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
2021-03-18 13:54:06 s 1 -187855.59 7 +78341.405 1730.0 C57
2021-03-18 14:04:06 S 10 38 21.571 -45 31 19.67 V C57
2021-03-18 14:04:06 s 1 -187624.87 8 +77488.487 7090.0 C57
2021-03-18 14:14:06 S 10 38 21.569 -45 30 54.54 V C57
2021-03-18 14:14:06 s 1 -187391.08 9 +76634.293 6580.0 C57
2021-03-18 14:54:06 S 10 38 20.957 -45 29 14.93 V C57
2021-03-18 14:54:06 s 1 -186424.82 2 +73204.847 5060.0 C57
2021-03-18 15:14:06 S 10 38 20.335 -45 28 25.57 V C57
2021-03-18 15:14:06 s 1 -185922.73 0 +71482.584 8040.0 C57
2021-03-18 15:24:06 S 10 38 20.304 -45 28 00.26 V C57
2021-03-18 15:24:06 s 1 -185666.86 9 +70619.583 5320.0 C57
2021-03-18 16:04:06 S 10 38 19.733 -45 26 18.85 V C57
2021-03-18 16:04:06 s 1 -184610.81 9 +67155.242 2070.0 C57
2021-03-18 16:14:06 S 10 38 19.440 -45 25 54.73 V C57
2021-03-18 16:14:06 s 1 -184338.54 3 +66286.099 7940.0 C57
2021-03-18 16:24:06 S 10 38 19.164 -45 25 29.35 V C57
2021-03-18 16:24:06 s 1 -184062.91 6 +65415.744 7400.0 C57
2021-03-18 16:34:06 S 10 38 18.809 -45 25 04.73 V C57
2021-03-18 16:34:06 s 1 -183783.91 6 +64544.182 410.0 C57
2021-03-18 16:44:06 S 10 38 18.905 -45 24 39.53 V C57
2021-03-18 16:44:06 s 1 -183501.51 8 +63671.421 6910.0 C57
2021-03-18 17:14:06 S 10 38 18.691 -45 23 22.88 V C57
2021-03-18 17:14:06 s 1 -182633.70 7 +61046.000 6940.0 C57
2021-03-18 17:44:06 S 10 38 17.923 -45 22 05.09 V C57
2021-03-18 17:44:06 s 1 -181734.46 4 +58410.014 6780.0 C57
2021-03-21 06:24:06 S 10 42 42.828 -42 32 40.63 V C57
2021-03-21 06:24:06 s 1 +154473.55 5 +44750.573 4770.0 C57
2021-03-21 11:14:06 S 10 43 20.966 -42 22 46.92 V C57
2021-03-21 11:14:06 s 1 +162065.48 7 +73545.208 8920.0 C57
2021-03-21 11:34:06 S 10 43 23.530 -42 22 00.80 V C57
2021-03-21 11:34:06 s 1 +162456.99 0 +75477.945 1850.0 C57
2021-03-21 12:14:06 S 10 43 29.160 -42 20 41.57 V C57
2021-03-21 12:14:06 s 1 +163193.77 7 +79321.762 7350.0 C57
2021-03-21 12:34:06 S 10 43 31.454 -42 20 02.04 V C57
2021-03-21 12:34:06 s 1 +163539.56 9 +81232.755 880.0 C57
2021-03-21 12:44:06 S 10 43 32.719 -42 19 39.72 V C57
2021-03-21 12:44:06 s 1 +163706.92 2 +82185.506 1790.0 C57
2021-03-21 13:00:57 C 10 41 40.41 -42 36 07.8 q E89
2021-03-21 13:14:06 S 10 43 36.550 -42 18 41.62 V C57
2021-03-21 13:14:06 s 1 +164187.17 6 +85032.722 1840.0 C57
2021-03-21 13:24:06 S 10 43 37.769 -42 18 21.85 V C57
2021-03-21 13:24:06 s 1 +164340.09 0 +85978.102 4480.0 C57
2021-03-21 13:54:06 S 10 43 41.486 -42 17 22.13 V C57
2021-03-21 13:54:06 s 1 +164777.72 6 +88803.115 1040.0 C57
2021-03-21 14:15:57 C 10 41 42.92 -42 33 24.1 q E89
2021-03-21 14:25:35 C 10 41 43.31 -42 33 02.7 q E89
2021-03-21 15:34:06 S 10 43 53.748 -42 14 03.95 V C57
2021-03-21 15:34:06 s 1 +166016.26 8 +98098.389 7640.0 C57
2021-03-21 16:34:06 S 10 44 01.438 -42 12 05.83 V C57
2021-03-21 16:34:06 s 1 +166604.74 5 +103585.21 7950.0 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)