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
2019-09-10 11:40:24 S 18 33 57.974 -20 03 22.07 L C51
2019-09-10 14:48:54 S 18 35 16.459 -19 51 59.54 L C51
2019-09-10 19:14:09 C 18 37 06.31 -19 36 53.8 t K85
2019-09-10 19:24:10 C 18 37 10.30 -19 36 17.5 t K85
2019-09-10 19:34:11 C 18 37 14.29 -19 35 41.7 t K85
2019-09-10 19:52:11 C 18 37 21.46 -19 34 36.6 t K85
2019-09-11 23:53:00 C 18 48 21.04 -17 55 14.5 q Y00
2019-09-11 23:55:30 C 18 48 21.95 -17 55 06.2 q Y00
2019-09-11 23:57:53 C 18 48 22.90 -17 54 56.6 q Y00
2019-09-15 08:13:07 C 19 15 32.96 -13 39 17.1 V T05
2019-09-15 08:18:31 C 19 15 34.54 -13 39 01.0 V T05
2019-09-15 08:26:36 C 19 15 36.90 -13 38 37.1 V T05
2019-09-15 08:46:20 C 19 15 42.67 -13 37 38.5 V T05
2019-09-17 19:37:21 C 19 32 16.00 -10 55 55.0 q 006
2019-09-17 19:38:21 C 19 32 16.28 -10 55 52.2 q 006
2019-09-17 19:39:22 C 19 32 16.54 -10 55 49.9 q 006
2019-09-17 19:40:22 C 19 32 16.79 -10 55 47.9 q 006
2019-09-17 19:41:23 C 19 32 16.99 -10 55 44.3 q 006
2019-09-17 19:42:23 C 19 32 17.26 -10 55 42.2 q 006
2019-09-17 19:43:24 C 19 32 17.50 -10 55 39.8 q 006
2019-09-17 19:44:25 C 19 32 17.79 -10 55 36.6 q 006
2019-09-19 19:35:01 C 19 44 03.79 -08 59 17.1 q 006
2019-09-19 19:36:53 C 19 44 04.21 -08 59 12.9 q 006
2019-09-19 19:38:45 C 19 44 04.57 -08 59 09.1 q 006
2019-09-19 19:40:37 C 19 44 04.98 -08 59 04.9 q 006
2019-09-19 19:42:29 C 19 44 05.39 -08 59 00.1 q 006
2019-09-19 19:44:21 C 19 44 05.79 -08 58 56.3 q 006
2019-09-19 19:46:13 C 19 44 06.26 -08 58 51.9 q 006
2019-09-19 19:48:06 C 19 44 06.67 -08 58 47.6 q 006
2019-09-20 01:05:50 C 19 45 20.09 -08 46 39.9 q W46
2019-09-20 01:22:42 C 19 45 23.79 -08 46 01.6 q W46
2019-09-20 01:36:52 C 19 45 26.90 -08 45 29.5 q W46
2019-09-20 08:17:56 C 19 46 57.08 -08 30 20.6 V T05
2019-09-20 08:22:03 C 19 46 57.94 -08 30 11.4 V T05
2019-09-20 08:30:19 C 19 46 59.77 -08 29 52.6 V T05
2019-09-20 08:47:45 C 19 47 03.54 -08 29 13.5 V T05
2019-09-20 19:19:54 C 19 49 25.90 -08 06 21.2 q G33
2019-09-20 19:26:12 C 19 49 27.25 -08 06 07.6 q G33
2019-09-20 19:33:14 C 19 49 28.76 -08 05 52.4 q G33
2019-09-21 19:22:11 C 19 54 35.48 -07 15 37.2 q 006
2019-09-21 19:23:12 C 19 54 35.70 -07 15 35.0 q 006
2019-09-21 19:24:42 C 19 54 35.97 -07 15 31.9 q 006
2019-09-21 19:25:42 C 19 54 36.15 -07 15 30.0 q 006
2019-09-21 19:26:42 C 19 54 36.37 -07 15 28.0 q 006
2019-09-21 19:27:41 C 19 54 36.55 -07 15 26.0 q 006
2019-09-21 19:28:42 C 19 54 36.79 -07 15 23.6 q 006
2019-09-21 20:34:27 C 19 54 49.87 -07 13 13.7 q G33
2019-09-21 20:41:20 C 19 54 51.25 -07 12 59.8 q G33
2019-09-21 20:46:19 C 19 54 52.27 -07 12 49.2 q G33
2019-09-24 03:32:23 C 20 05 40.45 -05 27 56.7 V 654
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)