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
2015-08-13 03:13:45 C 03 33 22.19 +28 06 28.1 t 160
2015-08-25 16:00:03 S 03 51 54.79 +32 19 25.6 L C51
2015-08-25 19:09:06 S 03 52 05.12 +32 22 01.6 L C51
2015-08-25 22:17:58 S 03 52 15.38 +32 24 37.5 L C51
2015-08-26 01:26:50 S 03 52 25.66 +32 27 11.9 L C51
2015-08-26 02:04:46 C 03 52 28.38 +32 27 42.0 q 160
2015-08-26 02:07:36 C 03 52 28.52 +32 27 44.3 q 160
2015-08-26 02:10:25 C 03 52 28.67 +32 27 46.7 q 160
2015-08-26 04:35:43 S 03 52 35.90 +32 29 48.3 L C51
2015-08-26 06:10:09 S 03 52 41.01 +32 31 06.0 L C51
2015-08-26 06:10:19 S 03 52 41.07 +32 31 06.0 L C51
2015-08-26 07:44:45 S 03 52 46.12 +32 32 24.2 L C51
2015-08-26 09:19:11 S 03 52 51.16 +32 33 42.5 L C51
2015-08-26 10:53:37 S 03 52 56.28 +32 34 59.6 L C51
2015-08-26 14:02:30 S 03 53 06.35 +32 37 35.3 L C51
2015-08-26 18:45:48 S 03 53 21.59 +32 41 28.7 L C51
2015-08-26 21:54:50 S 03 53 31.64 +32 44 04.2 L C51
2015-08-27 04:12:35 S 03 53 51.65 +32 49 14.2 L C51
2015-08-30 01:06:26 C 03 57 22.84 +33 45 39.6 q 160
2015-08-30 01:08:40 C 03 57 22.95 +33 45 41.6 q 160
2015-08-30 01:10:54 C 03 57 23.05 +33 45 43.4 q 160
2015-08-31 01:29:46 C 03 58 33.36 +34 05 35.4 q 160
2015-08-31 01:32:35 C 03 58 33.49 +34 05 37.7 q 160
2015-08-31 01:35:22 C 03 58 33.62 +34 05 40.0 q 160
2015-09-02 09:00:35 C 04 01 05.58 +34 50 51.4 u H21
2015-09-02 09:03:14 C 04 01 05.70 +34 50 53.8 u H21
2015-09-02 09:05:46 C 04 01 05.80 +34 50 55.8 u H21
2015-09-02 09:08:18 C 04 01 05.91 +34 50 57.9 u H21
2015-09-02 09:10:50 C 04 01 06.01 +34 51 00.1 u H21
2015-09-02 09:13:21 C 04 01 06.12 +34 51 02.0 u H21
2015-09-02 09:15:53 C 04 01 06.23 +34 51 04.2 u H21
2015-09-02 09:18:25 C 04 01 06.34 +34 51 06.2 u H21
2015-09-02 09:20:57 C 04 01 06.44 +34 51 08.3 u H21
2015-09-02 09:23:29 C 04 01 06.55 +34 51 10.4 u H21
2015-09-02 09:26:00 C 04 01 06.66 +34 51 12.5 u H21
2015-09-02 09:28:32 C 04 01 06.76 +34 51 14.6 u H21
2015-09-02 09:31:15 C 04 01 06.87 +34 51 16.8 u H21
2015-09-02 09:33:58 C 04 01 06.98 +34 51 18.9 u H21
2015-09-02 09:36:29 C 04 01 07.08 +34 51 21.2 u H21
2015-09-02 09:39:22 C 04 01 07.20 +34 51 23.4 u H21
2015-09-03 09:23:08 C 04 02 08.62 +35 10 40.9 u H21
2015-09-03 09:35:28 C 04 02 09.11 +35 10 51.2 u H21
2015-09-03 09:38:00 C 04 02 09.21 +35 10 53.5 u H21
2015-09-19 02:17:36 C 04 12 16.04 +40 14 38.5 c A24
2015-09-19 02:18:37 C 04 12 16.09 +40 14 39.9 c A24
2015-09-19 03:19:39 C 04 12 16.36 +40 15 27.8 c A24
2015-09-19 03:20:41 C 04 12 16.37 +40 15 28.4 c A24
2015-09-21 02:44:01 C 04 12 33.12 +40 53 11.5 c A24
2015-09-21 02:45:04 C 04 12 33.12 +40 53 12.3 c A24
2015-09-21 03:47:25 C 04 12 33.14 +40 54 02.1 c A24
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)