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
2021-11-22 03:43:56 S 11 09 58.344 +15 16 11.78 V C57
2021-11-22 03:43:56 s 1 +175884.17 6 +178773.00 5950.0 C57
2021-11-22 05:03:56 S 11 10 06.816 +15 15 10.87 V C57
2021-11-22 05:03:56 s 1 +175326.61 6 +184363.87 4810.0 C57
2021-11-22 05:53:56 S 11 10 12.034 +15 14 27.24 V C57
2021-11-22 05:53:56 s 1 +174932.18 4 +187810.31 7940.0 C57
2021-11-22 06:03:56 S 11 10 12.876 +15 14 18.46 V C57
2021-11-22 06:03:56 s 1 +174849.16 0 +188495.21 3720.0 C57
2021-11-22 06:13:56 S 11 10 14.263 +15 14 11.83 V C57
2021-11-22 06:13:56 s 1 +174764.77 3 +189178.64 4620.0 C57
2021-11-22 06:23:56 S 11 10 15.389 +15 14 01.79 V C57
2021-11-22 06:23:56 s 1 +174679.03 1 +189860.61 670.0 C57
2021-11-22 08:33:56 S 11 10 29.446 +15 12 27.58 V C57
2021-11-22 08:33:56 s 1 +173444.18 9 +198594.27 8610.0 C57
2021-11-22 09:03:56 S 11 10 32.662 +15 12 10.98 V C57
2021-11-22 09:03:56 s 1 +173128.43 9 +200575.15 7160.0 C57
2021-11-22 10:33:56 S 11 10 42.281 +15 10 59.74 V C57
2021-11-22 10:33:56 s 1 +172114.80 5 +206440.71 5390.0 C57
2021-11-22 10:43:56 S 11 10 43.668 +15 10 51.49 V C57
2021-11-22 10:43:56 s 1 +171996.16 5 +207085.35 3700.0 C57
2021-11-22 10:53:56 S 11 10 44.681 +15 10 43.39 V C57
2021-11-22 10:53:56 s 1 +171876.34 4 +207728.56 7790.0 C57
2021-11-22 11:03:56 S 11 10 45.470 +15 10 27.52 V C57
2021-11-22 11:03:56 s 1 +171755.34 8 +208370.37 7680.0 C57
2021-11-22 11:13:56 S 11 10 46.740 +15 10 25.93 V C57
2021-11-22 11:13:56 s 1 +171633.18 4 +209010.77 3400.0 C57
2021-11-22 11:43:56 S 11 10 50.090 +15 10 01.38 V C57
2021-11-22 11:43:56 s 1 +171259.73 2 +210923.51 5720.0 C57
2021-11-22 13:03:56 S 11 10 58.462 +15 09 03.89 V C57
2021-11-22 13:03:56 s 1 +170214.28 3 +215962.84 9420.0 C57
2021-11-22 13:13:56 S 11 10 59.765 +15 08 53.41 V C57
2021-11-22 13:13:56 s 1 +170078.50 2 +216586.43 7100.0 C57
2021-11-22 13:23:56 S 11 11 00.794 +15 08 43.84 V C57
2021-11-22 13:23:56 s 1 +169941.65 3 +217208.65 420.0 C57
2021-11-22 13:33:56 S 11 11 01.802 +15 08 37.46 V C57
2021-11-22 13:33:56 s 1 +169803.71 2 +217829.49 9850.0 C57
2021-11-22 13:43:56 S 11 11 02.714 +15 08 34.66 V C57
2021-11-22 13:43:56 s 1 +169664.68 4 +218448.94 5400.0 C57
2021-11-22 13:53:56 S 11 11 04.039 +15 08 21.52 V C57
2021-11-22 13:53:56 s 1 +169524.57 6 +219067.01 7100.0 C57
2021-11-22 15:53:56 S 11 11 16.781 +15 06 53.96 V C57
2021-11-22 15:53:56 s 1 +167760.83 0 +226376.50 3890.0 C57
2021-11-22 16:13:56 S 11 11 19.058 +15 06 34.74 V C57
2021-11-22 16:13:56 s 1 +167452.42 3 +227575.61 6930.0 C57
2021-11-22 16:23:56 S 11 11 20.066 +15 06 26.14 V C57
2021-11-22 16:23:56 s 1 +167296.70 8 +228173.12 3070.0 C57
2021-11-22 16:33:56 S 11 11 21.550 +15 06 18.29 V C57
2021-11-22 16:33:56 s 1 +167139.99 2 +228769.28 5650.0 C57
2021-11-22 16:43:56 S 11 11 22.274 +15 06 10.51 V C57
2021-11-22 16:43:56 s 1 +166982.28 0 +229364.08 4690.0 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)