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)