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
2021-03-14 18:04:06 S 10 38 44.659 -48 42 33.55 V C57
2021-03-14 18:04:06 s 1 -101147.26 7 +357431.52 8590.0 C57
2021-03-14 18:14:06 S 10 38 44.830 -48 42 17.39 V C57
2021-03-14 18:14:06 s 1 -101482.56 4 +357230.95 9670.0 C57
2021-03-14 18:24:06 S 10 38 45.139 -48 41 59.46 V C57
2021-03-14 18:24:06 s 1 -101817.58 8 +357029.37 270.0 C57
2021-03-14 18:34:06 S 10 38 45.372 -48 41 42.25 V C57
2021-03-14 18:34:06 s 1 -102152.33 8 +356826.78 400.0 C57
2021-03-14 18:44:06 S 10 38 45.336 -48 41 21.95 V C57
2021-03-14 18:44:06 s 1 -102486.81 4 +356623.19 40.0 C57
2021-03-14 18:54:06 S 10 38 45.502 -48 41 02.83 V C57
2021-03-14 18:54:06 s 1 -102821.01 2 +356418.59 9200.0 C57
2021-03-14 19:04:06 S 10 38 45.686 -48 40 43.68 V C57
2021-03-14 19:04:06 s 1 -103154.93 4 +356212.98 7880.0 C57
2021-03-14 19:14:06 S 10 38 45.494 -48 40 27.23 V C57
2021-03-14 19:14:06 s 1 -103488.57 7 +356006.36 6070.0 C57
2021-03-14 19:24:06 S 10 38 45.931 -48 40 08.18 V C57
2021-03-14 19:24:06 s 1 -103821.93 9 +355798.73 3770.0 C57
2021-03-14 19:34:06 S 10 38 45.953 -48 39 48.74 V C57
2021-03-14 19:34:06 s 1 -104155.02 1 +355590.10 970.0 C57
2021-03-14 19:44:06 S 10 38 46.114 -48 39 33.19 V C57
2021-03-14 19:44:06 s 1 -104487.82 1 +355380.46 7680.0 C57
2021-03-14 19:54:06 S 10 38 46.627 -48 39 11.99 V C57
2021-03-14 19:54:06 s 1 -104820.33 7 +355169.80 3890.0 C57
2021-03-14 20:04:06 S 10 38 46.195 -48 38 53.20 V C57
2021-03-14 20:04:06 s 1 -105152.56 9 +354958.14 9610.0 C57
2021-03-14 20:14:06 S 10 38 46.682 -48 38 36.74 V C57
2021-03-14 20:14:06 s 1 -105484.51 4 +354745.47 4820.0 C57
2021-03-14 20:24:06 S 10 38 46.606 -48 38 19.25 V C57
2021-03-14 20:24:06 s 1 -105816.17 3 +354531.78 9530.0 C57
2021-03-14 20:34:06 S 10 38 46.778 -48 38 00.35 V C57
2021-03-14 20:34:06 s 1 -106147.54 4 +354317.09 3730.0 C57
2021-03-14 20:44:06 S 10 38 46.913 -48 37 40.22 V C57
2021-03-14 20:44:06 s 1 -106478.62 5 +354101.39 7420.0 C57
2021-03-14 20:54:06 S 10 38 46.954 -48 37 23.77 V C57
2021-03-14 20:54:06 s 1 -106809.41 6 +353884.67 600.0 C57
2021-03-14 21:04:06 S 10 38 46.670 -48 37 06.10 V C57
2021-03-14 21:04:06 s 1 -107139.91 5 +353666.95 3260.0 C57
2021-03-14 21:14:06 S 10 38 47.383 -48 36 46.94 V C57
2021-03-14 21:14:06 s 1 -107470.12 1 +353448.21 5410.0 C57
2021-03-14 21:44:06 S 10 38 47.645 -48 35 50.57 V C57
2021-03-14 21:44:06 s 1 -108458.96 9 +352785.93 8740.0 C57
2021-03-14 21:54:06 S 10 38 47.398 -48 35 31.13 V C57
2021-03-14 21:54:06 s 1 -108787.99 1 +352563.14 8800.0 C57
2021-03-14 22:04:06 S 10 38 47.738 -48 35 15.58 V C57
2021-03-14 22:04:06 s 1 -109116.71 3 +352339.35 8330.0 C57
2021-03-14 22:14:06 S 10 38 48.101 -48 34 55.13 V C57
2021-03-14 22:14:06 s 1 -109445.13 6 +352114.53 7340.0 C57
2021-03-14 22:24:06 S 10 38 48.358 -48 34 37.31 V C57
2021-03-14 22:24:06 s 1 -109773.25 7 +351888.71 5810.0 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)