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
2021-01-28 13:54:07 S 07 25 54.262 -76 51 18.94 V C57
2021-01-28 13:54:07 s 1 +153055.85 4 +115546.42 5400.0 C57
2021-01-28 14:04:07 S 07 26 02.993 -76 51 17.75 V C57
2021-01-28 14:04:07 s 1 +153116.25 2 +116479.15 1000.0 C57
2021-01-28 14:14:07 S 07 26 10.853 -76 51 24.70 V C57
2021-01-28 14:14:07 s 1 +153173.65 7 +117409.60 1130.0 C57
2021-01-28 14:24:07 S 07 26 19.862 -76 51 26.64 V C57
2021-01-28 14:24:07 s 1 +153228.09 8 +118337.77 5840.0 C57
2021-01-28 14:34:07 S 07 26 28.464 -76 51 28.01 V C57
2021-01-28 14:34:07 s 1 +153279.59 9 +119263.66 5170.0 C57
2021-01-28 14:44:07 S 07 26 36.874 -76 51 30.71 V C57
2021-01-28 14:44:07 s 1 +153328.18 7 +120187.29 9170.0 C57
2021-01-28 14:54:07 S 07 26 44.534 -76 51 32.76 V C57
2021-01-28 14:54:07 s 1 +153373.88 9 +121108.64 7880.0 C57
2021-01-28 15:14:07 S 07 27 02.167 -76 51 38.20 V C57
2021-01-28 15:14:07 s 1 +153456.73 1 +122944.55 9640.0 C57
2021-01-28 15:24:07 S 07 27 10.745 -76 51 42.91 V C57
2021-01-28 15:24:07 s 1 +153493.92 1 +123859.11 2780.0 C57
2021-01-28 15:34:07 S 07 27 19.284 -76 51 46.01 V C57
2021-01-28 15:34:07 s 1 +153528.32 5 +124771.42 820.0 C57
2021-01-28 15:44:07 S 07 27 27.317 -76 51 47.84 V C57
2021-01-28 15:44:07 s 1 +153559.96 5 +125681.48 3790.0 C57
2021-01-28 15:54:07 S 07 27 35.345 -76 51 54.11 V C57
2021-01-28 15:54:07 s 1 +153588.86 6 +126589.29 1760.0 C57
2021-01-28 16:04:07 S 07 27 43.682 -76 51 55.15 V C57
2021-01-28 16:04:07 s 1 +153615.05 1 +127494.86 4750.0 C57
2021-01-28 16:14:07 S 07 27 51.998 -76 51 56.99 V C57
2021-01-28 16:14:07 s 1 +153638.54 4 +128398.18 2810.0 C57
2021-01-28 16:24:07 S 07 28 01.258 -76 52 01.27 V C57
2021-01-28 16:24:07 s 1 +153659.36 8 +129299.27 5980.0 C57
2021-01-28 16:34:07 S 07 28 09.514 -76 52 02.39 V C57
2021-01-28 16:34:07 s 1 +153677.54 5 +130198.13 4310.0 C57
2021-01-28 16:44:07 S 07 28 16.896 -76 52 04.19 V C57
2021-01-28 16:44:07 s 1 +153693.09 9 +131094.76 7830.0 C57
2021-01-28 16:54:07 S 07 28 25.361 -76 52 08.22 V C57
2021-01-28 16:54:07 s 1 +153706.05 1 +131989.16 6580.0 C57
2021-01-28 17:04:07 S 07 28 32.738 -76 52 10.60 V C57
2021-01-28 17:04:07 s 1 +153716.42 5 +132881.34 610.0 C57
2021-01-28 17:14:07 S 07 28 41.184 -76 52 11.14 V C57
2021-01-28 17:14:07 s 1 +153724.24 0 +133771.31 9960.0 C57
2021-01-28 17:24:07 S 07 28 50.126 -76 52 16.18 V C57
2021-01-28 17:24:07 s 1 +153729.52 0 +134659.06 4660.0 C57
2021-01-28 17:34:07 S 07 28 57.886 -76 52 18.23 V C57
2021-01-28 17:34:07 s 1 +153732.28 4 +135544.60 4750.0 C57
2021-01-28 17:44:07 S 07 29 06.048 -76 52 20.03 V C57
2021-01-28 17:44:07 s 1 +153732.55 6 +136427.94 270.0 C57
2021-01-28 17:54:07 S 07 29 14.371 -76 52 22.01 V C57
2021-01-28 17:54:07 s 1 +153730.35 4 +137309.08 1260.0 C57
2021-01-28 18:04:07 S 07 29 22.008 -76 52 25.57 V C57
2021-01-28 18:04:07 s 1 +153725.70 1 +138188.03 7750.0 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)