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
2021-12-08 08:23:55 s 1 +72860.126 0 +369407.86 3060.0 C57
2021-12-08 08:33:55 S 11 51 12.912 +09 50 58.99 V C57
2021-12-08 08:33:55 s 1 +72531.211 0 +369602.87 1470.0 C57
2021-12-08 08:43:55 S 11 51 14.244 +09 50 50.06 V C57
2021-12-08 08:43:55 s 1 +72202.096 0 +369796.91 9270.0 C57
2021-12-08 10:03:55 S 11 51 23.119 +09 49 36.12 V C57
2021-12-08 10:03:55 s 1 +69562.146 0 +371314.07 220.0 C57
2021-12-08 10:13:55 S 11 51 23.666 +09 49 24.28 V C57
2021-12-08 10:13:55 s 1 +69231.288 0 +371499.34 2720.0 C57
2021-12-08 10:23:55 S 11 51 24.720 +09 49 10.42 V C57
2021-12-08 10:23:55 s 1 +68900.242 0 +371683.63 4650.0 C57
2021-12-08 10:33:55 S 11 51 26.064 +09 49 03.61 V C57
2021-12-08 10:33:55 s 1 +68569.009 0 +371866.95 6010.0 C57
2021-12-08 10:43:55 S 11 51 27.214 +09 48 56.99 V C57
2021-12-08 10:43:55 s 1 +68237.589 0 +372049.30 6820.0 C57
2021-12-08 10:52:02 C 11 50 56.81 +09 48 35.1 V 703
2021-12-08 10:53:55 S 11 51 28.387 +09 48 44.82 V C57
2021-12-08 10:53:55 s 1 +67905.985 0 +372230.67 7060.0 C57
2021-12-08 10:59:36 C 11 50 57.62 +09 48 28.3 V 703
2021-12-08 11:03:55 S 11 51 29.076 +09 48 37.30 V C57
2021-12-08 11:03:55 s 1 +67574.195 0 +372411.08 6760.0 C57
2021-12-08 11:07:11 C 11 50 58.43 +09 48 21.4 V 703
2021-12-08 11:13:55 S 11 51 30.542 +09 48 26.28 V C57
2021-12-08 11:13:55 s 1 +67242.223 0 +372590.51 5910.0 C57
2021-12-08 11:14:45 C 11 50 59.24 +09 48 14.3 V 703
2021-12-08 11:23:55 S 11 51 31.610 +09 48 16.45 V C57
2021-12-08 11:23:55 s 1 +66910.068 0 +372768.98 4520.0 C57
2021-12-08 11:33:55 S 11 51 32.570 +09 48 07.99 V C57
2021-12-08 11:33:55 s 1 +66577.732 0 +372946.47 2580.0 C57
2021-12-08 12:23:55 S 11 51 38.330 +09 47 21.70 V C57
2021-12-08 12:23:55 s 1 +64913.370 0 +373819.42 4970.0 C57
2021-12-08 12:43:55 S 11 51 40.210 +09 47 08.16 V C57
2021-12-08 12:43:55 s 1 +64246.392 0 +374161.82 4290.0 C57
2021-12-08 12:53:55 S 11 51 41.590 +09 46 53.94 V C57
2021-12-08 12:53:55 s 1 +63912.643 0 +374331.57 8180.0 C57
2021-12-08 13:03:55 S 11 51 42.502 +09 46 46.52 V C57
2021-12-08 13:03:55 s 1 +63578.722 0 +374500.35 1580.0 C57
2021-12-08 13:13:55 S 11 51 43.541 +09 46 37.31 V C57
2021-12-08 13:13:55 s 1 +63244.630 0 +374668.17 4480.0 C57
2021-12-08 13:23:55 S 11 51 44.786 +09 46 26.33 V C57
2021-12-08 13:23:55 s 1 +62910.368 0 +374835.02 6880.0 C57
2021-12-08 13:33:55 S 11 51 45.830 +09 46 21.36 V C57
2021-12-08 13:33:55 s 1 +62575.937 0 +375000.91 8790.0 C57
2021-12-08 13:43:55 S 11 51 46.838 +09 46 09.55 V C57
2021-12-08 13:43:55 s 1 +62241.337 0 +375165.83 210.0 C57
2021-12-08 13:53:55 S 11 51 47.791 +09 46 02.17 V C57
2021-12-08 13:53:55 s 1 +61906.571 0 +375329.79 1150.0 C57
2021-12-08 14:03:55 S 11 51 49.198 +09 45 49.36 V C57
2021-12-08 14:03:55 s 1 +61571.639 0 +375492.78 1620.0 C57
2021-12-08 14:13:55 S 11 51 50.040 +09 45 36.94 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)