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
2001-10-14 20:06:06 C 00 04 13.41 +34 19 57.0 c 198
2001-10-14 20:14:34 C 00 04 12.57 +34 19 52.7 c 203
2001-10-14 20:21:02 C 00 04 11.94 +34 19 47.6 c 198
2001-10-14 20:25:39 C 00 04 11.49 +34 19 44.7 c 198
2001-10-14 20:50:34 C 00 04 08.99 +34 19 30.1 c 203
2001-10-14 22:00:57 C 00 04 02.01 +34 18 43.3 c 127
2001-10-14 22:08:05 C 00 04 01.31 +34 18 39.2 c 127
2001-10-14 22:14:39 C 00 04 00.69 +34 18 34.3 c 127
2001-10-15 20:28:01 C 00 01 58.07 +34 04 08.6 610
2001-10-15 20:31:00 C 00 01 57.78 +34 04 06.7 610
2001-10-15 20:34:01 C 00 01 57.49 +34 04 04.7 610
2001-10-15 20:37:01 C 00 01 57.21 +34 04 02.8 610
2001-10-15 20:40:00 C 00 01 56.92 +34 04 00.9 610
2001-10-15 20:43:01 C 00 01 56.63 +34 03 59.0 610
2001-10-15 20:46:01 C 00 01 56.35 +34 03 57.0 610
2001-10-15 20:49:00 C 00 01 56.06 +34 03 55.1 610
2001-10-16 18:49:46 C 00 00 00.52 +33 49 16.0 c 127
2001-10-16 18:56:25 C 23 59 59.97 +33 49 11.4 c 127
2001-10-16 19:03:25 C 23 59 59.34 +33 49 07.0 c 127
2001-10-17 03:50:22 C 23 59 14.63 +33 43 15.0 c 642
2001-10-17 03:57:04 C 23 59 14.06 +33 43 10.7 c 642
2001-10-17 04:03:44 C 23 59 13.46 +33 43 06.3 c 642
2001-10-17 05:43:42 C 23 59 04.462 +33 42 05.03 g 689
2001-10-19 05:31:30 C 23 55 18.150 +33 09 34.65 g 689
2001-10-19 17:24:34 C 23 54 26.47 +33 01 15.0 o 084
2001-10-19 18:22:52 C 23 54 22.54 +33 00 38.2 151
2001-10-19 18:46:22 C 23 54 20.78 +33 00 22.5 151
2001-10-19 18:49:14 C 23 54 20.56 +33 00 20.7 151
2001-10-19 18:52:30 C 23 54 20.36 +33 00 18.1 151
2001-10-19 18:58:32 C 23 54 19.86 +33 00 14.3 151
2001-10-19 19:01:17 C 23 54 19.66 +33 00 12.6 151
2001-10-22 19:08:00 C 23 49 38.37 +32 10 16.8 610
2001-10-22 19:12:00 C 23 49 38.11 +32 10 14.1 610
2001-10-22 19:16:01 C 23 49 37.86 +32 10 11.3 610
2001-10-22 19:20:01 C 23 49 37.61 +32 10 08.6 610
2001-10-22 19:24:00 C 23 49 37.36 +32 10 05.8 610
2001-10-25 19:15:05 C 23 45 52.85 +31 20 31.5 056
2001-10-25 19:32:03 C 23 45 52.10 +31 20 20.5 056
2001-10-26 19:56:53 C 23 44 47.96 +31 03 43.4 d 151
2001-10-26 19:59:51 C 23 44 47.84 +31 03 41.3 d 151
2001-10-26 20:03:01 C 23 44 47.69 +31 03 39.1 d 151
2001-10-26 20:06:56 C 23 44 47.51 +31 03 36.4 d 151
2001-10-27 02:56:04 C 23 44 30.88 +30 59 01.3 16.3 447
2001-10-27 03:15:42 C 23 44 29.97 +30 58 48.2 16.4 447
2001-10-27 03:23:38 C 23 44 29.18 +30 58 44.5 450
2001-10-27 03:27:18 C 23 44 29.47 +30 58 40.6 16.0 447
2001-10-27 03:44:33 C 23 44 28.69 +30 58 29.0 15.6 447
2001-10-27 03:49:08 C 23 44 28.05 +30 58 27.0 450
2001-10-27 03:58:00 C 23 44 28.14 +30 58 21.8 15.5 c 704
2001-10-27 04:21:35 C 23 44 27.07 +30 58 05.9 15.4 c 704
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)