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
2019-03-09 01:15:57 C 05 43 10.10 +32 45 40.8 q W61
2019-03-09 01:54:58 C 05 43 11.72 +32 45 11.5 q W61
2019-03-12 05:31:31 C 05 46 45.01 +31 50 17.1 q U70
2019-03-12 06:15:19 C 05 46 47.11 +31 49 44.9 q U70
2019-03-15 07:02:17 C 05 50 36.36 +30 58 08.9 V T08
2019-03-15 07:23:03 C 05 50 37.43 +30 57 53.7 V T08
2019-03-15 07:29:19 C 05 50 37.76 +30 57 49.5 V T08
2019-03-19 07:12:49 C 05 56 10.56 +29 51 17.1 V T08
2019-03-19 07:21:31 C 05 56 11.05 +29 51 11.1 V T08
2019-03-19 07:29:30 C 05 56 11.53 +29 51 05.4 V T08
2019-03-19 07:37:30 C 05 56 12.01 +29 50 59.7 V T08
2019-03-22 19:59:41 C 06 01 31.86 +28 53 18.2 q 160
2019-03-22 20:02:41 C 06 01 31.99 +28 53 15.4 q 160
2019-03-22 20:05:26 C 06 01 32.21 +28 53 13.9 q 160
2019-03-23 05:56:14 C 06 02 11.02 +28 46 37.4 V T08
2019-03-23 06:03:43 C 06 02 11.50 +28 46 32.4 V T08
2019-03-23 06:14:54 C 06 02 12.21 +28 46 24.4 V T08
2019-03-23 06:25:04 C 06 02 12.85 +28 46 17.6 V T08
2019-03-23 20:07:44 C 06 03 07.27 +28 36 55.7 q 160
2019-03-23 20:10:32 C 06 03 07.58 +28 36 53.2 q 160
2019-03-23 20:13:21 C 06 03 07.75 +28 36 51.4 q 160
2019-03-25 04:07:29 C 06 05 16.74 +28 15 18.9 q U70
2019-03-25 04:49:43 C 06 05 19.52 +28 14 50.0 q U70
2019-03-27 06:18:07 C 06 08 45.53 +27 41 33.4 V T08
2019-03-27 06:29:13 C 06 08 46.27 +27 41 25.8 V T08
2019-03-27 06:38:52 C 06 08 46.94 +27 41 19.3 V T08
2019-03-27 06:48:31 C 06 08 47.59 +27 41 12.4 V T08
2019-03-28 18:54:31 C 06 11 22.46 +27 16 51.4 q L05
2019-03-28 19:11:40 C 06 11 23.66 +27 16 39.7 q L05
2019-03-29 18:48:19 C 06 13 06.60 +27 00 48.7 a 233
2019-03-29 18:53:21 C 06 13 06.98 +27 00 45.4 a 233
2019-03-29 19:13:45 C 06 13 08.40 +27 00 31.8 a 233
2019-03-29 19:19:58 C 06 13 08.83 +27 00 26.4 a 233
2019-03-29 19:26:11 C 06 13 09.31 +27 00 23.2 a 233
2019-03-29 19:29:47 C 06 13 09.53 +27 00 20.3 q 160
2019-03-29 19:32:40 C 06 13 09.77 +27 00 18.4 q 160
2019-03-29 19:35:32 C 06 13 09.98 +27 00 16.4 q 160
2019-03-31 06:09:40 C 06 15 43.34 +26 37 07.2 V T08
2019-03-31 06:21:38 C 06 15 44.21 +26 36 58.9 V T08
2019-03-31 06:31:25 C 06 15 44.92 +26 36 52.2 V T08
2019-04-08 05:34:06 C 06 30 43.20 +24 27 36.7 V T08
2019-04-08 05:35:28 C 06 30 43.32 +24 27 36.0 V T08
2019-04-08 06:00:15 C 06 30 45.25 +24 27 18.7 V T08
2019-04-08 06:05:43 C 06 30 45.69 +24 27 15.1 V T08
2019-04-10 05:58:55 C 06 34 42.75 +23 54 22.3 V T05
2019-04-10 06:15:42 C 06 34 44.11 +23 54 10.5 V T05
2019-04-10 06:22:55 C 06 34 44.71 +23 54 05.5 V T05
2019-04-10 06:27:49 C 06 34 45.11 +23 54 01.9 V T05
2019-04-10 06:34:56 C 06 34 45.66 +23 53 57.0 V T05
2019-04-10 06:39:42 C 06 34 46.08 +23 53 53.5 V T05
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)