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
2005-01-14 21:24:38 C 03 43 38.30 +44 13 23.1 r 240
2005-01-15 03:41:32 C 03 43 32.75 +44 08 40.5 c 704
2005-01-15 04:03:12 C 03 43 32.34 +44 08 23.1 c 704
2005-01-15 04:21:57 C 03 43 32.15 +44 08 08.3 c 704
2005-01-15 04:40:41 C 03 43 31.66 +44 07 50.6 c 704
2005-01-15 04:59:24 C 03 43 31.30 +44 07 38.8 c 704
2005-01-16 00:53:48 C 03 43 15.51 +43 52 25.9 o 084
2005-01-16 21:01:30 C 03 43 03.20 +43 37 25.4 c A53
2005-01-16 21:11:28 C 03 43 03.03 +43 37 18.4 c A53
2005-01-16 21:15:41 C 03 43 03.04 +43 37 14.7 c A53
2005-01-16 21:19:54 C 03 43 02.97 +43 37 11.5 c A53
2005-01-16 21:26:15 C 03 43 02.91 +43 37 06.8 c A53
2005-01-16 21:36:16 C 03 43 02.80 +43 36 59.5 c A53
2005-01-29 22:34:40 C 03 46 12.29 +40 04 29.0 o 084
2005-01-29 22:39:21 C 03 46 12.40 +40 04 25.7 o 084
2005-01-31 03:44:40 C 03 47 01.78 +39 47 05.8 c 704
2005-01-31 04:10:25 C 03 47 02.46 +39 46 50.7 c 704
2005-01-31 04:28:33 C 03 47 02.99 +39 46 39.2 c 704
2005-01-31 04:46:42 C 03 47 03.45 +39 46 28.1 c 704
2005-01-31 05:05:07 C 03 47 03.99 +39 46 17.8 c 704
2005-02-03 20:01:11 C 03 49 58.94 +38 56 25.0 o 084
2005-02-03 20:06:50 C 03 49 59.13 +38 56 21.8 o 084
2005-02-06 18:44:35 C 03 52 49.28 +38 18 25.8 c 113
2005-02-06 18:47:11 C 03 52 49.39 +38 18 24.6 c 113
2005-02-06 18:49:45 C 03 52 49.49 +38 18 23.2 c 113
2005-02-06 18:52:20 C 03 52 49.59 +38 18 21.8 c 113
2005-02-06 18:54:56 C 03 52 49.70 +38 18 20.5 c 113
2005-02-12 16:54:04 C 03 59 39.46 +37 08 19.3 o 084
2005-02-12 16:58:43 C 03 59 39.72 +37 08 17.1 o 084
2005-02-12 17:06:17 C 03 59 40.06 +37 08 12.7 o 084
2005-03-04 21:07:21 C 04 31 48.50 +33 58 01.2 o 084
2005-03-09 19:38:49 C 04 41 18.28 +33 18 42.9 o 084
2005-03-09 19:44:28 C 04 41 18.74 +33 18 41.2 o 084
2005-03-10 20:41:25 C 04 43 22.68 +33 10 36.0 o 084
2005-03-10 20:47:06 C 04 43 23.16 +33 10 34.1 o 084
2005-03-13 02:08:00 C 04 47 52.77 +32 53 31.9 r H45
2005-03-13 02:11:12 C 04 47 53.02 +32 53 29.8 r H45
2005-03-13 02:13:56 C 04 47 53.29 +32 53 29.8 r H45
2005-03-13 02:16:28 C 04 47 53.54 +32 53 29.7 r H45
2005-03-14 19:46:55 C 04 51 27.46 +32 40 15.1 o 084
2005-03-14 19:52:36 C 04 51 27.97 +32 40 13.4 o 084
2005-03-30 18:59:36 C 05 26 47.89 +30 38 35.9 o 084
2005-03-30 19:05:16 C 05 26 48.44 +30 38 33.8 o 084
2005-04-24 21:09:49 C 06 29 12.62 +26 51 59.2 o A32
2005-09-14 09:06:16 C 15 06 14.40 -26 20 44.4 r E12
2005-09-14 09:20:34 C 15 06 18.10 -26 20 50.6 r E12
2005-09-14 09:34:50 C 15 06 21.85 -26 20 56.7 r E12
2005-09-14 09:49:07 C 15 06 25.63 -26 21 02.7 r E12
2005-11-21 01:30:48 C 21 02 47.18 -08 45 52.9 r 703
2005-11-21 01:38:23 C 21 02 48.26 -08 45 44.5 r 703
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)