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
1969-09-05 19:33:23 A 20 04 55.84 -13 45 29.0 020
1969-09-05 19:43:21 A 20 04 58.54 -13 44 31.4 020
1969-09-05 22:20:11 A 20 05 42.90 -13 29 20.5 012
1969-09-06 02:48:04 A 20 07.08 -13 03.5 693
1969-09-06 18:27:48 A 20 11 24.46 -11 38 21.3 095
1969-09-06 18:37:48 A 20 11 26.86 -11 37 30.5 095
1969-09-06 18:53:18 A 20 11 30.71 -11 36 09.2 095
1969-09-06 22:06:17 A 20 12 20.54 -11 19 30.4 012
1969-09-07 01:39:11 A 20 13 16.93 -10 59 41.9 805
1969-09-07 01:42:10 A 20 13 17.74 -10 59 24.8 805
1969-09-07 01:45:10 A 20 13 18.49 -10 59 10.5 805
1969-09-07 01:48:10 A 20 13 19.14 -10 58 55.7 805
1969-09-07 01:51:09 A 20 13 19.83 -10 58 40.3 805
1969-09-08 01:26:16 A 20 19 03.04 -09 06 09.3 805
1969-09-08 01:29:15 A 20 19 03.65 -09 05 56.3 805
1969-09-08 01:32:14 A 20 19 04.33 -09 05 42.4 805
1969-09-08 01:35:14 A 20 19 04.99 -09 05 28.6 805
1969-09-08 01:38:14 A 20 19 05.58 -09 05 15.2 805
1969-09-08 16:14:46 A 20 23 02.74 -07 49 02.5 073
1969-09-08 17:58:46 A 20 22 41.99 -07 56 05.5 095
1969-09-08 18:12:51 A 20 22 44.76 -07 55 08.3 095
1969-09-08 18:28:41 A 20 22 47.80 -07 54 00.9 095
1969-09-08 18:39:42 A 20 22 50.02 -07 53 15.3 095
1969-09-08 21:00:00 A 20 23 18.24 -07 43 38.3 056
1969-09-08 21:22:59 A 20 23 22.71 -07 42 04.6 056
1969-09-09 15:03:02 A 20 27 42.95 -06 17 38.0 073
1969-09-09 16:00:52 A 20 27 54.15 -06 14 03.1 073
1969-09-09 18:46:18 A 20 27 40.28 -06 18 38.4 095
1969-09-09 19:06:11 A 20 27 43.76 -06 17 25.1 095
1969-09-09 19:23:39 A 20 27 46.77 -06 16 20.4 095
1969-09-09 20:19:00 A 20 27 57.25 -06 12 58.8 056
1969-09-09 20:28:59 A 20 27 59.16 -06 12 22.3 056
1969-09-09 20:41:00 A 20 28 01.06 -06 11 34.7 056
1969-09-09 20:51:00 A 20 28 02.88 -06 11 00.1 056
1969-09-09 21:11:00 A 20 28 06.47 -06 09 45.5 056
1969-09-09 21:20:59 A 20 28 08.17 -06 09 12.2 056
1969-09-09 21:31:00 A 20 28 10.08 -06 08 33.9 056
1969-09-09 21:40:59 A 20 28 11.81 -06 07 57.0 056
1969-09-09 21:51:00 A 20 28 13.47 -06 07 21.4 056
1969-09-09 23:28:44 A 20 28 35.92 -05 59 53.0 805
1969-09-09 23:33:43 A 20 28 36.82 -05 59 35.9 805
1969-09-09 23:38:42 A 20 28 37.63 -05 59 17.2 805
1969-09-10 00:28:34 A 20 28 46.17 -05 56 18.1 805
1969-09-10 00:33:33 A 20 28 47.02 -05 56 00.2 805
1969-09-10 00:38:32 A 20 28 47.84 -05 55 42.1 805
1969-09-10 01:28:24 A 20 28 56.20 -05 52 44.1 805
1969-09-10 01:33:23 A 20 28 57.08 -05 52 26.6 805
1969-09-10 01:38:22 A 20 28 57.84 -05 52 08.6 805
1969-09-10 02:28:14 A 20 29 06.18 -05 49 09.8 805
1969-09-10 02:33:13 A 20 29 07.00 -05 48 52.3 805
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)