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
2021-03-22 16:54:06 S 10 46 33.742 -41 26 13.85 V C57
2021-03-22 16:54:06 s 1 +156075.87 7 +216713.74 7640.0 C57
2021-03-22 17:04:06 S 10 46 34.574 -41 25 53.72 V C57
2021-03-22 17:04:06 s 1 +155886.56 0 +217361.65 920.0 C57
2021-03-22 17:14:06 S 10 46 35.465 -41 25 37.92 V C57
2021-03-22 17:14:06 s 1 +155696.09 4 +218007.95 1880.0 C57
2021-03-22 17:24:06 S 10 46 36.610 -41 25 18.88 V C57
2021-03-22 17:24:06 s 1 +155504.48 6 +218652.65 530.0 C57
2021-03-22 17:34:06 S 10 46 37.207 -41 25 00.12 V C57
2021-03-22 17:34:06 s 1 +155311.74 2 +219295.75 6870.0 C57
2021-03-22 17:44:06 S 10 46 38.275 -41 24 41.08 V C57
2021-03-22 17:44:06 s 1 +155117.86 9 +219937.25 930.0 C57
2021-03-22 17:54:06 S 10 46 39.127 -41 24 23.58 V C57
2021-03-22 17:54:06 s 1 +154922.87 3 +220577.16 2710.0 C57
2021-03-22 18:14:06 S 10 46 40.927 -41 23 46.97 V C57
2021-03-22 18:14:06 s 1 +154529.53 9 +221852.19 9490.0 C57
2021-03-22 18:44:06 S 10 46 43.531 -41 22 53.04 V C57
2021-03-22 18:44:06 s 1 +153931.27 5 +223752.85 7890.0 C57
2021-03-22 18:54:06 S 10 46 44.455 -41 22 32.63 V C57
2021-03-22 18:54:06 s 1 +153729.67 5 +224383.24 6270.0 C57
2021-03-22 19:04:06 S 10 46 45.365 -41 22 14.88 V C57
2021-03-22 19:04:06 s 1 +153526.99 6 +225012.05 2460.0 C57
2021-03-22 19:24:06 S 10 46 47.191 -41 21 40.07 V C57
2021-03-22 19:24:06 s 1 +153118.42 6 +226264.95 8320.0 C57
2021-03-22 19:54:06 S 10 46 49.709 -41 20 44.16 V C57
2021-03-22 19:54:06 s 1 +152497.62 9 +228132.52 960.0 C57
2021-03-22 20:04:06 S 10 46 50.652 -41 20 25.66 V C57
2021-03-22 20:04:06 s 1 +152288.60 3 +228751.91 4250.0 C57
2021-03-22 20:14:06 S 10 46 51.523 -41 20 09.28 V C57
2021-03-22 20:14:06 s 1 +152078.54 0 +229369.74 5440.0 C57
2021-03-22 20:44:06 S 10 46 54.024 -41 19 12.11 V C57
2021-03-22 20:44:06 s 1 +151442.18 3 +231213.89 6440.0 C57
2021-03-22 20:54:06 S 10 46 55.092 -41 18 55.37 V C57
2021-03-22 20:54:06 s 1 +151228.02 8 +231825.50 9300.0 C57
2021-03-22 21:14:06 S 10 46 56.962 -41 18 16.99 V C57
2021-03-22 21:14:06 s 1 +150796.69 8 +233044.08 8870.0 C57
2021-03-22 22:54:06 S 10 47 05.441 -41 15 15.98 V C57
2021-03-22 22:54:06 s 1 +148581.06 7 +239044.64 6520.0 C57
2021-03-22 23:24:06 S 10 47 07.944 -41 14 21.59 V C57
2021-03-22 23:24:06 s 1 +147897.73 2 +240815.03 1780.0 C57
2021-03-22 23:54:06 S 10 47 10.577 -41 13 27.12 V C57
2021-03-22 23:54:06 s 1 +147206.04 1 +242571.78 9980.0 C57
2021-03-23 00:14:06 S 10 47 12.134 -41 12 51.59 V C57
2021-03-23 00:14:06 s 1 +146740.33 9 +243735.41 9420.0 C57
2021-03-23 00:24:06 S 10 47 13.068 -41 12 32.87 V C57
2021-03-23 00:24:06 s 1 +146506.13 0 +244314.96 1370.0 C57
2021-03-23 00:34:06 S 10 47 13.999 -41 12 13.90 V C57
2021-03-23 00:34:06 s 1 +146271.02 3 +244893.01 1480.0 C57
2021-03-23 00:44:06 S 10 47 14.688 -41 11 56.26 V C57
2021-03-23 00:44:06 s 1 +146035.02 2 +245469.57 9770.0 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)