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
2026-01-12 16:05:00 C 08 41 34.201 +44 47 09.55 W Q21
2026-01-12 16:35:34 C 08 41 31.267 +44 47 16.28 W O18
2026-01-12 17:16:56 C 08 41 25.990 +44 47 28.92 W O18
2026-01-13 01:06:53 B 08 40 27.780 +44 49 45.01 X J51
2026-01-13 01:17:37 B 08 40 26.376 +44 49 48.14 X J51
2026-01-13 01:28:24 B 08 40 24.972 +44 49 51.35 X J51
2026-01-14 06:40:17 C 08 36 42.790 +44 57 24.62 V 703
2026-01-14 06:43:35 C 08 36 42.343 +44 57 25.45 V 703
2026-01-14 06:46:53 C 08 36 41.897 +44 57 26.35 V 703
2026-01-14 06:50:14 C 08 36 41.440 +44 57 27.18 V 703
2026-01-15 11:42:43 C 08 32 52.157 +45 03 56.99 V T08
2026-01-15 11:47:19 C 08 32 51.514 +45 03 57.82 V T08
2026-01-15 12:37:50 C 08 32 44.405 +45 04 07.54 V T08
2026-01-15 13:18:28 C 08 32 38.702 +45 04 14.88 V T08
2026-01-15 15:38:35 C 08 32 21.454 +45 04 36.23 W O18
2026-01-15 16:46:06 C 08 32 12.027 +45 04 51.23 W O18
2026-01-16 04:00:48 C 08 30 40.98 +45 06 51.1 V U55
2026-01-16 04:08:04 C 08 30 39.81 +45 06 50.7 V U55
2026-01-16 04:15:21 C 08 30 38.66 +45 06 53.1 V U55
2026-01-16 12:36:51 C 08 29 28.224 +45 08 32.82 V T08
2026-01-16 12:49:23 C 08 29 26.422 +45 08 34.62 V T08
2026-01-16 13:12:40 C 08 29 23.062 +45 08 38.00 V T08
2026-01-16 13:32:15 C 08 29 20.258 +45 08 40.67 V T08
2026-01-17 21:50:08 C 08 24 49.330 +45 13 05.12 Z C23
2026-01-17 22:47:00 C 08 24 40.951 +45 13 12.54 Z C23
2026-01-18 11:17:34 C 08 22 52.567 +45 14 39.66 V T05
2026-01-18 11:22:08 C 08 22 51.881 +45 14 40.16 V T05
2026-01-18 12:13:15 C 08 22 44.158 +45 14 44.30 V T05
2026-01-18 12:22:31 C 08 22 42.758 +45 14 44.99 V T05
2026-01-18 20:16:16 C 08 21 35.405 +45 15 13.72 Z C23
2026-01-18 20:51:48 C 08 21 30.122 +45 15 17.64 Z C23
2026-01-18 22:45:40 C 08 21 13.097 +45 15 28.22 Z C23
2026-01-19 06:31:09 C 08 20 05.053 +45 16 05.12 V 703
2026-01-19 06:34:28 C 08 20 04.546 +45 16 05.30 V 703
2026-01-19 06:37:49 C 08 20 04.042 +45 16 05.59 V 703
2026-01-19 06:41:09 C 08 20 03.534 +45 16 05.92 V 703
2026-01-19 09:57:09 C 08 19 34.661 +45 16 21.25 V T08
2026-01-19 10:01:06 C 08 19 34.013 +45 16 21.50 V T08
2026-01-19 10:05:03 C 08 19 33.434 +45 16 21.61 V T08
2026-01-19 10:14:17 C 08 19 32.002 +45 16 22.22 V T08
2026-01-19 23:32:04 B 08 17 33.749 +45 16 46.88 V L65
2026-01-19 23:36:12 B 08 17 33.110 +45 16 46.96 V L65
2026-01-19 23:40:21 B 08 17 32.465 +45 16 47.06 V L65
2026-01-20 02:56:06 B 08 17 03.946 +45 17 07.15 Z X33
2026-01-20 02:59:11 B 08 17 03.389 +45 17 07.62 Z X33
2026-01-20 03:02:14 B 08 17 02.854 +45 17 07.22 Z X33
2026-01-20 07:05:53 C 08 16 26.213 +45 17 04.38 V G96
2026-01-20 07:13:28 C 08 16 25.043 +45 17 04.42 V G96
2026-01-20 07:21:05 C 08 16 23.851 +45 17 04.56 V G96
2026-01-20 07:28:43 C 08 16 22.667 +45 17 04.78 V G96
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)