162173 Ryugu (1999 JU3)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1910626253 ± 2.00e+00
Semi-major axis (a)1.1909211747 AU ± 3.00e+00
Inclination (i)5.86654965° ± 4.00e+00
Long. of Asc. Node (Ω)251.29160345° ± 5.00e+00
Arg. of Perihelion (ω)211.61670373° ± 6.00e+00
Mean Anomaly (M)270.65926628° ± 7.56e-06
Mean Motion (n)0.7583815353°/day ± 2.87e+00
Perihelion dist (q)0.96338065 AU ± 3.40e+00
Aphelion dist (Q)1.41846170 AU ± 4.29e+00
Orbital Period1.29964436 yr ± 4.91e+00
NGA Modelr2
A21.49982929e-05 AU/d²
Physical Parameters
H (abs. magnitude)19.55
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-27
RMS Residual0.086″
Uncertainty0
Orbit TypeApollo
MOID0.000212 AU
Observations Used4741
Gaia Obs Used94
Oppositions7
Arc Total1986-2016
First Observation Used1999-05-10
Last Observation Used2025-07-23
Observations (7718)
Date Type RA Dec Mag Band Observatory
2021-03-31 10:24:05 S 10 53 59.088 -34 45 00.86 V C57
2021-03-31 10:24:05 s 1 -186016.49 8 +93251.450 7690.0 C57
2021-03-31 10:34:05 S 10 53 59.153 -34 44 38.80 V C57
2021-03-31 10:34:05 s 1 -185842.22 8 +92403.726 9030.0 C57
2021-03-31 10:44:05 S 10 53 59.134 -34 44 15.76 V C57
2021-03-31 10:44:05 s 1 -185665.10 1 +91554.578 4850.0 C57
2021-03-31 10:54:05 S 10 53 59.054 -34 43 52.43 V C57
2021-03-31 10:54:05 s 1 -185485.09 9 +90704.009 5100.0 C57
2021-03-31 11:04:05 S 10 53 59.062 -34 43 30.79 V C57
2021-03-31 11:04:05 s 1 -185302.20 1 +89852.020 9740.0 C57
2021-03-31 11:14:05 S 10 53 59.122 -34 43 08.40 V C57
2021-03-31 11:14:05 s 1 -185116.38 9 +88998.614 8750.0 C57
2021-03-31 11:24:05 S 10 53 59.165 -34 42 46.84 V C57
2021-03-31 11:24:05 s 1 -184927.64 3 +88143.794 2080.0 C57
2021-03-31 11:34:05 S 10 53 59.040 -34 42 23.00 V C57
2021-03-31 11:34:05 s 1 -184735.94 3 +87287.562 9690.0 C57
2021-03-31 11:44:05 S 10 53 58.954 -34 42 02.70 V C57
2021-03-31 11:44:05 s 1 -184541.26 9 +86429.922 1540.0 C57
2021-03-31 11:54:05 S 10 53 59.206 -34 41 37.07 V C57
2021-03-31 11:54:05 s 1 -184343.60 1 +85570.875 7600.0 C57
2021-03-31 12:44:05 S 10 53 59.160 -34 39 43.52 V C57
2021-03-31 12:44:05 s 1 -183309.63 5 +81254.665 9540.0 C57
2021-03-31 12:54:05 S 10 53 59.090 -34 39 20.95 V C57
2021-03-31 12:54:05 s 1 -183093.57 1 +80387.250 9970.0 C57
2021-03-31 13:04:05 S 10 53 58.990 -34 38 57.84 V C57
2021-03-31 13:04:05 s 1 -182874.36 6 +79518.453 4310.0 C57
2021-03-31 13:14:05 S 10 53 59.081 -34 38 37.18 V C57
2021-03-31 13:14:05 s 1 -182651.99 9 +78648.277 2540.0 C57
2021-03-31 13:24:05 S 10 53 59.119 -34 38 12.95 V C57
2021-03-31 13:24:05 s 1 -182426.44 9 +77776.727 4590.0 C57
2021-03-31 13:34:05 S 10 53 59.186 -34 37 49.51 V C57
2021-03-31 13:34:05 s 1 -182197.69 2 +76903.806 430.0 C57
2021-03-31 13:44:05 S 10 53 59.206 -34 37 25.90 V C57
2021-03-31 13:44:05 s 1 -181965.70 8 +76029.518 10.0 C57
2021-03-31 13:54:05 S 10 53 59.076 -34 37 03.83 V C57
2021-03-31 13:54:05 s 1 -181730.47 3 +75153.868 3300.0 C57
2021-03-31 14:04:05 S 10 53 59.042 -34 36 41.72 V C57
2021-03-31 14:04:05 s 1 -181491.96 4 +74276.861 240.0 C57
2021-03-31 14:14:05 S 10 53 59.081 -34 36 18.65 V C57
2021-03-31 14:14:05 s 1 -181250.15 8 +73398.500 790.0 C57
2021-03-31 14:24:05 S 10 53 58.992 -34 35 54.82 V C57
2021-03-31 14:24:05 s 1 -181005.03 3 +72518.792 4900.0 C57
2021-03-31 14:34:05 S 10 53 59.155 -34 35 32.82 V C57
2021-03-31 14:34:05 s 1 -180756.56 5 +71637.740 2540.0 C57
2021-03-31 14:44:05 S 10 53 59.064 -34 35 09.49 V C57
2021-03-31 14:44:05 s 1 -180504.73 0 +70755.349 3640.0 C57
2021-03-31 14:54:05 S 10 53 59.162 -34 34 47.24 V C57
2021-03-31 14:54:05 s 1 -180249.50 4 +69871.626 8170.0 C57
2021-03-31 15:04:05 S 10 53 59.076 -34 34 23.74 V C57
2021-03-31 15:04:05 s 1 -179990.86 3 +68986.575 6080.0 C57
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2020-12-12 03:00:00 70251762.49 2 us 8560 -14 -14
2020-12-18 01:10:00 64846561.92 2 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)