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
2020-02-26 05:47:21 C 01 58 02.73 +24 19 57.1 V T08
2020-02-26 05:55:21 C 01 58 03.50 +24 19 59.7 V T08
2020-02-26 06:10:00 C 01 58 04.90 +24 20 04.7 V T08
2020-02-29 02:55:43 C 02 04 47.05 +24 44 12.4 V V00
2020-02-29 03:07:45 C 02 04 48.23 +24 44 16.6 V V00
2020-02-29 03:08:31 C 02 04 48.28 +24 44 16.5 V V00
2020-02-29 03:16:53 C 02 04 49.12 +24 44 19.6 V V00
2020-02-29 03:17:39 C 02 04 49.19 +24 44 19.9 V V00
2020-02-29 03:26:00 C 02 04 50.01 +24 44 22.7 V V00
2020-02-29 03:26:46 C 02 04 50.08 +24 44 23.0 V V00
2020-03-05 02:33:16 C 02 16 33.44 +25 25 08.9 V 703
2020-03-05 02:41:34 C 02 16 34.27 +25 25 11.8 V 703
2020-03-05 02:49:54 C 02 16 35.03 +25 25 13.6 V 703
2020-03-05 02:50:38 C 02 16 35.17 +25 25 14.1 V G96
2020-03-05 02:58:12 C 02 16 35.93 +25 25 17.3 V 703
2020-03-05 03:01:14 C 02 16 36.24 +25 25 17.7 V G96
2020-03-05 03:07:24 C 02 16 36.82 +25 25 19.5 V G96
2020-03-05 03:13:33 C 02 16 37.43 +25 25 21.7 V G96
2020-04-15 03:19:59 C 03 59 22.29 +29 44 17.7 U I41
2020-04-15 03:27:10 C 03 59 23.05 +29 44 18.8 U I41
2020-04-15 03:29:18 C 03 59 23.33 +29 44 19.1 U I41
2020-04-15 03:34:20 C 03 59 23.85 +29 44 19.7 U I41
2020-04-15 03:36:27 C 03 59 24.09 +29 44 20.3 U I41
2020-04-15 03:42:51 C 03 59 24.79 +29 44 21.4 U I41
2020-04-17 03:16:49 C 04 04 39.03 +29 52 11.5 U I41
2020-04-17 03:23:17 C 04 04 39.73 +29 52 12.5 U I41
2020-04-17 03:29:44 C 04 04 40.44 +29 52 13.5 U I41
2020-04-17 03:35:24 C 04 04 41.07 +29 52 14.4 U I41
2021-08-01 11:58:03 C 06 20 17.91 +32 36 22.3 U I41
2021-08-02 11:43:42 C 06 23 00.79 +32 36 02.4 U I41
2021-08-02 11:47:05 C 06 23 01.16 +32 36 02.5 U I41
2021-08-02 11:50:29 C 06 23 01.55 +32 36 02.4 U I41
2021-08-02 11:53:52 C 06 23 01.94 +32 36 02.4 U I41
2021-08-02 11:57:16 C 06 23 02.33 +32 36 02.4 U I41
2021-08-03 11:44:45 C 06 25 45.33 +32 35 32.2 U I41
2021-08-03 11:47:30 C 06 25 45.65 +32 35 32.2 U I41
2021-08-03 11:51:00 C 06 25 46.03 +32 35 32.2 U I41
2021-08-03 11:54:30 C 06 25 46.46 +32 35 32.0 U I41
2021-08-03 11:57:59 C 06 25 46.87 +32 35 31.7 U I41
2021-08-04 11:47:42 C 06 28 30.00 +32 34 51.3 U I41
2021-08-04 11:51:12 C 06 28 30.40 +32 34 51.3 U I41
2021-08-04 11:54:41 C 06 28 30.80 +32 34 51.3 U I41
2021-08-04 11:58:11 C 06 28 31.21 +32 34 51.2 U I41
2021-08-09 11:50:45 C 06 42 10.33 +32 28 51.2 U I41
2021-08-09 11:54:11 C 06 42 10.72 +32 28 51.0 U I41
2021-08-09 11:57:39 C 06 42 11.12 +32 28 50.8 U I41
2021-08-09 12:01:05 C 06 42 11.50 +32 28 50.7 U I41
2021-08-09 12:04:32 C 06 42 11.90 +32 28 50.4 U I41
2021-08-10 11:52:03 C 06 44 54.09 +32 27 08.1 U I41
2021-08-10 11:55:31 C 06 44 54.48 +32 27 07.8 U I41
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)