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
2019-01-16 07:54:21 C 06 29 53.965 +49 27 17.10 U F52
2019-01-16 08:13:54 C 06 29 51.131 +49 27 07.91 U F52
2019-01-16 08:33:17 C 06 29 48.316 +49 26 58.69 U F52
2019-01-16 08:52:45 C 06 29 45.486 +49 26 49.32 U F52
2019-01-17 10:04:37 C 06 26 16.58 +49 14 04.2 V T05
2019-01-17 10:16:29 C 06 26 14.88 +49 13 57.8 V T05
2019-01-17 10:30:32 C 06 26 12.89 +49 13 50.2 V T05
2019-01-17 10:46:00 C 06 26 10.70 +49 13 41.7 V T05
2019-01-19 10:02:49 C 06 19 53.32 +48 47 08.8 V T08
2019-01-19 10:10:47 C 06 19 52.22 +48 47 04.1 V T08
2019-01-19 10:23:42 C 06 19 50.50 +48 46 56.2 V T08
2019-01-19 10:40:31 C 06 19 48.22 +48 46 45.6 V T08
2019-01-23 09:50:08 C 06 08 10.90 +47 44 06.1 V T08
2019-01-23 10:00:05 C 06 08 09.71 +47 43 58.7 V T08
2019-01-23 10:13:54 C 06 08 08.05 +47 43 48.6 V T08
2019-01-23 10:30:30 C 06 08 06.05 +47 43 36.3 V T08
2019-01-23 14:56:13 C 06 07 36.40 +47 40 23.6 q D29
2019-01-23 15:00:02 C 06 07 35.86 +47 40 20.7 q D29
2019-01-23 15:16:35 C 06 07 33.90 +47 40 08.7 q D29
2019-01-23 15:20:24 C 06 07 33.45 +47 40 06.0 q D29
2019-01-23 15:36:57 C 06 07 31.49 +47 39 53.7 q D29
2019-01-23 15:40:46 C 06 07 31.04 +47 39 50.9 q D29
2019-01-24 06:56:33 C 06 05 48.74 +47 28 42.1 I41
2019-01-24 06:57:53 C 06 05 48.59 +47 28 41.1 I41
2019-01-25 05:03:46 C 06 03 25.30 +47 12 08.6 V G96
2019-01-25 05:12:06 C 06 03 24.38 +47 12 02.3 V G96
2019-01-25 05:20:37 C 06 03 23.43 +47 11 55.8 V G96
2019-01-25 05:28:48 C 06 03 22.51 +47 11 49.5 V G96
2019-01-25 06:28:11 C 06 03 16.00 +47 11 03.6 I41
2019-01-25 06:29:30 C 06 03 15.85 +47 11 02.7 I41
2019-01-25 09:38:01 C 06 02 55.72 +47 08 41.6 V T05
2019-01-25 09:48:38 C 06 02 54.54 +47 08 33.2 V T05
2019-01-25 10:02:18 C 06 02 53.04 +47 08 22.6 V T05
2019-01-25 10:19:33 C 06 02 51.13 +47 08 09.0 V T05
2019-01-25 22:20:40 C 06 01 36.26 +46 58 48.8 17.3 U K83
2019-01-25 22:30:25 C 06 01 35.22 +46 58 41.1 16.8 U K83
2019-01-25 22:35:16 C 06 01 34.71 +46 58 37.3 16.8 U K83
2019-01-27 09:16:26 C 05 58 06.87 +46 31 16.5 V T08
2019-01-27 09:32:10 C 05 58 05.28 +46 31 03.5 V T08
2019-01-27 09:44:46 C 05 58 03.98 +46 30 53.1 V T08
2019-01-28 21:13:09 C 05 54 46.48 +46 01 44.7 d B66
2019-01-28 22:15:00 C 05 54 40.66 +46 00 52.8 d B66
2019-01-29 13:17:34 C 05 53 21.63 +45 48 16.7 o D54
2019-01-29 13:19:18 C 05 53 21.40 +45 48 14.2 o D54
2019-01-29 13:20:58 C 05 53 21.24 +45 48 13.0 o D54
2019-01-29 14:01:48 C 05 53 17.64 +45 47 38.9 o D54
2019-01-29 14:03:31 C 05 53 17.40 +45 47 38.2 o D54
2019-01-29 14:05:11 C 05 53 17.34 +45 47 36.3 o D54
2019-01-31 09:11:45 C 05 49 44.67 +45 10 52.9 V T08
2019-01-31 09:23:42 C 05 49 43.69 +45 10 42.3 V T08
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)