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
2002-03-05 03:32:23 C 02 44 19.25 +28 09 21.6 c 699
2003-10-27 11:43:40 C 10 40 55.31 +15 51 47.5 o 699
2003-10-27 11:58:05 C 10 40 56.94 +15 51 37.1 o 699
2003-10-27 12:12:31 C 10 40 58.44 +15 51 25.5 o 699
2003-10-27 12:26:57 C 10 41 00.03 +15 51 14.3 o 699
2003-11-24 10:44:07 C 11 57 11.10 +05 40 25.2 c 704
2003-11-24 11:02:27 C 11 57 13.27 +05 40 04.3 c 704
2003-11-24 11:20:34 C 11 57 15.43 +05 39 45.6 c 704
2003-11-24 11:38:59 C 11 57 17.50 +05 39 25.8 c 704
2003-11-24 11:57:18 C 11 57 19.78 +05 39 08.2 c 704
2003-12-13 11:08:47 C 12 55 03.65 -03 04 49.8 c 704
2003-12-13 11:27:33 C 12 55 06.13 -03 05 13.5 c 704
2003-12-13 11:46:29 C 12 55 08.70 -03 05 37.0 c 704
2003-12-13 12:05:08 C 12 55 11.24 -03 06 00.4 c 704
2003-12-13 12:24:05 C 12 55 13.79 -03 06 24.3 c 704
2003-12-17 12:19:44 C 13 08 31.67 -05 08 58.1 d 703
2003-12-17 12:31:15 C 13 08 33.27 -05 09 13.5 d 703
2003-12-17 12:42:45 C 13 08 34.84 -05 09 28.5 d 703
2003-12-17 12:54:13 C 13 08 36.50 -05 09 44.2 d 703
2004-08-19 09:34:55 C 04 44 02.38 +33 53 59.5 c 704
2004-08-19 09:49:33 C 04 44 03.76 +33 54 05.7 c 704
2004-08-19 10:04:12 C 04 44 04.96 +33 54 13.5 c 704
2004-08-19 10:18:43 C 04 44 06.39 +33 54 20.5 c 704
2004-08-19 10:33:14 C 04 44 07.55 +33 54 28.2 c 704
2004-09-06 09:30:13 C 05 21 29.63 +37 17 29.7 c 704
2004-09-06 09:45:55 C 05 21 30.90 +37 17 36.4 c 704
2004-09-06 10:17:21 C 05 21 33.41 +37 17 50.9 c 704
2004-09-06 10:33:38 C 05 21 34.70 +37 17 58.5 c 704
2004-09-11 09:39:12 C 05 31 03.35 +38 11 30.8 c 704
2004-09-11 09:57:35 C 05 31 04.76 +38 11 39.4 c 704
2004-09-11 10:13:54 C 05 31 05.96 +38 11 47.0 c 704
2004-09-11 10:30:22 C 05 31 07.22 +38 11 55.1 c 704
2004-09-11 10:47:06 C 05 31 08.49 +38 12 02.3 c 704
2004-09-13 09:54:19 C 05 34 45.81 +38 33 06.4 c 704
2004-09-13 10:11:37 C 05 34 47.09 +38 33 14.6 c 704
2004-09-13 10:28:44 C 05 34 48.34 +38 33 22.1 c 704
2004-09-13 10:46:43 C 05 34 49.71 +38 33 30.3 c 704
2004-09-13 11:03:14 C 05 34 50.94 +38 33 38.0 c 704
2004-09-14 23:26:09 C 05 37 35.11 +38 49 49.2 o 084
2004-09-19 23:15:17 C 05 46 14.25 +39 43 30.8 o 084
2004-10-03 08:53:15 C 06 06 09.35 +42 11 50.1 c 704
2004-10-03 09:08:41 C 06 06 10.12 +42 11 56.9 c 704
2004-10-03 09:24:18 C 06 06 10.92 +42 12 05.2 c 704
2004-10-12 00:09:27 C 06 15 39.96 +43 53 58.3 c A32
2004-10-12 00:17:34 C 06 15 40.26 +43 54 02.4 c A32
2004-10-12 00:25:41 C 06 15 40.55 +43 54 07.1 c A32
2004-10-12 00:34:36 C 06 15 40.87 +43 54 11.8 c A32
2004-10-16 00:02:30 C 06 18 54.98 +44 43 41.9 o 084
2004-10-16 09:44:21 C 06 19 12.04 +44 48 53.1 c 704
2004-10-16 10:01:12 C 06 19 12.50 +44 49 01.7 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)