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
2025-11-30 12:59:12 C 09 16 25.714 +38 04 27.59 V T05
2025-11-30 12:59:51 C 09 16 25.704 +38 04 27.95 V T05
2025-11-30 13:07:43 C 09 16 25.920 +38 04 29.50 V T05
2025-11-30 13:31:55 C 09 16 26.656 +38 04 36.11 X F52
2025-11-30 13:48:47 C 09 16 27.150 +38 04 40.44 X F52
2025-11-30 14:05:27 C 09 16 27.636 +38 04 44.65 X F52
2025-12-01 12:43:04 C 09 17 10.622 +38 10 26.58 V T05
2025-12-01 12:47:12 C 09 17 10.759 +38 10 27.77 V T05
2025-12-01 12:54:38 C 09 17 10.954 +38 10 29.78 V T05
2025-12-01 13:04:47 C 09 17 11.222 +38 10 32.41 V T05
2025-12-02 12:19:12 C 09 17 52.589 +38 16 36.16 V T08
2025-12-02 12:21:50 C 09 17 52.666 +38 16 36.98 V T08
2025-12-02 12:32:31 C 09 17 52.930 +38 16 39.90 V T08
2025-12-02 13:00:51 C 09 17 53.638 +38 16 47.68 V T08
2025-12-02 20:26:23 C 09 18 06.162 +38 18 43.97 W O18
2025-12-02 20:29:32 C 09 18 06.231 +38 18 44.88 W O18
2025-12-03 02:11:18 C 09 18 15.974 +38 20 17.99 V R17
2025-12-03 02:31:41 C 09 18 16.495 +38 20 23.24 V R17
2025-12-03 02:52:03 C 09 18 16.990 +38 20 29.22 V R17
2025-12-03 03:12:26 C 09 18 17.486 +38 20 35.23 V R17
2025-12-03 14:26:40 C 09 18 35.216 +38 23 42.01 X F52
2025-12-03 14:49:10 C 09 18 35.731 +38 23 48.31 X F52
2025-12-03 15:12:13 C 09 18 36.257 +38 23 54.62 X F52
2025-12-03 15:34:29 C 09 18 36.762 +38 24 00.70 X F52
2025-12-04 13:46:26 C 09 19 10.733 +38 30 15.16 V T05
2025-12-04 13:49:12 C 09 19 10.783 +38 30 15.95 V T05
2025-12-04 14:26:37 C 09 19 11.609 +38 30 27.58 V T05
2025-12-04 14:37:37 C 09 19 11.789 +38 30 30.20 V T05
2025-12-06 12:25:45 C 09 20 12.748 +38 44 00.15 X F52
2025-12-06 12:45:29 C 09 20 13.074 +38 44 06.44 X F52
2025-12-06 12:46:56 C 09 20 13.097 +38 44 06.98 X F51
2025-12-06 12:49:16 C 09 20 13.142 +38 44 07.73 V T05
2025-12-06 12:53:10 C 09 20 13.210 +38 44 08.88 V T05
2025-12-06 12:57:44 C 09 20 13.267 +38 44 10.46 V T05
2025-12-06 12:59:48 C 09 20 13.316 +38 44 11.04 X F51
2025-12-06 13:05:15 C 09 20 13.405 +38 44 12.75 X F52
2025-12-06 13:05:37 C 09 20 13.414 +38 44 12.88 V T05
2025-12-06 13:12:41 C 09 20 13.525 +38 44 15.07 X F51
2025-12-09 13:48:24 C 09 21 23.664 +39 07 29.75 V T08
2025-12-09 14:20:30 C 09 21 23.962 +39 07 40.94 V T08
2025-12-09 15:01:50 C 09 21 24.293 +39 07 54.37 V T08
2025-12-09 15:37:35 C 09 21 24.610 +39 08 06.25 V T08
2025-12-10 12:25:15 C 09 21 39.098 +39 15 10.26 V T08
2025-12-10 12:29:16 C 09 21 39.122 +39 15 11.59 V T08
2025-12-10 12:38:31 C 09 21 39.185 +39 15 14.83 V T08
2025-12-10 12:54:45 C 09 21 39.295 +39 15 20.63 V T08
2025-12-11 11:04:08 C 09 21 51.134 +39 23 03.66 V T08
2025-12-11 11:08:44 C 09 21 51.144 +39 23 05.14 V T08
2025-12-11 11:42:04 C 09 21 51.271 +39 23 17.70 V T08
2025-12-11 12:00:35 C 09 21 51.353 +39 23 24.61 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)