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
2019-04-10 06:51:41 C 06 34 47.06 +23 53 45.4 V T05
2019-04-14 16:07:40 C 06 43 42.42 +22 40 24.1 q C97
2019-04-14 16:09:51 C 06 43 43.01 +22 40 18.9 q C97
2019-04-14 16:14:13 C 06 43 43.14 +22 40 17.8 q C97
2019-04-16 16:14:07 C 06 47 53.13 +22 06 13.2 q C97
2019-04-16 16:16:19 C 06 47 53.26 +22 06 12.4 q C97
2019-04-16 16:18:30 C 06 47 53.49 +22 06 10.5 q C97
2019-04-16 16:20:40 C 06 47 53.68 +22 06 09.5 q C97
2019-04-17 11:45:48 C 06 49 35.81 +21 52 14.1 q D29
2019-04-17 12:06:09 C 06 49 37.55 +21 51 59.0 q D29
2019-04-17 12:26:31 C 06 49 39.31 +21 51 44.3 q D29
2019-04-20 19:25:12 C 06 56 39.82 +20 54 20.6 t 240
2019-04-20 19:28:59 C 06 56 40.15 +20 54 17.8 t 240
2019-04-20 19:32:46 C 06 56 40.49 +20 54 15.0 t 240
2019-04-22 05:41:35 C 06 59 44.64 +20 29 06.8 V T05
2019-04-22 06:14:27 C 06 59 47.51 +20 28 42.1 V T05
2019-04-22 06:24:58 C 06 59 48.45 +20 28 34.2 V T05
2019-04-26 05:40:52 C 07 08 29.53 +19 16 39.9 V T05
2019-04-26 05:44:12 C 07 08 29.80 +19 16 37.6 V T05
2019-04-26 05:44:52 C 07 08 29.86 +19 16 36.9 V T05
2019-04-26 06:03:33 C 07 08 31.57 +19 16 22.7 V T05
2019-04-26 06:04:13 C 07 08 31.62 +19 16 22.3 V T05
2019-04-26 06:12:34 C 07 08 32.38 +19 16 15.8 V T05
2019-04-26 06:16:35 C 07 08 32.72 +19 16 12.6 V T05
2019-04-26 06:28:01 C 07 08 33.76 +19 16 03.7 V T05
2019-04-28 03:13:26 C 07 12 41.97 +18 41 24.8 V 703
2019-04-28 03:21:42 C 07 12 42.72 +18 41 18.3 V 703
2019-04-28 03:29:58 C 07 12 43.47 +18 41 11.7 V 703
2019-04-28 03:38:15 C 07 12 44.22 +18 41 05.2 V 703
2019-04-29 03:10:23 C 07 14 55.56 +18 22 39.5 V 703
2019-04-29 03:18:38 C 07 14 56.33 +18 22 33.1 V 703
2019-04-29 03:26:52 C 07 14 57.07 +18 22 26.6 V 703
2019-04-29 03:35:05 C 07 14 57.84 +18 22 19.7 V 703
2019-04-30 06:26:07 C 07 17 28.21 +18 01 08.1 V T05
2019-04-30 06:39:04 C 07 17 29.39 +18 00 57.7 V T05
2019-04-30 06:52:13 C 07 17 30.61 +18 00 47.4 V T05
2019-04-30 07:05:15 C 07 17 31.79 +18 00 36.9 V T05
2019-05-04 03:10:09 C 07 26 12.63 +16 46 06.5 V 703
2019-05-04 03:18:25 C 07 26 13.40 +16 45 59.3 V 703
2019-05-04 03:26:43 C 07 26 14.16 +16 45 52.5 V 703
2019-05-04 03:35:00 C 07 26 14.96 +16 45 45.7 V 703
2019-05-04 06:17:29 C 07 26 30.35 +16 43 33.9 V T05
2019-05-04 06:29:30 C 07 26 31.46 +16 43 24.3 V T05
2019-05-04 06:42:14 C 07 26 32.64 +16 43 12.9 V T05
2019-05-04 06:55:17 C 07 26 33.97 +16 43 02.7 V T05
2019-05-08 03:26:15 C 07 35 23.83 +15 25 18.4 V 703
2019-05-08 03:33:49 C 07 35 24.66 +15 25 12.5 V 703
2019-05-08 03:41:24 C 07 35 25.28 +15 25 05.3 V 703
2019-05-08 03:48:58 C 07 35 26.01 +15 24 58.7 V 703
2019-05-08 06:04:58 C 07 35 39.11 +15 23 04.8 V T05
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)