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
1994-10-14 11:08:41 A 21 56 38.82 +12 42 07.4 z 381
1994-10-14 11:18:24 A 21 56 39.26 +12 42 08.6 z 381
1994-10-16 21:39:57 C 21 59 29.34 +12 48 22.5 606
1994-10-21 22:05:52 C 22 05 41.23 +12 59 43.5 606
1994-10-23 19:16:57 C 22 08 08.06 +13 03 39.8 z 970
1994-10-23 19:26:30 C 22 08 08.57 +13 03 40.9 z 970
1994-10-23 19:35:15 C 22 08 09.02 +13 03 41.8 z 970
1994-10-26 08:24:16 C 22 11 30.57 +13 08 59.1 c 608
1994-10-26 09:10:17 C 22 11 33.01 +13 09 02.5 c 608
1994-10-28 09:13:29 C 22 14 17.02 +13 13 06.0 c 608
1994-10-28 10:28:47 C 22 14 21.14 +13 13 11.3 c 608
1994-10-30 23:55:05 C 22 17 57.39 +13 18 25.3 z 801
1994-11-02 20:44:34 C 22 22 05.06 +13 24 34.4 606
1994-11-04 23:11:36 C 22 25 11.89 +13 29 26.7 z 801
1994-11-04 23:33:05 C 22 25 13.16 +13 29 28.5 z 801
1994-11-28 02:45:14 23 02 51.81 +14 45 26.4 18.8 675
1994-11-28 03:40:30 23 02 55.59 +14 45 38.7 17.8 675
1994-11-29 03:10:15 23 04 38.31 +14 49 52.9 17.8 675
1994-11-29 14:19:59 C 23 05 27.01 +14 51 58.7 z 220
1994-11-29 14:44:30 C 23 05 28.57 +14 52 02.5 z 220
1994-11-29 15:35:59 C 23 05 32.53 +14 52 12.0 z 220
1994-11-30 02:48:45 23 06 22.03 +14 54 15.2 675
1997-01-17 03:49:39 C 14 17 54.80 -14 19 54.4 z 046
1997-01-17 03:51:20 C 14 17 55.09 -14 19 57.2 z 046
1997-01-17 03:53:03 C 14 17 55.40 -14 20 00.0 z 046
1997-09-12 03:02:32 C 05 00 53.07 +38 30 44.7 z 118
1997-09-12 03:07:43 C 05 00 53.39 +38 30 47.8 z 118
1997-09-25 03:08:28 C 05 17 24.97 +41 36 18.3 z 046
1997-09-25 03:10:34 C 05 17 25.03 +41 36 19.4 z 046
1997-09-25 03:13:02 C 05 17 25.17 +41 36 21.1 z 046
1997-11-05 00:46:12 C 05 04 34.04 +51 31 02.2 046
1997-11-05 00:49:28 C 05 04 33.77 +51 31 03.7 046
1997-11-05 00:54:38 C 05 04 33.28 +51 31 06.3 046
1997-11-09 17:40:30 C 04 53 28.18 +52 17 33.6 360
1997-11-09 17:46:00 C 04 53 27.56 +52 17 35.6 360
1997-11-21 22:17:30 C 04 16 44.27 +53 02 51.0 z 967
1997-11-21 22:27:59 C 04 16 42.78 +53 02 50.4 z 967
1997-11-21 22:36:00 C 04 16 41.65 +53 02 51.0 z 967
1997-11-21 22:43:59 C 04 16 40.52 +53 02 49.2 z 967
1997-11-21 22:54:00 C 04 16 39.16 +53 02 48.8 z 967
1997-11-21 23:01:00 C 04 16 38.18 +53 02 48.7 z 967
1998-01-10 18:37:41 C 02 51 07.51 +40 45 58.1 046
1998-01-10 18:42:41 C 02 51 07.56 +40 45 54.9 046
1998-01-10 18:50:11 C 02 51 07.64 +40 45 50.3 046
1998-01-12 19:55:48 C 02 51 52.75 +40 15 31.4 046
1998-01-12 19:58:35 C 02 51 52.80 +40 15 29.7 046
1998-01-12 20:03:06 C 02 51 52.86 +40 15 27.1 046
1998-01-27 19:27:41 C 03 03 55.06 +37 11 37.8 z 118
1998-01-27 19:44:12 C 03 03 55.75 +37 11 31.1 z 118
1998-02-08 19:41:24 C 03 20 01.69 +35 27 20.2 046
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)