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
2019-11-08 21:16:28 S 22 06 42.37 +08 20 33.7 L C51
2019-11-08 21:16:39 S 22 06 42.32 +08 20 33.0 L C51
2019-11-09 00:24:02 C 22 06 58.58 +08 21 36.8 u H21
2019-11-09 00:24:58 S 22 06 58.411 +08 21 42.66 L C51
2019-11-09 00:25:48 C 22 06 58.73 +08 21 37.5 u H21
2019-11-09 00:27:45 C 22 06 58.90 +08 21 37.9 u H21
2019-11-09 00:29:43 C 22 06 59.04 +08 21 38.7 u H21
2019-11-09 00:31:41 C 22 06 59.21 +08 21 39.6 u H21
2019-11-09 00:33:38 C 22 06 59.38 +08 21 40.3 u H21
2019-11-09 00:35:36 C 22 06 59.53 +08 21 40.9 u H21
2019-11-09 00:37:33 C 22 06 59.71 +08 21 41.9 u H21
2019-11-09 00:39:31 C 22 06 59.86 +08 21 42.5 u H21
2019-11-09 00:41:29 C 22 07 00.01 +08 21 43.2 u H21
2019-11-09 00:43:26 C 22 07 00.17 +08 21 43.7 u H21
2019-11-09 00:45:24 C 22 07 00.34 +08 21 44.7 u H21
2019-11-09 00:47:22 C 22 07 00.50 +08 21 45.3 u H21
2019-11-09 00:50:12 C 22 07 00.74 +08 21 46.5 u H21
2019-11-09 00:52:16 C 22 07 00.91 +08 21 47.1 u H21
2019-11-09 03:33:17 S 22 07 14.45 +08 22 52.3 L C51
2019-11-09 05:07:32 S 22 07 22.49 +08 23 26.5 L C51
2019-11-09 06:37:24 C 22 07 30.08 +08 23 58.3 V T08
2019-11-09 06:41:47 S 22 07 30.52 +08 24 01.5 L C51
2019-11-09 06:45:27 C 22 07 30.73 +08 24 01.2 V T08
2019-11-09 06:54:05 C 22 07 31.44 +08 24 04.5 V T08
2019-11-09 07:10:09 C 22 07 32.77 +08 24 10.4 V T08
2019-11-09 08:15:51 S 22 07 38.55 +08 24 35.7 L C51
2019-11-09 09:50:06 S 22 07 46.59 +08 25 10.0 L C51
2019-11-09 11:24:21 S 22 07 54.57 +08 25 45.0 L C51
2019-11-09 12:58:36 S 22 08 02.60 +08 26 19.5 L C51
2019-11-09 14:32:40 S 22 08 10.65 +08 26 53.7 L C51
2019-11-09 16:06:55 S 22 08 18.64 +08 27 28.2 L C51
2019-11-09 17:41:10 S 22 08 26.70 +08 28 02.6 L C51
2019-11-09 18:53:40 C 22 08 32.96 +08 28 22.5 V A16
2019-11-09 19:05:07 C 22 08 33.96 +08 28 27.3 V A16
2019-11-09 19:16:33 C 22 08 34.86 +08 28 31.0 V A16
2019-11-09 19:50:51 C 22 08 37.73 +08 28 43.4 V A16
2019-11-09 20:49:30 S 22 08 42.70 +08 29 11.6 L C51
2019-11-09 23:57:48 S 22 08 58.73 +08 30 20.2 L C51
2019-11-09 23:57:59 S 22 08 58.76 +08 30 20.4 L C51
2019-11-10 03:06:19 S 22 09 14.80 +08 31 29.2 L C51
2019-11-10 06:14:37 S 22 09 30.75 +08 32 37.9 L C51
2019-11-10 07:09:14 C 22 09 35.283 +08 32 55.78 U F51
2019-11-10 07:27:33 C 22 09 36.78 +08 33 02.6 V T08
2019-11-10 07:32:16 C 22 09 37.16 +08 33 04.3 V T08
2019-11-10 07:39:21 C 22 09 37.753 +08 33 06.65 U F51
2019-11-10 07:42:19 C 22 09 37.98 +08 33 08.0 V T08
2019-11-10 08:03:52 C 22 09 39.76 +08 33 15.7 V T08
2019-11-10 09:23:08 S 22 09 46.81 +08 33 45.7 L C51
2019-11-10 12:31:26 S 22 10 02.80 +08 34 54.3 L C51
2019-11-10 22:42:49 C 22 10 55.11 +08 38 30.3 q 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)