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
2021-11-27 13:13:56 s 1 -49159.113 0 +368767.71 4340.0 C57
2021-11-27 13:23:55 S 11 23 37.788 +13 34 03.11 V C57
2021-11-27 13:23:55 s 1 -49504.230 0 +368607.87 8060.0 C57
2021-11-27 13:33:56 S 11 23 39.055 +13 33 57.46 V C57
2021-11-27 13:33:56 s 1 -49849.203 0 +368447.01 1040.0 C57
2021-11-27 13:43:56 S 11 23 40.176 +13 33 45.54 V C57
2021-11-27 13:43:56 s 1 -50194.030 0 +368285.12 3300.0 C57
2021-11-27 13:53:56 S 11 23 41.150 +13 33 36.90 V C57
2021-11-27 13:53:56 s 1 -50538.709 0 +368122.20 4800.0 C57
2021-11-27 14:03:56 S 11 23 42.298 +13 33 36.04 V C57
2021-11-27 14:03:56 s 1 -50883.241 0 +367958.26 5570.0 C57
2021-11-27 14:13:55 S 11 23 43.560 +13 33 24.48 V C57
2021-11-27 14:13:55 s 1 -51227.623 0 +367793.29 5580.0 C57
2021-11-27 15:43:55 S 11 23 52.397 +13 32 13.27 V C57
2021-11-27 15:43:55 s 1 -54320.170 0 +366262.30 1150.0 C57
2021-11-27 15:53:56 S 11 23 53.465 +13 31 57.11 V C57
2021-11-27 15:53:56 s 1 -54663.000 0 +366087.04 3410.0 C57
2021-11-27 16:03:55 S 11 23 54.449 +13 31 51.64 V C57
2021-11-27 16:03:55 s 1 -55005.669 0 +365910.75 4870.0 C57
2021-11-27 16:13:56 S 11 23 55.764 +13 31 45.70 V C57
2021-11-27 16:13:56 s 1 -55348.175 0 +365733.43 5530.0 C57
2021-11-27 16:23:55 S 11 23 56.513 +13 31 36.16 V C57
2021-11-27 16:23:55 s 1 -55690.518 0 +365555.07 5370.0 C57
2021-11-27 16:33:56 S 11 23 57.842 +13 31 28.67 V C57
2021-11-27 16:33:56 s 1 -56032.695 0 +365375.69 4410.0 C57
2021-11-27 16:43:56 S 11 23 58.656 +13 31 17.72 V C57
2021-11-27 16:43:56 s 1 -56374.707 0 +365195.27 2620.0 C57
2021-11-27 17:03:56 S 11 24 00.958 +13 31 03.76 V C57
2021-11-27 17:03:56 s 1 -57058.230 0 +364831.33 6580.0 C57
2021-11-27 18:13:56 S 11 24 07.994 +13 30 03.28 V C57
2021-11-27 18:13:56 s 1 -59445.168 0 +363524.92 9020.0 C57
2021-11-27 18:23:55 S 11 24 09.031 +13 29 57.52 V C57
2021-11-27 18:23:55 s 1 -59785.459 0 +363334.14 8810.0 C57
2021-11-27 18:43:55 S 11 24 11.172 +13 29 44.84 V C57
2021-11-27 18:43:55 s 1 -60465.506 0 +362949.47 5780.0 C57
2021-11-27 18:53:56 S 11 24 11.777 +13 29 34.58 V C57
2021-11-27 18:53:56 s 1 -60805.259 0 +362755.58 2950.0 C57
2021-11-27 19:03:55 S 11 24 12.960 +13 29 23.75 V C57
2021-11-27 19:03:55 s 1 -61144.830 0 +362560.65 9240.0 C57
2021-11-27 19:13:56 S 11 24 14.378 +13 29 19.28 V C57
2021-11-27 19:13:56 s 1 -61484.219 0 +362364.67 4640.0 C57
2021-11-27 19:33:56 S 11 24 16.068 +13 29 00.92 V C57
2021-11-27 19:33:56 s 1 -62162.442 0 +361969.61 2770.0 C57
2021-11-27 21:13:56 S 11 24 26.424 +13 27 42.34 V C57
2021-11-27 21:13:56 s 1 -65542.181 0 +359931.69 8610.0 C57
2021-11-27 21:23:55 S 11 24 27.619 +13 27 31.43 V C57
2021-11-27 21:23:55 s 1 -65879.084 0 +359722.15 2050.0 C57
2021-11-27 21:33:56 S 11 24 28.687 +13 27 27.11 V C57
2021-11-27 21:33:56 s 1 -66215.788 0 +359511.56 4550.0 C57
2021-11-27 21:43:55 S 11 24 29.489 +13 27 11.88 V C57
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)