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
2015-02-07 10:43:20 C 13 43 11.78 -08 56 01.4 q H21
2015-02-07 10:47:41 C 13 43 12.42 -08 56 11.4 q H21
2015-02-07 10:52:02 C 13 43 13.06 -08 56 21.3 q H21
2015-02-07 10:55:51 C 13 43 13.62 -08 56 30.2 q H21
2015-02-14 12:13:58 C 14 12 09.51 -16 14 41.5 q 703
2015-02-14 12:23:24 C 14 12 11.26 -16 15 08.7 q 703
2015-02-14 12:32:50 C 14 12 13.03 -16 15 37.1 q 703
2015-02-14 12:42:16 C 14 12 14.80 -16 16 03.4 q 703
2015-02-18 23:31:37 C 14 34 57.07 -21 46 24.3 o K95
2015-02-18 23:43:24 C 14 34 59.76 -21 47 03.5 o K95
2015-02-18 23:55:50 C 14 35 02.60 -21 47 44.9 o K95
2015-03-06 19:12:21 S 16 48 11.60 -43 53 08.1 L C51
2015-03-06 22:21:25 S 16 49 46.23 -44 02 25.3 L C51
2015-03-06 23:56:01 S 16 50 33.72 -44 07 01.6 L C51
2015-03-07 01:30:38 S 16 51 21.35 -44 11 37.1 L C51
2015-03-07 03:05:16 S 16 52 09.05 -44 16 10.6 L C51
2015-03-07 04:39:41 S 16 52 56.84 -44 20 43.1 L C51
2015-03-07 04:39:52 S 16 52 57.01 -44 20 42.5 L C51
2015-03-07 09:23:32 S 16 55 21.130 -44 34 13.08 L C51
2015-04-12 03:15:57 C 22 45 00.82 -36 45 12.9 o K95
2015-04-12 03:32:11 C 22 45 03.73 -36 44 44.3 o K95
2015-04-12 03:45:10 C 22 45 06.08 -36 44 21.7 o K95
2015-04-12 03:58:09 C 22 45 08.37 -36 43 58.8 o K95
2015-04-25 02:57:04 C 23 31 38.09 -27 36 32.0 o K95
2015-04-25 03:03:36 C 23 31 38.92 -27 36 20.7 o K95
2015-04-25 03:10:08 C 23 31 39.75 -27 36 09.9 o K95
2015-07-03 04:14:40 C 02 14 52.28 +12 06 46.8 o Z22
2015-07-03 04:52:40 C 02 14 55.54 +12 07 30.4 o Z22
2015-07-03 05:03:21 C 02 14 56.49 +12 07 41.2 o Z22
2015-07-04 04:38:09 C 02 17 00.80 +12 34 09.2 o Z22
2015-07-04 04:49:09 C 02 17 01.84 +12 34 21.1 o Z22
2015-07-06 04:19:47 C 02 21 11.30 +13 27 04.4 o Z22
2015-07-06 04:31:07 C 02 21 12.23 +13 27 18.3 o Z22
2015-07-06 04:42:29 C 02 21 13.23 +13 27 30.1 o Z22
2015-07-20 10:37:56 C 02 50 14.83 +19 24 16.9 R G45
2015-07-20 10:48:02 C 02 50 15.57 +19 24 26.2 R G45
2015-07-20 10:58:04 C 02 50 16.39 +19 24 36.5 R G45
2015-07-20 11:08:15 C 02 50 17.22 +19 24 46.6 R G45
2015-07-21 10:28:39 C 02 52 12.03 +19 47 47.2 R G45
2015-07-21 10:38:44 C 02 52 12.84 +19 47 57.1 R G45
2015-07-21 10:48:44 C 02 52 13.63 +19 48 07.2 R G45
2015-07-21 10:58:55 C 02 52 14.46 +19 48 16.9 R G45
2015-07-21 11:09:04 C 02 52 15.26 +19 48 27.2 R G45
2015-08-04 22:57:45 C 03 19 25.24 +25 14 11.2 o C41
2015-08-04 23:03:52 C 03 19 25.69 +25 14 18.1 o C41
2015-08-07 01:57:49 C 03 23 09.56 +25 59 39.5 q 160
2015-08-07 02:00:38 C 03 23 09.74 +25 59 41.4 q 160
2015-08-07 02:03:27 C 03 23 09.93 +25 59 43.8 q 160
2015-08-13 03:07:56 C 03 33 21.72 +28 06 22.5 t 160
2015-08-13 03:10:51 C 03 33 21.97 +28 06 25.4 t 160
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)