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
2019-10-26 07:10:08 C 21 38 10.64 +06 07 38.9 V T05
2019-10-26 07:17:36 C 21 38 11.28 +06 07 42.3 V T05
2019-10-26 07:32:38 C 21 38 12.60 +06 07 49.3 V T05
2019-10-26 16:55:10 C 21 39 03.954 +06 12 01.95 V 089
2019-10-26 16:58:35 C 21 39 04.250 +06 12 03.68 V 089
2019-10-26 17:02:01 C 21 39 04.542 +06 12 05.14 V 089
2019-10-26 17:05:27 C 21 39 04.847 +06 12 06.87 V 089
2019-10-26 17:43:33 C 21 39 08.165 +06 12 24.25 V 089
2019-10-26 17:46:59 C 21 39 08.474 +06 12 25.84 V 089
2019-10-26 17:50:25 C 21 39 08.763 +06 12 27.40 V 089
2019-10-26 17:53:51 C 21 39 09.050 +06 12 28.96 V 089
2019-10-26 17:57:18 C 21 39 09.362 +06 12 30.47 V 089
2019-10-26 18:00:44 C 21 39 09.669 +06 12 32.10 V 089
2019-10-26 18:48:40 C 21 39 14.09 +06 12 55.0 q 160
2019-10-26 18:50:58 C 21 39 14.29 +06 12 56.1 q 160
2019-10-26 18:53:51 C 21 39 14.56 +06 12 57.2 q 160
2019-10-27 02:43:23 C 21 39 56.93 +06 16 33.8 V G96
2019-10-27 02:51:29 C 21 39 57.62 +06 16 37.5 V G96
2019-10-27 02:59:34 C 21 39 58.31 +06 16 41.2 V G96
2019-10-27 03:07:40 C 21 39 59.01 +06 16 44.9 V G96
2019-10-28 02:28:12 C 21 42 04.85 +06 27 13.4 V 703
2019-10-28 02:40:37 C 21 42 05.90 +06 27 18.7 V 703
2019-10-28 02:48:57 C 21 42 06.62 +06 27 23.3 V 703
2019-10-28 02:57:15 C 21 42 07.33 +06 27 26.4 V 703
2019-10-28 08:12:39 C 21 42 34.98 +06 29 48.9 V T08
2019-10-28 08:16:42 C 21 42 35.33 +06 29 50.6 V T08
2019-10-28 08:25:53 C 21 42 36.12 +06 29 54.6 V T08
2019-10-28 08:48:49 C 21 42 38.10 +06 30 04.7 V T08
2019-10-30 16:38:12 C 21 47 36.194 +06 54 01.57 V 089
2019-10-30 16:45:04 C 21 47 36.788 +06 54 04.09 V 089
2019-10-30 16:48:30 C 21 47 37.034 +06 54 06.56 V 089
2019-10-30 16:51:56 C 21 47 37.345 +06 54 07.23 V 089
2019-10-30 16:59:08 C 21 47 37.968 +06 54 10.31 V 089
2019-10-30 17:02:35 C 21 47 38.274 +06 54 11.82 V 089
2019-10-30 17:06:01 C 21 47 38.555 +06 54 13.10 V 089
2019-10-30 17:09:27 C 21 47 38.873 +06 54 14.57 V 089
2019-10-30 17:12:53 C 21 47 39.152 +06 54 15.96 V 089
2019-10-31 02:29:20 C 21 48 28.22 +06 58 12.6 V 703
2019-10-31 02:37:34 C 21 48 28.92 +06 58 16.0 V 703
2019-10-31 02:45:48 C 21 48 29.62 +06 58 19.5 V 703
2019-10-31 02:54:03 C 21 48 30.33 +06 58 22.9 V 703
2019-10-31 16:46:55 C 21 49 43.64 +07 04 05.9 V 089
2019-10-31 16:50:22 C 21 49 43.95 +07 04 07.0 V 089
2019-10-31 16:53:49 C 21 49 44.23 +07 04 08.4 V 089
2019-10-31 16:57:15 C 21 49 44.54 +07 04 09.5 V 089
2019-10-31 17:00:41 C 21 49 44.82 +07 04 11.3 V 089
2019-10-31 17:04:07 C 21 49 45.09 +07 04 13.2 V 089
2019-10-31 17:10:59 C 21 49 45.68 +07 04 15.9 V 089
2019-10-31 17:17:51 C 21 49 46.30 +07 04 19.1 V 089
2019-11-01 06:57:09 C 21 50 57.81 +07 10 01.3 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)