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
1951-08-31 10:56:00 A 02 06 07.38 +25 24 45.5 675
1951-08-31 11:06:59 A 02 06 04.92 +25 25 04.1 675
1951-08-31 11:57:00 A 02 05 54.22 +25 26 22.0 675
1951-09-14 05:44:59 A 00 56.4 +31 09 14.0 675
1951-09-14 11:44:59 A 00 55 01.73 +31 11 51.6 675
1951-09-19 01:16:21 A 00 33 30.78 +31 42 22.6 754
1951-09-20 04:09:34 A 00 28 31.01 +31 44 35.9 662
1951-09-20 04:26:32 A 00 28 27.81 +31 44 38.3 662
1951-09-20 10:51:27 A 00 27 33 +31 45.0 13.0 388
1951-09-20 22:02:58 A 00 25 15.39 +31 45 03.3 13.0 008
1951-09-20 22:16:55 A 00 25 12.75 +31 45 03.8 008
1951-09-23 02:03:14 A 00 16 11.34 +31 41 29.5 754
1951-09-24 21:16:13 A 00 09 05.22 +31 33 59.3 008
1951-09-24 21:27:12 A 00 09 03.41 +31 33 57.5 008
1951-09-29 04:11:03 A 23 53 55.70 +31 01 44.8 672
1951-09-29 04:15:03 A 23 53 54.84 +31 01 42.6 672
1951-09-29 04:45:58 A 23 53 50.68 +31 01 31.9 672
1951-09-30 04:35:03 A 23 50 42.05 +30 51 43.7 672
1951-09-30 04:38:02 A 23 50 41.65 +30 51 42.2 672
1951-09-30 04:41:32 A 23 50 41.19 +30 51 40.9 672
1951-09-30 04:44:28 A 23 50 40.76 +30 51 39.6 672
1951-10-02 03:15:33 A 23 44 56.41 +30 30 30.2 672
1951-10-02 03:28:48 A 23 44 54.83 +30 30 24.6 672
1951-10-04 06:10:29 A 23 39 14.40 +30 04 55.1 662
1951-10-04 06:22:29 A 23 39 13.00 +30 04 49.0 662
1951-10-27 03:21:41 A 23 11 17.93 +24 57 34.0 672
1951-10-27 03:26:11 A 23 11 17.90 +24 57 31.6 672
1951-10-27 03:31:11 A 23 11 17.84 +24 57 29.4 672
1951-10-28 02:44:41 A 23 11 10.40 +24 46 09.1 672
1951-10-28 02:48:56 A 23 11 10.35 +24 46 07.3 672
1951-10-28 02:53:56 A 23 11 10.34 +24 46 05.0 672
1951-10-29 07:33:29 A 23 11 04.89 +24 32 27.6 711
1951-10-29 07:50:28 A 23 11 04.86 +24 32 19.2 711
1951-10-30 07:25:56 A 23 11 05.85 +24 21 25.4 711
1951-11-01 06:08:00 A 23 11 18.96 +24 00 43.9 711
1951-11-02 03:37:28 A 23 11 29.59 +23 52 36.1 711
1951-11-03 07:09:58 A 23 11 47.09 +23 40 11.5 711
1951-11-04 02:16:29 A 23 12 03.08 +23 32 33.6 711
1951-11-25 04:31:47 A 23 28 43.55 +21 18 51.6 672
1951-11-25 04:38:47 A 23 28 43.90 +21 18 50.7 672
1951-11-25 04:46:18 A 23 28 44.24 +21 18 49.3 672
1951-12-21 06:15:13 A 00 06 11.91 +21 07 14.0 672
1951-12-21 06:24:58 A 00 06 13.15 +21 07 03.0 672
1951-12-22 04:43:58 A 00 07 45.82 +21 09 11.4 672
1951-12-22 04:57:06 A 00 07 46.69 +21 09 13.0 672
1951-12-22 05:10:28 A 00 07 47.62 +21 09 14.2 672
1954-10-23 08:32:34 A 06 09 31.29 +46 55 25.8 711
1954-10-23 08:58:04 A 06 09 31.33 +46 55 40.7 711
1954-10-24 10:42:33 A 06 09 31.83 +47 10 51.0 711
1954-10-24 10:59:02 A 06 09 31.68 +47 11 00.9 711
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)