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
1994-02-17 20:56:05 C 05 55 45.48 +38 59 12.1 z 046
1994-02-17 21:03:35 C 05 55 45.26 +38 59 04.8 z 046
1994-02-17 21:05:23 C 05 55 45.18 +38 59 03.1 z 046
1994-02-17 21:06:28 C 05 55 45.16 +38 59 02.3 z 046
1994-02-17 21:07:35 C 05 55 45.12 +38 59 00.8 z 046
1994-02-17 21:08:40 C 05 55 45.08 +38 59 00.0 z 046
1994-02-17 21:09:50 C 05 55 45.06 +38 58 58.9 z 046
1994-02-18 05:15:13 05 55 31.76 +38 51 18.2 711
1994-02-19 18:55:55 C 05 54 39.61 +38 15 20.6 z 046
1994-02-19 18:57:06 C 05 54 39.56 +38 15 19.4 z 046
1994-02-19 18:58:47 C 05 54 39.51 +38 15 17.8 z 046
1994-02-19 19:00:31 C 05 54 39.45 +38 15 16.1 z 046
1994-02-19 19:01:54 C 05 54 39.43 +38 15 14.8 z 046
1994-02-19 19:03:17 C 05 54 39.40 +38 15 13.4 z 046
1994-02-19 19:04:25 C 05 54 39.37 +38 15 12.3 z 046
1994-02-19 19:05:34 C 05 54 39.35 +38 15 11.3 z 046
1994-02-20 03:21:44 C 05 54 29.67 +38 07 24.4 z 689
1994-02-24 14:16:03 A 05 53 18.27 +36 27 09.7 z 381
1994-02-24 14:32:43 A 05 53 18.20 +36 26 54.3 z 381
1994-02-27 00:13:56 C 05 53 20.82 +35 34 00.0 16.9 z 817
1994-02-27 00:43:50 C 05 53 20.76 +35 33 32.4 z 817
1994-02-28 01:08:28 C 05 53 29.17 +35 11 25.3 16.2 z 817
1994-02-28 01:40:55 C 05 53 29.31 +35 10 56.0 16.2 z 817
1994-03-02 02:41:57 C 05 54 00.07 +34 27 04.0 z 689
1994-03-03 02:38:22 C 05 54 21.00 +34 05 53.3 z 689
1994-03-05 19:01:50 C 05 55 36.34 +33 09 35.4 z 540
1994-03-05 19:09:09 C 05 55 36.52 +33 09 29.9 z 540
1994-03-05 19:16:03 C 05 55 36.59 +33 09 23.6 z 540
1994-03-05 19:22:43 C 05 55 36.75 +33 09 17.7 z 540
1994-03-05 21:06:40 05 55 39.05 +33 07 45.4 m 494
1994-03-11 19:15:49 C 05 59 55.77 +31 07 40.5 z 540
1994-03-11 19:22:09 C 05 59 55.94 +31 07 34.9 z 540
1994-03-11 19:28:51 C 05 59 56.15 +31 07 29.7 z 540
1994-03-11 19:34:52 C 05 59 56.40 +31 07 25.0 z 540
1994-03-12 00:34:37 C 06 00 07.54 +31 03 18.1 z 801
1994-03-12 00:50:55 C 06 00 08.09 +31 03 04.7 z 801
1994-03-21 00:59:03 C 06 09 58.44 +28 09 13.4 z 801
1994-03-21 02:47:09 C 06 10 04.13 +28 07 50.8 711
1994-03-21 03:04:00 C 06 10 05.07 +28 07 37.1 711
1994-03-21 03:23:49 C 06 10 06.04 +28 07 21.2 711
1994-03-21 03:33:55 C 06 10 06.56 +28 07 13.3 711
1994-03-21 03:45:12 C 06 10 07.11 +28 07 04.3 711
1994-03-22 02:49:56 C 06 11 22.03 +27 48 58.9 711
1994-03-22 03:32:16 C 06 11 24.34 +27 48 24.6 z 696
1994-03-22 03:42:52 C 06 11 24.88 +27 48 16.6 z 696
1994-03-23 02:31:20 C 06 12 41.00 +27 30 27.3 z 696
1994-03-23 02:36:05 C 06 12 41.26 +27 30 23.7 z 696
1994-04-03 19:42:29 C 06 30 28.97 +23 53 02.4 z 587
1994-04-03 20:10:42 C 06 30 30.91 +23 52 40.7 z 587
1994-04-06 19:04:08 C 06 35 33.06 +22 57 45.0 z 587
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)