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
2016-02-29 04:08:48 C 03 19 13.09 +31 28 01.3 q 703
2016-03-31 02:43:41 C 04 31 56.45 +31 12 03.0 q 703
2016-03-31 02:50:11 C 04 31 57.10 +31 12 02.6 q 703
2016-03-31 02:56:41 C 04 31 57.78 +31 12 02.3 q 703
2016-03-31 03:03:10 C 04 31 58.42 +31 12 01.9 q 703
2016-04-02 05:49:03 C 04 37 18.746 +31 09 03.61 L F51
2016-04-02 05:56:48 C 04 37 19.556 +31 09 03.08 L F51
2016-04-02 06:04:32 C 04 37 20.365 +31 09 02.52 L F51
2016-04-02 06:12:16 C 04 37 21.176 +31 09 01.93 L F51
2017-01-06 17:33:59 C 22 12 55.06 -05 40 21.2 q 160
2017-01-06 17:36:59 C 22 12 55.45 -05 40 18.4 q 160
2017-01-06 17:39:47 C 22 12 55.83 -05 40 16.3 q 160
2017-01-11 17:19:07 C 22 28 11.36 -03 45 12.1 q 160
2017-01-11 17:21:24 C 22 28 11.62 -03 45 10.1 q 160
2017-01-11 17:23:40 C 22 28 11.87 -03 45 07.8 q 160
2017-11-23 15:07:03 C 13 00 13.69 -06 43 12.2 U T08
2017-11-23 15:19:37 C 13 00 15.50 -06 43 29.0 U T08
2017-11-23 15:32:28 C 13 00 17.41 -06 43 44.9 U T08
2017-11-23 15:45:37 C 13 00 19.28 -06 43 59.2 U T08
2018-09-26 11:53:17 C 06 58 34.35 +37 50 27.9 U I41
2018-09-26 12:38:13 C 06 58 38.23 +37 50 35.7 U I41
2018-09-28 09:50:34 C 07 02 35.04 +37 58 06.6 V 703
2018-09-28 09:58:22 C 07 02 35.62 +37 58 09.9 V 703
2018-09-28 10:06:10 C 07 02 36.36 +37 58 10.6 V 703
2018-09-28 10:13:59 C 07 02 37.04 +37 58 12.0 V 703
2018-09-29 11:14:16 C 07 04 46.47 +38 02 23.0 V G96
2018-09-29 11:21:46 C 07 04 47.10 +38 02 24.3 V G96
2018-09-29 11:29:16 C 07 04 47.74 +38 02 25.6 V G96
2018-09-29 11:36:44 C 07 04 48.37 +38 02 26.9 V G96
2018-10-25 14:07:22 C 07 52 14.71 +39 58 13.0 U T05
2018-10-25 14:18:42 C 07 52 15.41 +39 58 15.6 U T05
2018-10-25 14:30:02 C 07 52 16.09 +39 58 18.4 U T05
2018-10-25 14:41:21 C 07 52 16.79 +39 58 20.7 U T05
2018-10-26 08:53:29 C 07 53 25.44 +40 02 24.2 V 703
2018-10-26 09:00:44 C 07 53 25.84 +40 02 24.9 V 703
2018-10-26 09:15:14 C 07 53 26.83 +40 02 29.9 V 703
2018-11-03 08:59:27 C 08 04 22.80 +40 50 21.5 V 703
2018-11-03 09:06:36 C 08 04 23.18 +40 50 23.5 V 703
2018-11-03 09:13:45 C 08 04 23.54 +40 50 25.6 V 703
2018-11-03 09:20:54 C 08 04 23.84 +40 50 27.6 V 703
2018-11-06 11:31:09 C 08 08 01.56 +41 11 35.3 V 703
2018-11-06 11:39:07 C 08 08 01.91 +41 11 37.6 V 703
2018-11-06 11:47:07 C 08 08 02.25 +41 11 40.2 V 703
2018-11-06 11:55:11 C 08 08 02.61 +41 11 42.7 V 703
2018-11-06 13:59:06 C 08 08 08.54 +41 12 20.3 U T05
2018-11-06 14:11:08 C 08 08 09.05 +41 12 24.1 U T05
2018-11-06 14:23:51 C 08 08 09.60 +41 12 27.9 U T05
2018-11-06 14:35:48 C 08 08 10.15 +41 12 32.0 U T05
2018-11-08 13:42:33 C 08 10 16.36 +41 26 49.4 U T08
2018-11-08 13:54:33 C 08 10 16.85 +41 26 52.9 U T08
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)