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
2021-03-17 05:34:06 s 1 -191893.16 5 +218371.41 6720.0 C57
2021-03-17 05:44:06 S 10 38 50.095 -46 45 17.96 V C57
2021-03-17 05:44:06 s 1 -192019.60 4 +217776.99 890.0 C57
2021-03-17 05:54:06 S 10 38 49.411 -46 44 56.69 V C57
2021-03-17 05:54:06 s 1 -192144.94 9 +217181.31 2990.0 C57
2021-03-17 06:14:06 S 10 38 49.284 -46 44 09.28 V C57
2021-03-17 06:14:06 s 1 -192392.34 0 +215986.17 980.0 C57
2021-03-17 06:34:06 S 10 38 49.044 -46 43 30.36 V C57
2021-03-17 06:34:06 s 1 -192635.30 2 +214785.99 600.0 C57
2021-03-17 06:44:06 S 10 38 49.337 -46 43 10.85 V C57
2021-03-17 06:44:06 s 1 -192755.10 9 +214184.01 2260.0 C57
2021-03-17 06:54:06 S 10 38 49.442 -46 42 48.46 V C57
2021-03-17 06:54:06 s 1 -192873.79 4 +213580.76 1800.0 C57
2021-03-17 07:04:06 S 10 38 48.989 -46 42 24.84 V C57
2021-03-17 07:04:06 s 1 -192991.35 2 +212976.25 9210.0 C57
2021-03-17 07:14:06 S 10 38 49.030 -46 42 03.96 V C57
2021-03-17 07:14:06 s 1 -193107.77 7 +212370.47 4490.0 C57
2021-03-17 07:24:06 S 10 38 48.989 -46 41 41.42 V C57
2021-03-17 07:24:06 s 1 -193223.06 6 +211763.42 7620.0 C57
2021-03-17 07:34:06 S 10 38 48.869 -46 41 23.21 V C57
2021-03-17 07:34:06 s 1 -193337.21 2 +211155.10 8590.0 C57
2021-03-17 07:44:06 S 10 38 48.622 -46 41 01.25 V C57
2021-03-17 07:44:06 s 1 -193450.21 1 +210545.52 7400.0 C57
2021-03-17 07:54:06 S 10 38 48.835 -46 40 39.97 V C57
2021-03-17 07:54:06 s 1 -193562.05 7 +209934.66 4030.0 C57
2021-03-17 08:54:06 S 10 38 48.012 -46 38 27.49 V C57
2021-03-17 08:54:06 s 1 -194208.64 5 +206242.76 7590.0 C57
2021-03-17 09:04:06 S 10 38 47.774 -46 38 06.14 V C57
2021-03-17 09:04:06 s 1 -194312.27 9 +205622.98 8720.0 C57
2021-03-17 09:14:06 S 10 38 47.753 -46 37 44.47 V C57
2021-03-17 09:14:06 s 1 -194414.71 9 +205001.91 7590.0 C57
2021-03-17 09:24:06 S 10 38 47.364 -46 37 24.13 V C57
2021-03-17 09:24:06 s 1 -194515.95 9 +204379.56 4190.0 C57
2021-03-17 09:34:06 S 10 38 47.462 -46 37 00.12 V C57
2021-03-17 09:34:06 s 1 -194615.99 4 +203755.93 8520.0 C57
2021-03-17 09:44:06 S 10 38 47.386 -46 36 38.92 V C57
2021-03-17 09:44:06 s 1 -194714.81 8 +203131.01 560.0 C57
2021-03-17 09:54:06 S 10 38 47.078 -46 36 20.56 V C57
2021-03-17 09:54:06 s 1 -194812.42 5 +202504.81 300.0 C57
2021-03-17 10:04:06 S 10 38 46.663 -46 35 57.44 V C57
2021-03-17 10:04:06 s 1 -194908.81 1 +201877.33 7740.0 C57
2021-03-17 10:14:06 S 10 38 46.913 -46 35 33.40 V C57
2021-03-17 10:14:06 s 1 -195003.97 0 +201248.56 2860.0 C57
2021-03-17 10:24:06 S 10 38 46.819 -46 35 15.72 V C57
2021-03-17 10:24:06 s 1 -195097.89 6 +200618.49 5640.0 C57
2021-03-17 10:34:06 S 10 38 46.843 -46 34 51.56 V C57
2021-03-17 10:34:06 s 1 -195190.58 4 +199987.14 6090.0 C57
2021-03-17 10:44:06 S 10 38 46.865 -46 34 31.76 V C57
2021-03-17 10:44:06 s 1 -195282.02 7 +199354.50 4180.0 C57
2021-03-17 10:54:06 S 10 38 46.610 -46 34 08.90 V 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)