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 13:44:06 S 10 38 40.668 -48 50 28.28 V C57
2021-03-14 13:44:06 s 1 -92337.540 0 +362293.67 850.0 C57
2021-03-14 13:54:06 S 10 38 40.850 -48 50 09.60 V C57
2021-03-14 13:54:06 s 1 -92679.530 0 +362119.20 3510.0 C57
2021-03-14 14:04:06 S 10 38 41.345 -48 49 50.23 V C57
2021-03-14 14:04:06 s 1 -93021.276 0 +361943.74 5760.0 C57
2021-03-14 14:14:06 S 10 38 41.189 -48 49 35.58 V C57
2021-03-14 14:14:06 s 1 -93362.777 0 +361767.27 7580.0 C57
2021-03-14 14:24:06 S 10 38 41.578 -48 49 18.88 V C57
2021-03-14 14:24:06 s 1 -93704.033 0 +361589.79 8990.0 C57
2021-03-14 14:34:06 S 10 38 41.599 -48 48 57.85 V C57
2021-03-14 14:34:06 s 1 -94045.042 0 +361411.32 9970.0 C57
2021-03-14 14:44:06 S 10 38 41.767 -48 48 39.28 V C57
2021-03-14 14:44:06 s 1 -94385.804 0 +361231.84 520.0 C57
2021-03-14 14:54:06 S 10 38 41.693 -48 48 22.39 V C57
2021-03-14 14:54:06 s 1 -94726.316 0 +361051.36 640.0 C57
2021-03-14 15:04:06 S 10 38 41.969 -48 47 59.71 V C57
2021-03-14 15:04:06 s 1 -95066.579 0 +360869.88 340.0 C57
2021-03-14 15:14:06 S 10 38 42.122 -48 47 42.65 V C57
2021-03-14 15:14:06 s 1 -95406.590 0 +360687.40 9600.0 C57
2021-03-14 15:24:06 S 10 38 42.338 -48 47 28.61 V C57
2021-03-14 15:24:06 s 1 -95746.349 0 +360503.91 8420.0 C57
2021-03-14 15:34:06 S 10 38 42.650 -48 47 06.65 V C57
2021-03-14 15:34:06 s 1 -96085.855 0 +360319.42 6810.0 C57
2021-03-14 15:44:06 S 10 38 42.720 -48 46 49.58 V C57
2021-03-14 15:44:06 s 1 -96425.107 0 +360133.93 4760.0 C57
2021-03-14 15:54:06 S 10 38 42.816 -48 46 33.92 V C57
2021-03-14 15:54:06 s 1 -96764.102 0 +359947.43 2260.0 C57
2021-03-14 16:04:06 S 10 38 43.051 -48 46 13.15 V C57
2021-03-14 16:04:06 s 1 -97102.841 0 +359759.93 9330.0 C57
2021-03-14 16:14:06 S 10 38 43.034 -48 45 54.65 V C57
2021-03-14 16:14:06 s 1 -97441.322 0 +359571.42 5940.0 C57
2021-03-14 16:24:06 S 10 38 43.222 -48 45 38.38 V C57
2021-03-14 16:24:06 s 1 -97779.544 0 +359381.91 2110.0 C57
2021-03-14 16:34:06 S 10 38 43.529 -48 45 19.30 V C57
2021-03-14 16:34:06 s 1 -98117.506 0 +359191.39 7820.0 C57
2021-03-14 16:44:06 S 10 38 43.495 -48 44 58.74 V C57
2021-03-14 16:44:06 s 1 -98455.207 0 +358999.88 3090.0 C57
2021-03-14 16:54:06 S 10 38 43.553 -48 44 42.32 V C57
2021-03-14 16:54:06 s 1 -98792.645 0 +358807.35 7890.0 C57
2021-03-14 17:14:06 S 10 38 44.114 -48 44 06.29 V C57
2021-03-14 17:14:06 s 1 -99466.729 0 +358419.29 6130.0 C57
2021-03-14 17:24:06 S 10 38 44.402 -48 43 49.62 V C57
2021-03-14 17:24:06 s 1 -99803.373 0 +358223.75 9560.0 C57
2021-03-14 17:34:06 S 10 38 44.136 -48 43 31.91 V C57
2021-03-14 17:34:06 s 1 -100139.75 0 +358027.20 2520.0 C57
2021-03-14 17:44:06 S 10 38 44.472 -48 43 11.64 V C57
2021-03-14 17:44:06 s 1 -100475.85 8 +357829.65 5010.0 C57
2021-03-14 17:54:06 S 10 38 44.678 -48 42 54.40 V C57
2021-03-14 17:54:06 s 1 -100811.69 8 +357631.09 7040.0 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)