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
2004-12-02 08:04:16 C 05 23 24.78 +53 47 14.3 r H41
2004-12-02 08:06:16 C 05 23 24.48 +53 47 14.3 r H41
2004-12-02 08:07:36 C 05 23 24.29 +53 47 14.5 r H41
2004-12-05 20:43:34 C 05 11 39.68 +53 48 21.9 c A32
2004-12-05 20:59:46 C 05 11 37.35 +53 48 21.4 c A32
2004-12-05 21:06:14 C 05 11 36.39 +53 48 21.0 c A32
2004-12-05 21:25:41 C 05 11 33.64 +53 48 20.2 c A32
2004-12-09 21:02:07 C 04 57 58.01 +53 35 32.5 c A30
2004-12-09 21:06:30 C 04 57 57.36 +53 35 31.6 c A30
2004-12-09 21:10:06 C 04 57 56.85 +53 35 30.9 c A30
2004-12-09 21:12:24 C 04 57 56.51 +53 35 30.3 c A30
2004-12-10 06:36:17 C 04 56 35.81 +53 33 28.1 r H41
2004-12-10 06:38:45 C 04 56 35.45 +53 33 27.1 r H41
2004-12-10 06:40:57 C 04 56 35.13 +53 33 27.1 r H41
2004-12-10 06:43:12 C 04 56 34.80 +53 33 26.4 r H41
2004-12-10 08:06:08 C 04 56 22.87 +53 33 06.6 c 704
2004-12-10 08:23:34 C 04 56 20.34 +53 33 02.7 c 704
2004-12-10 08:41:01 C 04 56 17.83 +53 32 58.5 c 704
2004-12-10 08:58:28 C 04 56 15.22 +53 32 53.8 c 704
2004-12-10 09:15:54 C 04 56 12.78 +53 32 48.9 c 704
2004-12-10 21:53:47 C 04 54 26.26 +53 29 42.4 c A32
2004-12-10 22:00:16 C 04 54 25.33 +53 29 40.7 c A32
2004-12-10 22:06:44 C 04 54 24.40 +53 29 39.2 c A32
2004-12-13 11:34:27 C 04 45 49.36 +53 11 00.4 m 379
2004-12-13 11:36:36 C 04 45 49.06 +53 10 59.2 m 379
2004-12-13 11:43:03 C 04 45 48.18 +53 10 57.6 m 379
2004-12-13 11:45:11 C 04 45 47.90 +53 10 57.2 m 379
2004-12-13 17:52:39 C 04 44 57.09 +53 08 40.1 o 084
2004-12-13 19:18:34 C 04 44 45.50 +53 08 09.8 c 127
2004-12-13 19:23:37 C 04 44 44.79 +53 08 08.0 c 127
2004-12-13 19:25:40 C 04 44 44.52 +53 08 08.5 c A30
2004-12-13 19:28:37 C 04 44 44.09 +53 08 06.1 c 127
2004-12-13 19:30:08 C 04 44 43.89 +53 08 07.1 c A30
2004-12-13 19:33:36 C 04 44 43.37 +53 08 05.8 c A30
2004-12-13 19:33:40 C 04 44 43.36 +53 08 04.4 c 127
2004-12-13 19:38:40 C 04 44 42.68 +53 08 02.8 c 127
2004-12-13 19:42:25 C 04 44 42.11 +53 08 02.1 o 240
2004-12-13 19:43:28 C 04 44 41.96 +53 08 01.7 o 240
2004-12-13 19:46:37 C 04 44 41.52 +53 08 00.6 o 240
2004-12-13 19:48:42 C 04 44 41.22 +53 07 59.9 o 240
2004-12-13 19:50:46 C 04 44 40.93 +53 07 59.2 o 240
2004-12-13 19:52:52 C 04 44 40.64 +53 07 58.5 o 240
2004-12-13 19:54:57 C 04 44 40.34 +53 07 57.8 o 240
2004-12-13 19:57:01 C 04 44 40.05 +53 07 57.0 o 240
2004-12-13 19:59:07 C 04 44 39.76 +53 07 56.3 o 240
2004-12-13 20:01:13 C 04 44 39.48 +53 07 55.6 o 240
2004-12-13 22:05:33 C 04 44 21.95 +53 07 12.1 o 160
2004-12-13 22:06:41 C 04 44 21.82 +53 07 11.6 o 160
2004-12-13 22:07:16 C 04 44 21.72 +53 07 11.5 o 160
2004-12-13 22:07:50 C 04 44 21.63 +53 07 11.2 o 160
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)