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
2023-01-14 06:42:45 C 02 35 25.721 +38 07 56.60 V T05
2023-01-14 06:50:41 C 02 35 25.944 +38 07 52.39 V T05
2023-01-14 07:23:22 C 02 35 26.878 +38 07 35.65 V T05
2023-01-15 11:12:20 C 02 36 21.85 +37 53 43.5 V D29
2023-01-15 11:32:42 C 02 36 22.49 +37 53 33.1 V D29
2023-01-15 11:53:04 C 02 36 23.13 +37 53 23.4 V D29
2023-01-17 03:43:16 S 02 37 47.96 +37 34 15.5 L C51
2023-01-17 06:50:40 S 02 37 54.98 +37 32 46.4 L C51
2023-01-17 09:58:14 S 02 38 01.88 +37 31 19.3 L C51
2023-01-17 13:05:50 S 02 38 08.96 +37 29 52.4 L C51
2023-01-17 20:54:31 S 02 38 26.74 +37 26 16.4 L C51
2023-01-19 08:24:39 C 02 39 50.575 +37 10 16.36 V T05
2023-01-19 08:29:52 C 02 39 50.762 +37 10 14.05 V T05
2023-01-19 08:41:07 C 02 39 51.209 +37 10 08.72 V T05
2023-01-19 08:58:52 C 02 39 51.907 +37 10 00.66 V T05
2023-01-22 06:04:05 C 02 42 51.751 +36 40 43.36 V T05
2023-01-22 06:08:38 C 02 42 51.970 +36 40 41.45 V T05
2023-01-22 06:22:51 C 02 42 52.574 +36 40 35.62 V T05
2023-01-22 06:30:40 C 02 42 52.927 +36 40 32.16 V T05
2023-01-23 06:15:41 C 02 43 59.165 +36 31 00.62 V T05
2023-01-23 06:20:17 C 02 43 59.354 +36 30 58.90 V T05
2023-01-23 06:28:06 C 02 43 59.714 +36 30 55.58 V T05
2023-01-23 06:43:15 C 02 44 00.403 +36 30 49.43 V T05
2023-01-25 04:23:14 C 02 46 13.796 +36 13 14.02 V 703
2023-01-25 04:30:48 C 02 46 14.156 +36 13 10.85 V 703
2023-01-25 04:38:22 C 02 46 14.570 +36 13 07.61 V 703
2023-01-25 04:45:56 C 02 46 14.956 +36 13 05.34 V 703
2023-01-27 03:00:15 C 02 48 38.095 +35 56 18.49 V 703
2023-01-27 03:08:56 C 02 48 38.560 +35 56 15.40 V 703
2023-01-27 03:17:40 C 02 48 39.028 +35 56 12.16 V 703
2023-01-27 03:26:27 C 02 48 39.481 +35 56 09.24 V 703
2023-02-02 03:51:34 C 02 56 52.739 +35 09 37.15 V G96
2023-02-02 03:59:23 C 02 56 53.200 +35 09 34.78 V G96
2023-02-02 04:07:12 C 02 56 53.657 +35 09 32.36 V G96
2023-02-02 04:08:20 C 02 56 53.747 +35 09 31.97 V 703
2023-02-02 04:15:02 C 02 56 54.128 +35 09 30.06 V G96
2023-02-02 04:17:53 C 02 56 54.319 +35 09 29.70 V 703
2023-02-02 04:27:27 C 02 56 54.870 +35 09 26.17 V 703
2023-02-02 04:37:01 C 02 56 55.432 +35 09 23.26 V 703
2023-02-07 20:42:42 C 03 05 37.81 +34 32 42.5 X K19
2023-02-07 20:48:00 C 03 05 38.17 +34 32 41.6 X K19
2023-02-07 20:53:18 C 03 05 38.52 +34 32 40.1 X K19
2023-02-09 05:12:52 C 03 07 49.883 +34 24 52.60 V 703
2023-02-09 05:20:34 C 03 07 50.329 +34 24 50.18 V 703
2023-02-09 05:28:15 C 03 07 50.833 +34 24 47.56 V 703
2023-02-09 05:35:57 C 03 07 51.438 +34 24 44.82 V 703
2023-02-13 02:37:48 C 03 14 24.587 +34 03 58.50 V G96
2023-02-13 02:45:16 C 03 14 25.109 +34 03 56.92 V G96
2023-02-13 02:52:46 C 03 14 25.638 +34 03 55.26 V G96
2023-02-13 03:00:18 C 03 14 26.174 +34 03 53.68 V G96
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)