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
1969-10-13 18:24:11 A 21 41 33.50 +09 28 24.7 095
1969-10-13 18:30:10 A 21 41 33.96 +09 28 26.4 095
1969-10-13 19:24:09 A 21 41 47.04 +09 24 05.0 020
1969-10-13 19:45:05 A 21 41 47.51 +09 24 10.3 020
1969-10-16 02:24:35 A 21 45 52 +09 08.3 774
1969-10-16 19:24:20 A 21 46 22.12 +09 49 41.0 095
1969-10-16 19:54:33 A 21 46 24.03 +09 49 49.0 095
1969-10-17 18:26:00 A 21 47 53.64 +09 55 57.8 119
1969-10-17 18:42:59 A 21 47 54.69 +09 56 01.3 119
1969-10-17 19:14:00 A 21 47 56.59 +09 56 10.0 119
1969-10-17 19:43:30 A 21 47 58.42 +09 56 17.3 095
1969-10-17 19:53:24 A 21 47 59.04 +09 56 18.1 095
1969-10-17 20:24:59 A 21 48 01.22 +09 56 29.3 119
1969-11-08 01:59:59 A 22 22 48.43 +11 46 40.4 693
1969-11-08 02:14:00 A 22 22 49.40 +11 46 43.4 693
1972-02-12 11:51:19 A 16 30 16.51 -30 12 57.1 695
1972-02-12 12:01:35 A 16 30 19.27 -30 13 11.1 695
1972-08-15 11:01:59 A 04 10 29.43 +31 48 13.2 695
1972-08-15 11:22:30 A 04 10 31.09 +31 48 26.3 695
1972-10-09 09:42:59 A 05 23 42.04 +45 18 55.4 693
1972-10-09 10:16:00 A 05 23 42.14 +45 19 17.0 693
1972-11-05 10:25:59 A 04 57 10.11 +51 42 39.9 693
1972-11-05 11:03:00 A 04 57 06.35 +51 42 55.7 693
1973-01-03 01:28:49 A 02 46 57.73 +42 23 13.4 A 801
1976-01-31 03:50:17 A 08 37 45.96 +41 37 29.6 A 801
1976-02-05 04:32:45 A 08 17 54.09 +41 05 28.8 A 801
1976-02-20 22:32:58 A 07 20 51.66 +36 08 10.5 15.5 026
1976-02-24 01:25:39 A 07 12 13.67 +34 42 31.3 A 801
1976-02-26 23:41:59 A 07 05 07.38 +33 17 24.9 15.5 026
1976-03-08 02:17:58 A 06 48 08.54 +28 07 04.5 A 801
1976-09-28 13:07:59 A 00 58 53.17 +37 13 01.4 16.0 882
1976-09-28 13:18:59 A 00 58 51.29 +37 13 01.1 882
1983-01-09 09:57:33 A 11 26 14.36 +21 33 27.8 A 801
1983-01-18 10:38:29 A 11 34 09.26 +20 22 43.6 A 801
1983-02-10 15:51:44 A 11 34 18.51 +15 15 26.0 C 330
1983-02-11 00:44:24 A 11 33 55.31 +15 07 07.6 095
1983-02-11 09:06:00 11 33 34.13 +14 59 16.5 14.5 675
1983-02-11 09:18:01 A 11 33 32.12 +14 59 02.4 A 801
1983-02-11 09:38:00 11 33 32.46 +14 58 46.2 675
1983-02-12 06:18:54 A 11 32 36.34 +14 38 30.0 z 704
1983-02-13 22:39:59 A 11 30 26.31 +13 54 54.0 489
1983-02-14 16:02:40 A 11 29 23.12 +13 35 02.9 C 330
1983-02-15 02:10:01 A 11 28 42.12 +13 22 45.1 095
1983-02-15 06:31:59 A 11 28 27.45 +13 17 29.5 675
1983-02-15 07:12:59 A 11 28 24.40 +13 16 40.9 675
1983-02-16 23:28:30 A 11 25 29.65 +12 23 48.3 489
1983-02-16 23:41:29 A 11 25 28.56 +12 23 31.6 489
1983-02-19 08:39:00 A 11 20 31.10 +10 57 47.3 688
1983-02-19 09:22:59 A 11 20 26.52 +10 56 37.1 688
1983-02-20 06:31:20 A 11 18 20.04 +10 20 43.1 A 801
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)