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
2021-12-25 05:13:54 S 12 37 09.482 +02 52 28.42 V C57
2021-12-25 05:13:54 s 1 -85673.927 0 +358595.64 9740.0 C57
2021-12-25 05:23:54 S 12 37 10.838 +02 52 15.82 V C57
2021-12-25 05:23:54 s 1 -86003.159 0 +358355.00 2330.0 C57
2021-12-25 05:33:54 S 12 37 11.935 +02 52 06.28 V C57
2021-12-25 05:33:54 s 1 -86332.148 0 +358113.35 3620.0 C57
2021-12-25 05:43:54 S 12 37 12.936 +02 51 52.81 V C57
2021-12-25 05:43:54 s 1 -86660.894 0 +357870.70 3600.0 C57
2021-12-25 06:33:54 S 12 37 18.948 +02 50 54.56 V C57
2021-12-25 06:33:54 s 1 -88300.920 0 +356642.38 3790.0 C57
2021-12-25 06:43:54 S 12 37 19.990 +02 50 45.71 V C57
2021-12-25 06:43:54 s 1 -88628.176 0 +356393.70 5850.0 C57
2021-12-25 06:53:54 S 12 37 21.312 +02 50 31.78 V C57
2021-12-25 06:53:54 s 1 -88955.180 0 +356144.01 6560.0 C57
2021-12-25 07:03:54 S 12 37 22.512 +02 50 19.36 V C57
2021-12-25 07:03:54 s 1 -89281.930 0 +355893.31 5920.0 C57
2021-12-25 07:13:54 S 12 37 23.700 +02 50 07.19 V C57
2021-12-25 07:13:54 s 1 -89608.425 0 +355641.60 3930.0 C57
2021-12-25 07:33:54 S 12 37 26.054 +02 49 43.97 V C57
2021-12-25 07:33:54 s 1 -90260.645 0 +355135.16 5880.0 C57
2021-12-25 07:43:54 S 12 37 27.319 +02 49 30.61 V C57
2021-12-25 07:43:54 s 1 -90586.368 0 +354880.42 9800.0 C57
2021-12-25 07:53:54 S 12 37 28.327 +02 49 20.93 V C57
2021-12-25 07:53:54 s 1 -90911.831 0 +354624.67 2350.0 C57
2021-12-25 08:03:54 S 12 37 29.750 +02 49 11.10 V C57
2021-12-25 08:03:54 s 1 -91237.033 0 +354367.92 3520.0 C57
2021-12-25 08:13:54 S 12 37 30.977 +02 48 56.59 V C57
2021-12-25 08:13:54 s 1 -91561.972 0 +354110.15 3300.0 C57
2021-12-25 08:23:54 S 12 37 32.021 +02 48 44.60 V C57
2021-12-25 08:23:54 s 1 -91886.647 0 +353851.37 1690.0 C57
2021-12-25 09:13:54 S 12 37 38.030 +02 47 42.43 V C57
2021-12-25 09:13:54 s 1 -93506.025 0 +352542.27 2600.0 C57
2021-12-25 09:23:54 S 12 37 39.326 +02 47 34.58 V C57
2021-12-25 09:23:54 s 1 -93829.091 0 +352277.41 2530.0 C57
2021-12-25 09:33:54 S 12 37 40.382 +02 47 21.70 V C57
2021-12-25 09:33:54 s 1 -94151.885 0 +352011.53 1020.0 C57
2021-12-25 09:53:54 S 12 37 42.689 +02 47 00.13 V C57
2021-12-25 09:53:54 s 1 -94796.650 0 +351476.73 3710.0 C57
2021-12-25 10:03:54 S 12 37 43.824 +02 46 48.14 V C57
2021-12-25 10:03:54 s 1 -95118.618 0 +351207.80 7880.0 C57
2021-12-25 10:13:54 S 12 37 45.014 +02 46 35.87 V C57
2021-12-25 10:13:54 s 1 -95440.309 0 +350937.86 610.0 C57
2021-12-25 10:23:54 S 12 37 46.121 +02 46 23.74 V C57
2021-12-25 10:23:54 s 1 -95761.720 0 +350666.90 1870.0 C57
2021-12-25 10:43:54 S 12 37 48.706 +02 45 57.49 V C57
2021-12-25 10:43:54 s 1 -96403.701 0 +350121.92 9990.0 C57
2021-12-25 11:13:54 S 12 37 52.075 +02 45 26.10 V C57
2021-12-25 11:13:54 s 1 -97364.545 0 +349296.81 6100.0 C57
2021-12-25 11:53:54 S 12 37 56.978 +02 44 35.63 V C57
2021-12-25 11:53:54 s 1 -98641.648 0 +348182.37 6630.0 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)