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
2019-11-01 07:01:48 C 21 50 58.20 +07 10 03.1 V T08
2019-11-01 07:10:31 C 21 50 58.93 +07 10 06.7 V T08
2019-11-01 07:30:33 C 21 51 00.61 +07 10 14.8 V T08
2019-11-02 08:17:29 S 21 53 10.79 +07 20 19.0 L C51
2019-11-02 08:17:39 S 21 53 10.79 +07 20 18.7 L C51
2019-11-02 11:25:59 S 21 53 27.21 +07 21 34.3 L C51
2019-11-02 14:34:18 S 21 53 43.59 +07 22 49.8 L C51
2019-11-02 17:42:48 S 21 54 00.02 +07 24 04.7 L C51
2019-11-02 20:51:06 S 21 54 16.37 +07 25 19.9 L C51
2019-11-02 23:59:37 S 21 54 32.77 +07 26 35.0 L C51
2019-11-03 03:07:56 S 21 54 49.15 +07 27 50.0 L C51
2019-11-03 04:41:27 S 21 54 57.26 +07 28 27.8 L C51
2019-11-03 06:16:15 S 21 55 05.51 +07 29 04.6 L C51
2019-11-03 06:26:24 C 21 55 06.36 +07 29 07.1 V T05
2019-11-03 06:32:07 C 21 55 06.84 +07 29 09.3 V T05
2019-11-03 06:42:14 C 21 55 07.68 +07 29 13.3 V T05
2019-11-03 07:01:34 C 21 55 09.29 +07 29 20.9 V T05
2019-11-03 07:50:30 S 21 55 13.71 +07 29 41.9 L C51
2019-11-03 09:24:45 S 21 55 21.87 +07 30 19.0 L C51
2019-11-03 10:59:00 S 21 55 30.06 +07 30 56.2 L C51
2019-11-03 12:33:04 S 21 55 38.24 +07 31 33.6 L C51
2019-11-03 15:41:34 S 21 55 54.57 +07 32 47.7 L C51
2019-11-03 17:15:38 S 21 56 02.72 +07 33 25.7 L C51
2019-11-03 18:49:53 S 21 56 10.891 +07 34 01.56 L C51
2019-11-03 20:24:08 S 21 56 19.07 +07 34 39.1 L C51
2019-11-03 23:32:28 S 21 56 35.39 +07 35 52.6 L C51
2019-11-04 02:40:57 S 21 56 51.71 +07 37 06.1 L C51
2019-11-04 05:49:17 S 21 57 07.99 +07 38 20.0 L C51
2019-11-04 08:57:46 S 21 57 24.31 +07 39 32.6 L C51
2019-11-04 12:06:05 S 21 57 40.62 +07 40 46.7 L C51
2019-11-04 15:14:24 S 21 57 56.86 +07 41 59.6 L C51
2019-11-05 07:30:55 C 21 59 20.88 +07 48 15.8 V T08
2019-11-05 07:35:02 C 21 59 21.22 +07 48 17.4 V T08
2019-11-05 07:42:26 C 21 59 21.84 +07 48 20.0 V T08
2019-11-05 07:56:44 C 21 59 23.03 +07 48 25.5 V T08
2019-11-08 02:30:59 C 22 05 06.10 +08 13 30.7 u H21
2019-11-08 02:33:03 C 22 05 06.28 +08 13 31.5 u H21
2019-11-08 02:35:07 C 22 05 06.46 +08 13 32.3 u H21
2019-11-08 02:37:11 C 22 05 06.63 +08 13 33.1 u H21
2019-11-08 02:39:15 C 22 05 06.81 +08 13 33.7 u H21
2019-11-08 02:41:20 C 22 05 06.96 +08 13 34.8 u H21
2019-11-08 02:43:24 C 22 05 07.13 +08 13 35.4 u H21
2019-11-08 02:45:28 C 22 05 07.30 +08 13 36.2 u H21
2019-11-08 02:47:32 C 22 05 07.48 +08 13 37.0 u H21
2019-11-08 02:49:36 C 22 05 07.66 +08 13 37.8 u H21
2019-11-08 02:51:41 C 22 05 07.82 +08 13 38.6 u H21
2019-11-08 08:43:01 S 22 05 38.02 +08 15 54.5 L C51
2019-11-08 11:51:20 S 22 05 54.14 +08 17 04.9 L C51
2019-11-08 14:59:50 S 22 06 10.34 +08 18 11.9 L C51
2019-11-08 18:08:09 S 22 06 26.25 +08 19 24.3 L C51
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)