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
2019-12-12 06:31:54 C 23 14 10.43 +12 58 25.4 V T08
2019-12-12 06:37:39 C 23 14 10.91 +12 58 27.4 V T08
2019-12-12 06:46:06 C 23 14 11.62 +12 58 30.3 V T08
2019-12-12 07:03:05 C 23 14 13.02 +12 58 36.3 V T08
2019-12-15 02:16:56 C 23 19 54.99 +13 22 18.4 o 691
2019-12-15 02:35:35 C 23 19 56.56 +13 22 24.7 o 691
2019-12-15 02:54:06 C 23 19 58.09 +13 22 31.3 o 691
2019-12-15 07:07:57 C 23 20 19.50 +13 24 02.2 V T08
2019-12-15 07:12:45 C 23 20 19.88 +13 24 03.7 V T08
2019-12-15 07:20:42 C 23 20 20.51 +13 24 06.6 V T08
2019-12-15 07:40:53 C 23 20 22.24 +13 24 14.1 V T08
2019-12-16 06:59:58 C 23 22 21.06 +13 32 30.5 V T08
2019-12-16 07:04:41 C 23 22 21.46 +13 32 32.2 V T08
2019-12-16 07:12:44 C 23 22 22.13 +13 32 35.0 V T08
2019-12-16 07:26:50 C 23 22 23.31 +13 32 39.8 V T08
2019-12-18 02:07:40 C 23 26 01.35 +13 47 51.2 U I41
2019-12-18 02:59:07 C 23 26 05.62 +13 48 09.8 U I41
2019-12-19 06:04:49 C 23 28 23.98 +13 57 53.4 V T08
2019-12-19 06:12:14 C 23 28 24.60 +13 57 55.9 V T08
2019-12-19 06:16:32 C 23 28 24.95 +13 57 57.4 V T08
2019-12-19 06:30:45 C 23 28 26.13 +13 58 02.5 V T08
2019-12-19 23:22:24 C 23 29 52.56 +14 04 03.2 q I15
2019-12-19 23:25:29 C 23 29 52.87 +14 04 03.9 q I15
2019-12-19 23:28:34 C 23 29 53.09 +14 04 05.3 q I15
2019-12-20 02:39:28 C 23 30 09.36 +14 05 15.2 V 703
2019-12-20 02:47:41 C 23 30 10.01 +14 05 18.5 V 703
2019-12-20 02:55:52 C 23 30 10.61 +14 05 21.3 V 703
2019-12-20 03:04:05 C 23 30 11.37 +14 05 23.6 V 703
2019-12-21 02:16:29 C 23 32 10.37 +14 13 45.1 U I41
2019-12-21 02:57:42 C 23 32 13.81 +14 13 59.8 U I41
2019-12-22 19:19:35 C 23 35 40.89 +14 28 34.8 V 160
2019-12-22 19:23:17 C 23 35 41.15 +14 28 35.9 V 160
2019-12-22 19:26:55 C 23 35 41.46 +14 28 37.3 V 160
2020-01-05 01:48:40 C 00 03 12.90 +16 26 30.8 V G96
2020-01-05 01:59:50 C 00 03 13.85 +16 26 35.0 V G96
2020-01-05 02:10:59 C 00 03 14.80 +16 26 39.3 V G96
2020-01-05 02:22:11 C 00 03 15.76 +16 26 43.5 V G96
2020-01-06 03:27:44 C 00 05 27.17 +16 36 11.9 V 703
2020-01-06 03:35:15 C 00 05 27.87 +16 36 15.2 V 703
2020-01-06 03:42:47 C 00 05 28.53 +16 36 18.1 V 703
2020-01-06 03:50:17 C 00 05 29.08 +16 36 19.7 V 703
2020-01-16 17:21:41 C 00 27 50.59 +18 13 02.2 V A16
2020-01-16 17:32:15 C 00 27 51.47 +18 13 06.1 V A16
2020-01-16 17:42:46 C 00 27 52.40 +18 13 10.3 V A16
2020-01-16 18:14:24 C 00 27 55.18 +18 13 22.3 V A16
2020-01-17 23:25:13 C 00 30 31.06 +18 24 35.3 q I15
2020-01-17 23:28:19 C 00 30 31.32 +18 24 36.2 q I15
2020-01-17 23:31:24 C 00 30 31.56 +18 24 37.7 q I15
2020-01-18 02:59:28 C 00 30 50.01 +18 25 59.1 V 703
2020-01-18 03:07:36 C 00 30 50.76 +18 26 01.5 V 703
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)