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
2021-03-27 10:14:06 S 10 52 42.552 -37 58 53.15 V C57
2021-03-27 10:14:06 s 1 -73906.019 0 +366082.83 7780.0 C57
2021-03-27 10:24:06 S 10 52 42.785 -37 58 34.97 V C57
2021-03-27 10:24:06 s 1 -74262.727 0 +365934.30 8760.0 C57
2021-03-27 10:34:06 S 10 52 43.034 -37 58 14.70 V C57
2021-03-27 10:34:06 s 1 -74619.225 0 +365784.74 9370.0 C57
2021-03-27 10:44:06 S 10 52 43.354 -37 57 57.42 V C57
2021-03-27 10:44:06 s 1 -74975.511 0 +365634.17 9600.0 C57
2021-03-27 10:54:06 S 10 52 43.757 -37 57 37.66 V C57
2021-03-27 10:54:06 s 1 -75331.585 0 +365482.57 9450.0 C57
2021-03-27 11:04:06 S 10 52 43.874 -37 57 18.29 V C57
2021-03-27 11:04:06 s 1 -75687.446 0 +365329.95 8920.0 C57
2021-03-27 11:14:06 S 10 52 44.170 -37 56 59.24 V C57
2021-03-27 11:14:06 s 1 -76043.093 0 +365176.31 8020.0 C57
2021-03-27 11:24:06 S 10 52 44.616 -37 56 41.64 V C57
2021-03-27 11:24:06 s 1 -76398.523 0 +365021.64 6720.0 C57
2021-03-27 11:34:06 S 10 52 44.856 -37 56 22.34 V C57
2021-03-27 11:34:06 s 1 -76753.738 0 +364865.95 5040.0 C57
2021-03-27 11:44:06 S 10 52 45.062 -37 56 02.69 V C57
2021-03-27 11:44:06 s 1 -77108.734 0 +364709.24 2980.0 C57
2021-03-27 11:54:06 S 10 52 45.240 -37 55 45.70 V C57
2021-03-27 11:54:06 s 1 -77463.511 0 +364551.51 520.0 C57
2021-03-27 12:04:06 S 10 52 45.770 -37 55 26.94 V C57
2021-03-27 12:04:06 s 1 -77818.068 0 +364392.75 7670.0 C57
2021-03-27 12:14:06 S 10 52 45.782 -37 55 07.64 V C57
2021-03-27 12:14:06 s 1 -78172.404 0 +364232.97 4430.0 C57
2021-03-27 12:24:06 S 10 52 46.207 -37 54 47.59 V C57
2021-03-27 12:24:06 s 1 -78526.518 0 +364072.17 790.0 C57
2021-03-27 12:34:06 S 10 52 46.483 -37 54 29.63 V C57
2021-03-27 12:34:06 s 1 -78880.408 0 +363910.35 6740.0 C57
2021-03-27 12:44:06 S 10 52 46.745 -37 54 09.97 V C57
2021-03-27 12:44:06 s 1 -79234.074 0 +363747.50 2300.0 C57
2021-03-27 12:54:06 S 10 52 46.922 -37 53 51.50 V C57
2021-03-27 12:54:06 s 1 -79587.514 0 +363583.62 7460.0 C57
2021-03-27 13:04:06 S 10 52 47.354 -37 53 32.96 V C57
2021-03-27 13:04:06 s 1 -79940.727 0 +363418.72 2200.0 C57
2021-03-27 13:14:06 S 10 52 47.534 -37 53 13.85 V C57
2021-03-27 13:14:06 s 1 -80293.712 0 +363252.80 6540.0 C57
2021-03-27 13:24:06 S 10 52 47.726 -37 52 55.34 V C57
2021-03-27 13:24:06 s 1 -80646.468 0 +363085.86 480.0 C57
2021-03-27 13:34:06 S 10 52 48.228 -37 52 35.62 V C57
2021-03-27 13:34:06 s 1 -80998.993 0 +362917.88 3990.0 C57
2021-03-27 13:44:06 S 10 52 48.386 -37 52 17.15 V C57
2021-03-27 13:44:06 s 1 -81351.288 0 +362748.89 7100.0 C57
2021-03-27 13:54:06 S 10 52 48.694 -37 51 56.70 V C57
2021-03-27 13:54:06 s 1 -81703.349 0 +362578.87 9780.0 C57
2021-03-27 14:04:06 S 10 52 48.773 -37 51 39.49 V C57
2021-03-27 14:04:06 s 1 -82055.177 0 +362407.82 2050.0 C57
2021-03-27 14:14:06 S 10 52 49.152 -37 51 19.33 V C57
2021-03-27 14:14:06 s 1 -82406.770 0 +362235.75 3890.0 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)