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
2025-12-12 11:44:10 C 09 21 59.796 +39 31 55.66 X F51
2025-12-12 12:01:37 C 09 21 59.817 +39 32 02.30 X F51
2025-12-12 12:19:04 C 09 21 59.838 +39 32 08.90 X F51
2025-12-12 12:36:49 C 09 21 59.855 +39 32 15.63 X F51
2025-12-13 10:04:35 C 09 22 04.320 +39 40 07.82 V T05
2025-12-13 10:53:18 C 09 22 04.298 +39 40 27.16 V T05
2025-12-13 11:17:11 C 09 22 04.272 +39 40 36.70 V T05
2025-12-13 11:20:27 C 09 22 04.265 +39 40 37.88 V T05
2025-12-14 13:08:31 C 09 22 04.049 +39 50 26.70 V T08
2025-12-14 13:11:08 C 09 22 04.037 +39 50 27.74 V T08
2025-12-14 13:15:05 C 09 22 04.020 +39 50 29.36 V T08
2025-12-14 13:29:43 C 09 22 03.926 +39 50 35.02 V T08
2025-12-14 18:53:50 C 09 22 03.36 +39 52 37.1 V D29
2025-12-14 19:14:11 C 09 22 03.24 +39 52 45.1 V D29
2025-12-14 19:34:33 C 09 22 03.12 +39 52 53.1 V D29
2025-12-18 08:50:35 C 09 21 23.022 +40 27 13.64 V G96
2025-12-18 08:58:03 C 09 21 22.900 +40 27 16.96 V G96
2025-12-18 09:05:29 C 09 21 22.770 +40 27 20.16 V G96
2025-12-18 09:12:56 C 09 21 22.640 +40 27 23.29 V G96
2025-12-22 12:17:50 C 09 19 17.549 +41 10 27.88 V T08
2025-12-22 12:20:28 C 09 19 17.462 +41 10 29.14 V T08
2025-12-22 12:25:09 C 09 19 17.302 +41 10 31.33 V T08
2025-12-22 12:33:48 C 09 19 17.033 +41 10 35.18 V T08
2025-12-24 23:53:56 B 09 17 17.97 +41 37 29.0 X L76
2025-12-24 23:59:47 B 09 17 17.72 +41 37 31.7 X L76
2025-12-25 00:05:38 B 09 17 17.48 +41 37 34.4 X L76
2025-12-25 00:11:29 B 09 17 17.23 +41 37 37.2 X L76
2025-12-25 00:17:19 B 09 17 16.99 +41 37 39.8 X L76
2025-12-25 00:23:09 B 09 17 16.75 +41 37 42.5 X L76
2025-12-25 12:06:04 C 09 16 49.486 +41 43 12.40 V T05
2025-12-25 12:11:22 C 09 16 49.246 +41 43 14.95 V T05
2025-12-25 12:18:44 C 09 16 48.912 +41 43 18.41 V T05
2025-12-25 12:26:35 C 09 16 48.566 +41 43 22.04 V T05
2025-12-25 21:12:11 C 09 16 27.40 +41 47 15.3 Y 557
2025-12-25 22:13:02 C 09 16 24.77 +41 47 44.9 Y 557
2025-12-25 23:10:57 C 09 16 22.21 +41 48 12.8 Y 557
2025-12-25 23:31:03 B 09 16 21.300 +41 48 21.42 V L65
2025-12-25 23:35:11 B 09 16 21.125 +41 48 23.47 V L65
2025-12-25 23:39:19 B 09 16 20.940 +41 48 25.45 V L65
2025-12-26 00:11:53 C 09 16 19.46 +41 48 42.0 Y 557
2025-12-26 01:12:51 C 09 16 16.69 +41 49 10.7 Y 557
2025-12-26 02:13:49 C 09 16 13.88 +41 49 39.1 Y 557
2025-12-26 03:14:47 C 09 16 11.07 +41 50 07.1 Y 557
2025-12-26 04:12:40 C 09 16 08.42 +41 50 33.4 Y 557
2025-12-26 05:13:38 C 09 16 05.64 +41 51 00.7 Y 557
2025-12-26 12:15:23 C 09 15 48.005 +41 54 25.56 V T08
2025-12-26 12:19:26 C 09 15 47.822 +41 54 27.47 V T08
2025-12-26 12:26:47 C 09 15 47.448 +41 54 31.00 V T08
2025-12-26 12:44:40 C 09 15 46.570 +41 54 39.38 V T08
2025-12-26 17:09:07 C 09 15 35.267 +41 56 35.65 W O18
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)