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
1994-04-06 19:14:12 C 06 35 33.79 +22 57 37.2 z 587
1994-04-08 02:55:32 06 37 52.31 +22 32 59.4 711
1994-04-09 00:25:05 C 06 39 27.55 +22 16 08.9 z 801
1994-04-09 00:44:07 C 06 39 28.87 +22 15 54.7 z 801
1994-04-10 02:34:32 06 41 24.58 +21 55 41.9 711
1994-04-11 02:29:32 06 43 12.78 +21 36 52.1 711
1994-04-11 04:05:30 A 06 43 19.95 +21 35 36.0 675
1994-04-15 00:55:26 C 06 50 29.64 +20 21 42.7 z 801
1994-04-15 01:15:27 C 06 50 31.28 +20 21 25.3 z 801
1994-04-21 04:13:01 C 07 02 17.23 +18 21 19.1 711
1994-04-22 03:43:36 C 07 04 12.73 +18 01 40.8 711
1994-04-22 03:55:46 C 07 04 13.71 +18 01 30.4 711
1994-05-01 08:43:16 C 07 22 39.65 +14 50 04.1 413
1994-05-01 08:46:22 C 07 22 39.89 +14 50 01.4 413
1994-05-01 08:49:14 C 07 22 40.13 +14 49 58.8 413
1994-05-02 08:18:35 C 07 24 39.56 +14 28 45.1 413
1994-05-02 08:21:07 C 07 24 39.77 +14 28 42.8 413
1994-05-03 03:00:32 C 07 26 14.48 +14 11 30.0 711
1994-05-04 09:41:29 C 07 28 51.03 +13 43 32.1 413
1994-05-04 09:44:41 C 07 28 51.30 +13 43 29.1 413
1994-06-17 08:55:53 C 08 52 27.61 -05 43 49.6 413
1994-06-17 08:59:08 C 08 52 27.81 -05 43 53.8 413
1994-06-18 08:41:40 C 08 53 58.15 -06 13 47.6 413
1994-06-18 08:44:07 C 08 53 58.29 -06 13 50.7 413
1994-06-19 08:31:25 C 08 55 27.31 -06 43 54.7 413
1994-06-19 08:34:45 C 08 55 27.50 -06 43 59.1 413
1994-06-20 08:29:23 C 08 56 55.17 -07 14 17.7 413
1994-06-20 08:33:14 C 08 56 55.40 -07 14 22.4 413
1994-07-12 07:02:40 09 20 51.14 -18 25 27.2 474
1994-07-12 07:30:50 09 20 51.83 -18 26 02.6 474
1994-07-12 08:19:34 09 20 53.36 -18 27 02.3 474
1994-07-25 08:43:21 C 09 27 15.81 -25 13 21.5 413
1994-07-25 08:46:20 C 09 27 15.84 -25 13 25.5 413
1994-07-25 08:49:38 C 09 27 15.90 -25 13 30.0 413
1994-07-31 07:40:11 09 28 33.80 -28 42 24.0 474
1994-07-31 08:08:26 09 28 34.27 -28 43 05.2 474
1994-08-06 07:16:28 09 29 16.45 -33 05 25.1 474
1994-08-10 07:23:31 09 29 37.54 -37 10 04.6 474
1994-08-10 07:39:00 09 29 37.65 -37 10 50.7 474
1994-08-15 08:51:59 C 09 30 13.61 -45 32 24.8 413
1994-08-15 08:54:22 C 09 30 13.64 -45 32 38.1 413
1994-08-15 08:56:35 C 09 30 13.69 -45 32 49.6 413
1994-08-16 07:45:00 09 30 27.21 -47 52 47.8 474
1994-08-16 07:59:00 09 30 27.50 -47 54 18.5 474
1994-08-16 08:40:50 C 09 30 25.84 -47 59 20.4 413
1994-08-16 08:44:15 C 09 30 25.86 -47 59 41.9 413
1994-08-16 08:46:33 C 09 30 25.91 -47 59 56.2 413
1994-08-16 19:46:38 C 09 30 54.89 -49 16 31.4 413
1994-08-16 19:48:51 C 09 30 54.96 -49 16 48.2 413
1994-08-16 19:51:27 C 09 30 54.95 -49 17 07.8 413
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)