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
2020-01-18 03:15:44 C 00 30 51.52 +18 26 03.8 V 703
2020-01-18 03:23:53 C 00 30 52.23 +18 26 07.8 V 703
2020-01-19 06:14:21 C 00 33 15.96 +18 36 28.2 V T05
2020-01-19 06:19:05 C 00 33 16.39 +18 36 30.0 V T05
2020-01-19 06:26:28 C 00 33 17.02 +18 36 32.9 V T05
2020-01-23 02:18:23 C 00 41 31.63 +19 11 55.3 U I41
2020-01-23 03:58:08 C 00 41 40.51 +19 12 33.1 U I41
2020-01-24 02:45:56 C 00 43 43.90 +19 21 21.2 U I41
2020-01-24 02:47:16 C 00 43 44.00 +19 21 21.6 U I41
2020-01-24 03:41:53 C 00 43 48.88 +19 21 42.4 U I41
2020-01-24 03:43:12 C 00 43 48.99 +19 21 42.9 U I41
2020-01-25 02:27:27 C 00 45 52.30 +19 30 29.5 U I41
2020-01-25 02:52:11 C 00 45 54.51 +19 30 39.0 U I41
2020-01-25 05:59:02 C 00 46 11.31 +19 31 52.1 V T08
2020-01-25 06:04:21 C 00 46 11.79 +19 31 54.2 V T08
2020-01-25 06:12:21 C 00 46 12.49 +19 31 57.1 V T08
2020-01-25 06:17:04 C 00 46 12.96 +19 31 57.9 V T08
2020-01-25 06:27:50 C 00 46 13.88 +19 32 02.6 V T08
2020-01-26 03:03:48 C 00 48 05.80 +19 39 58.6 V 703
2020-01-26 03:11:58 C 00 48 06.54 +19 40 02.1 V 703
2020-01-26 03:20:09 C 00 48 07.25 +19 40 04.8 V 703
2020-01-26 03:28:20 C 00 48 07.98 +19 40 08.3 V 703
2020-01-27 05:52:21 C 00 50 31.68 +19 50 20.4 V T05
2020-01-27 05:57:03 C 00 50 32.10 +19 50 22.4 V T05
2020-01-27 06:05:10 C 00 50 32.79 +19 50 25.1 V T05
2020-01-27 06:19:56 C 00 50 34.19 +19 50 31.0 V T05
2020-01-29 02:48:38 C 00 54 37.05 +20 07 39.0 V 703
2020-01-29 02:56:55 C 00 54 37.85 +20 07 41.8 V 703
2020-01-29 03:05:11 C 00 54 38.57 +20 07 45.2 V 703
2020-01-29 03:13:26 C 00 54 39.30 +20 07 48.1 V 703
2020-01-29 03:23:41 C 00 54 40.20 +20 07 52.2 V 703
2020-01-29 03:31:57 C 00 54 40.89 +20 07 54.9 V 703
2020-01-29 03:40:14 C 00 54 41.70 +20 07 58.7 V 703
2020-01-29 03:48:29 C 00 54 42.47 +20 08 01.4 V 703
2020-02-05 03:05:56 C 01 10 04.05 +21 12 18.0 V 703
2020-02-05 03:13:31 C 01 10 04.74 +21 12 20.4 V 703
2020-02-05 03:21:07 C 01 10 05.43 +21 12 23.1 V 703
2020-02-05 03:28:42 C 01 10 06.17 +21 12 26.2 V 703
2020-02-18 02:49:40 C 01 39 18.01 +23 09 28.1 V 703
2020-02-18 03:06:00 C 01 39 19.60 +23 09 35.1 V 703
2020-02-18 03:14:10 C 01 39 20.44 +23 09 38.3 V 703
2020-02-20 05:52:49 C 01 44 10.39 +23 28 12.1 V T05
2020-02-20 05:56:56 C 01 44 10.76 +23 28 13.7 V T05
2020-02-20 06:04:56 C 01 44 11.54 +23 28 16.4 V T05
2020-02-20 06:19:44 C 01 44 12.95 +23 28 21.6 V T05
2020-02-26 02:28:24 C 01 57 43.48 +24 18 45.5 V 703
2020-02-26 02:36:36 C 01 57 44.23 +24 18 48.3 V 703
2020-02-26 02:44:49 C 01 57 44.98 +24 18 51.6 V 703
2020-02-26 02:53:01 C 01 57 45.80 +24 18 54.4 V 703
2020-02-26 05:42:43 C 01 58 02.28 +24 19 55.5 V 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)