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
2015-11-25 03:22:29 C 01 57 04.53 +45 14 21.9 u H21
2015-11-25 03:25:30 C 01 57 04.31 +45 14 19.6 u H21
2015-11-25 03:28:30 C 01 57 04.03 +45 14 17.2 u H21
2015-11-25 03:31:31 C 01 57 03.78 +45 14 15.1 u H21
2015-11-25 03:34:32 C 01 57 03.54 +45 14 12.7 u H21
2015-11-25 03:37:32 C 01 57 03.32 +45 14 10.3 u H21
2015-11-25 03:40:33 C 01 57 03.07 +45 14 08.1 u H21
2015-11-25 03:43:34 C 01 57 02.82 +45 14 05.7 u H21
2015-11-25 03:45:30 C 01 57 02.67 +45 14 04.3 u H21
2015-11-28 19:19:43 C 01 50 51.85 +44 06 43.3 q K73
2015-11-30 00:50:04 C 01 49 03.15 +43 43 40.7 o Z22
2015-11-30 01:01:23 C 01 49 02.44 +43 43 32.3 o Z22
2015-11-30 01:16:03 C 01 49 01.55 +43 43 19.7 o Z22
2015-12-01 06:45:30 C 01 47 22.52 +43 20 12.4 q 703
2015-12-01 06:54:13 C 01 47 21.98 +43 20 05.9 q 703
2015-12-01 07:02:57 C 01 47 21.53 +43 19 57.5 q 703
2015-12-01 07:11:40 C 01 47 20.94 +43 19 51.6 q 703
2015-12-01 18:55:13 C 01 46 44.85 +43 10 38.4 c A24
2015-12-01 18:56:15 C 01 46 44.79 +43 10 37.7 c A24
2015-12-01 19:27:25 C 01 46 42.95 +43 10 14.6 q K73
2015-12-01 19:58:39 C 01 46 41.37 +43 09 49.1 c A24
2015-12-01 19:59:42 C 01 46 41.32 +43 09 48.4 c A24
2015-12-01 20:34:03 C 01 46 39.26 +43 09 20.7 q K73
2015-12-02 17:28:44 C 01 45 37.40 +42 52 57.1 q K73
2015-12-02 18:37:24 C 01 45 33.91 +42 52 04.5 q K73
2015-12-03 18:49:13 C 01 44 26.93 +42 33 09.4 q K73
2015-12-03 19:32:19 C 01 44 24.96 +42 32 36.0 q K73
2015-12-04 05:41:31 C 01 43 58.08 +42 24 41.7 R G45
2015-12-04 05:48:47 C 01 43 57.76 +42 24 35.7 R G45
2015-12-04 05:48:59 C 01 43 57.75 +42 24 35.9 R G45
2015-12-04 05:50:38 C 01 43 57.66 +42 24 34.1 R G45
2015-12-04 05:58:12 C 01 43 57.33 +42 24 28.5 R G45
2015-12-04 05:59:53 C 01 43 57.25 +42 24 26.8 R G45
2015-12-04 06:06:59 C 01 43 56.91 +42 24 21.6 R G45
2015-12-05 20:33:55 C 01 42 26.19 +41 54 30.5 a 233
2015-12-05 20:40:57 C 01 42 25.90 +41 54 25.0 a 233
2015-12-05 20:46:25 C 01 42 25.70 +41 54 20.8 a 233
2015-12-08 02:26:06 C 01 40 40.97 +41 13 19.9 q 703
2015-12-08 02:30:27 C 01 40 40.86 +41 13 17.5 q 703
2015-12-08 02:34:46 C 01 40 40.83 +41 13 14.7 q 703
2015-12-08 02:39:05 C 01 40 40.68 +41 13 09.8 q 703
2015-12-08 07:12:57 C 01 40 32.72 +41 09 46.0 L T05
2015-12-08 07:33:41 C 01 40 32.04 +41 09 30.0 L T05
2015-12-08 07:53:22 C 01 40 31.43 +41 09 15.4 L T05
2015-12-08 08:21:42 C 01 40 30.54 +41 08 53.8 L T05
2015-12-08 17:27:08 C 01 40 16.35 +41 01 56.9 q 246
2015-12-08 17:28:08 C 01 40 16.31 +41 01 56.1 q 246
2015-12-08 17:29:10 C 01 40 16.28 +41 01 55.3 q 246
2015-12-08 17:29:36 C 01 40 16.27 +41 01 55.0 q 246
2015-12-08 17:30:01 C 01 40 16.27 +41 01 54.6 q 246
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)