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
2004-12-13 22:08:25 C 04 44 21.55 +53 07 11.0 o 160
2004-12-13 22:09:00 C 04 44 21.49 +53 07 11.2 o 160
2004-12-13 22:10:08 C 04 44 21.30 +53 07 10.5 o 160
2004-12-13 22:10:43 C 04 44 21.20 +53 07 09.8 o 160
2004-12-13 22:11:18 C 04 44 21.18 +53 07 10.0 o 160
2004-12-13 22:11:51 C 04 44 21.06 +53 07 09.7 o 160
2004-12-13 22:12:26 C 04 44 21.00 +53 07 09.9 o 160
2004-12-13 22:12:59 C 04 44 20.92 +53 07 09.2 o 160
2004-12-13 22:13:35 C 04 44 20.83 +53 07 09.2 o 160
2004-12-13 22:14:08 C 04 44 20.75 +53 07 08.9 o 160
2004-12-13 22:15:16 C 04 44 20.58 +53 07 08.6 o 160
2004-12-13 22:15:51 C 04 44 20.52 +53 07 08.3 o 160
2004-12-13 22:16:26 C 04 44 20.42 +53 07 08.1 o 160
2004-12-13 22:16:59 C 04 44 20.35 +53 07 07.7 o 160
2004-12-13 22:17:34 C 04 44 20.28 +53 07 08.0 o 160
2004-12-13 22:18:09 C 04 44 20.19 +53 07 07.2 o 160
2004-12-13 22:18:42 C 04 44 20.11 +53 07 07.4 o 160
2004-12-13 22:19:52 C 04 44 19.97 +53 07 06.9 o 160
2004-12-13 22:20:25 C 04 44 19.84 +53 07 06.8 o 160
2004-12-13 22:21:00 C 04 44 19.77 +53 07 06.6 o 160
2004-12-13 22:22:07 C 04 44 19.62 +53 07 06.1 o 160
2004-12-14 18:20:38 C 04 41 37.14 +52 59 19.4 c 127
2004-12-14 18:25:43 C 04 41 36.46 +52 59 17.6 c 127
2004-12-14 18:35:53 C 04 41 35.04 +52 59 13.6 c 127
2004-12-16 08:10:12 C 04 36 32.80 +52 43 15.1 c 704
2004-12-16 08:28:57 C 04 36 30.29 +52 43 05.9 c 704
2004-12-16 08:47:43 C 04 36 27.73 +52 42 56.9 c 704
2004-12-16 09:06:27 C 04 36 24.99 +52 42 49.2 c 704
2004-12-16 09:25:13 C 04 36 22.69 +52 42 39.2 c 704
2004-12-17 23:52:58 C 04 31 25.51 +52 24 06.7 o 493
2004-12-18 00:58:19 C 04 31 17.03 +52 23 32.9 o 493
2004-12-18 02:10:41 C 04 31 07.69 +52 22 55.2 o 493
2004-12-19 06:08:40 C 04 27 38.51 +52 08 05.4 r H41
2004-12-19 06:21:27 C 04 27 36.84 +52 07 58.2 r H41
2004-12-19 06:23:29 C 04 27 36.56 +52 07 57.1 r H41
2004-12-19 06:26:04 C 04 27 36.30 +52 07 55.5 r H41
2004-12-20 05:48:40 C 04 24 46.92 +51 54 47.8 c 704
2004-12-20 06:11:43 C 04 24 44.08 +51 54 34.4 c 704
2004-12-20 06:35:33 C 04 24 41.11 +51 54 20.4 c 704
2004-12-20 06:58:37 C 04 24 38.26 +51 54 07.0 c 704
2004-12-20 07:21:56 C 04 24 35.36 +51 53 52.7 c 704
2004-12-20 19:42:53 C 04 23 08.66 +51 46 37.1 c A30
2004-12-20 19:46:24 C 04 23 08.24 +51 46 35.1 c A30
2004-12-20 19:48:55 C 04 23 07.95 +51 46 33.6 c A30
2004-12-20 19:52:49 C 04 23 07.48 +51 46 31.4 c A30
2004-12-20 19:55:24 C 04 23 07.18 +51 46 29.8 c A30
2004-12-20 20:21:36 C 04 23 04.02 +51 46 14.1 c A62
2004-12-20 20:24:30 C 04 23 03.66 +51 46 13.0 o 185
2004-12-20 20:27:32 C 04 23 03.26 +51 46 10.7 c A62
2004-12-20 20:31:29 C 04 23 02.80 +51 46 08.3 c A62
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)