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
2021-12-06 22:13:55 s 1 +134309.44 7 +308013.35 6310.0 C57
2021-12-06 22:23:55 S 11 47 26.743 +10 22 23.66 V C57
2021-12-06 22:23:55 s 1 +134048.53 7 +308421.12 7070.0 C57
2021-12-06 22:33:55 S 11 47 27.614 +10 22 13.91 V C57
2021-12-06 22:33:55 s 1 +133787.13 1 +308827.78 6050.0 C57
2021-12-07 00:03:55 S 11 47 37.879 +10 20 52.26 V C57
2021-12-07 00:03:55 s 1 +131412.50 3 +312437.48 8410.0 C57
2021-12-07 01:03:55 S 11 47 44.702 +10 19 55.67 V C57
2021-12-07 01:03:55 s 1 +129807.92 1 +314794.00 3360.0 C57
2021-12-07 01:13:55 S 11 47 45.377 +10 19 49.40 V C57
2021-12-07 01:13:55 s 1 +129538.85 5 +315182.88 5030.0 C57
2021-12-07 01:23:55 S 11 47 46.654 +10 19 37.56 V C57
2021-12-07 01:23:55 s 1 +129269.32 7 +315570.66 5060.0 C57
2021-12-07 01:33:55 S 11 47 47.482 +10 19 31.58 V C57
2021-12-07 01:33:55 s 1 +128999.33 8 +315957.35 3450.0 C57
2021-12-07 02:43:55 S 11 47 55.838 +10 18 26.21 V C57
2021-12-07 02:43:55 s 1 +127096.69 0 +318633.36 7040.0 C57
2021-12-07 02:53:55 S 11 47 56.638 +10 18 19.37 V C57
2021-12-07 02:53:55 s 1 +126823.08 7 +319011.26 2610.0 C57
2021-12-07 03:03:55 S 11 47 57.835 +10 18 06.19 V C57
2021-12-07 03:03:55 s 1 +126549.04 0 +319388.07 6610.0 C57
2021-12-07 03:13:55 S 11 47 58.709 +10 17 56.26 V C57
2021-12-07 03:13:55 s 1 +126274.55 2 +319763.79 9050.0 C57
2021-12-07 03:23:55 S 11 47 59.825 +10 17 49.34 V C57
2021-12-07 03:23:55 s 1 +125999.62 3 +320138.42 9940.0 C57
2021-12-07 03:33:55 S 11 48 00.967 +10 17 41.42 V C57
2021-12-07 03:33:55 s 1 +125724.25 7 +320511.96 9270.0 C57
2021-12-07 03:43:55 S 11 48 02.230 +10 17 32.06 V C57
2021-12-07 03:43:55 s 1 +125448.45 5 +320884.41 7060.0 C57
2021-12-07 03:53:55 S 11 48 03.115 +10 17 22.88 V C57
2021-12-07 03:53:55 s 1 +125172.21 8 +321255.77 3320.0 C57
2021-12-07 04:03:55 S 11 48 04.560 +10 17 07.73 V C57
2021-12-07 04:03:55 s 1 +124895.54 8 +321626.05 8050.0 C57
2021-12-07 05:43:55 S 11 48 15.317 +10 15 43.02 V C57
2021-12-07 05:43:55 s 1 +122105.44 5 +325269.17 2810.0 C57
2021-12-07 06:03:55 S 11 48 17.518 +10 15 21.64 V C57
2021-12-07 06:03:55 s 1 +121542.40 8 +325984.84 8100.0 C57
2021-12-07 06:13:55 S 11 48 18.751 +10 15 13.54 V C57
2021-12-07 06:13:55 s 1 +121260.27 4 +326341.06 3590.0 C57
2021-12-07 06:23:55 S 11 48 19.793 +10 15 02.77 V C57
2021-12-07 06:23:55 s 1 +120977.73 1 +326696.20 7640.0 C57
2021-12-07 06:33:55 S 11 48 20.923 +10 14 57.37 V C57
2021-12-07 06:33:55 s 1 +120694.78 2 +327050.27 260.0 C57
2021-12-07 06:43:55 S 11 48 21.809 +10 14 50.17 V C57
2021-12-07 06:43:55 s 1 +120411.42 8 +327403.26 1470.0 C57
2021-12-07 08:03:55 S 11 48 30.907 +10 13 36.62 V C57
2021-12-07 08:03:55 s 1 +118130.21 8 +330188.69 740.0 C57
2021-12-07 08:13:55 S 11 48 31.798 +10 13 22.40 V C57
2021-12-07 08:13:55 s 1 +117843.29 5 +330532.07 9460.0 C57
2021-12-07 08:23:55 S 11 48 33.084 +10 13 15.38 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)