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
2021-03-22 06:04:06 S 10 45 31.066 -41 46 16.21 V C57
2021-03-22 06:04:06 s 1 +165557.04 6 +171043.62 1050.0 C57
2021-03-22 06:14:06 S 10 45 32.222 -41 45 57.85 V C57
2021-03-22 06:14:06 s 1 +165459.18 9 +171801.31 8230.0 C57
2021-03-22 06:24:06 S 10 45 33.084 -41 45 38.95 V C57
2021-03-22 06:24:06 s 1 +165359.62 7 +172557.22 2010.0 C57
2021-03-22 06:34:06 S 10 45 34.284 -41 45 20.30 V C57
2021-03-22 06:34:06 s 1 +165258.37 2 +173311.37 2410.0 C57
2021-03-22 06:44:06 S 10 45 35.150 -41 45 02.95 V C57
2021-03-22 06:44:06 s 1 +165155.43 6 +174063.74 9440.0 C57
2021-03-22 06:54:06 S 10 45 36.223 -41 44 43.62 V C57
2021-03-22 06:54:06 s 1 +165050.82 8 +174814.36 3130.0 C57
2021-03-22 07:04:06 S 10 45 37.272 -41 44 23.53 V C57
2021-03-22 07:04:06 s 1 +164944.55 9 +175563.21 3500.0 C57
2021-03-22 07:14:06 S 10 45 38.162 -41 44 05.17 V C57
2021-03-22 07:14:06 s 1 +164836.64 0 +176310.31 570.0 C57
2021-03-22 07:24:06 S 10 45 39.410 -41 43 48.54 V C57
2021-03-22 07:24:06 s 1 +164727.08 2 +177055.64 4360.0 C57
2021-03-22 07:34:06 S 10 45 40.382 -41 43 28.52 V C57
2021-03-22 07:34:06 s 1 +164615.89 4 +177799.23 4900.0 C57
2021-03-22 07:44:06 S 10 45 41.234 -41 43 10.27 V C57
2021-03-22 07:44:06 s 1 +164503.08 8 +178541.06 2190.0 C57
2021-03-22 07:54:06 S 10 45 42.358 -41 42 51.19 V C57
2021-03-22 07:54:06 s 1 +164388.67 3 +179281.14 6260.0 C57
2021-03-22 08:04:06 S 10 45 43.109 -41 42 33.84 V C57
2021-03-22 08:04:06 s 1 +164272.65 9 +180019.48 7130.0 C57
2021-03-22 08:24:06 S 10 45 45.149 -41 41 55.90 V C57
2021-03-22 08:24:06 s 1 +164035.87 5 +181490.93 9340.0 C57
2021-03-22 09:24:06 S 10 45 51.046 -41 40 01.52 V C57
2021-03-22 09:24:06 s 1 +163288.18 5 +185863.64 1160.0 C57
2021-03-22 09:54:48 C 10 42 42.78 -41 53 13.0 V T08
2021-03-22 09:59:26 C 10 42 42.90 -41 53 03.3 V T08
2021-03-22 10:07:24 C 10 42 43.13 -41 52 46.2 V T08
2021-03-22 10:22:39 C 10 42 43.57 -41 52 13.5 V T08
2021-03-22 10:44:06 S 10 45 58.985 -41 37 35.87 V C57
2021-03-22 10:44:06 s 1 +162206.97 5 +191597.54 1150.0 C57
2021-03-22 11:14:06 S 10 46 01.838 -41 36 40.28 V C57
2021-03-22 11:14:06 s 1 +161777.53 9 +193719.60 480.0 C57
2021-03-22 11:34:06 S 10 46 03.876 -41 36 03.71 V C57
2021-03-22 11:34:06 s 1 +161484.17 2 +195125.83 9140.0 C57
2021-03-22 12:04:06 S 10 46 06.804 -41 35 07.40 V C57
2021-03-22 12:04:06 s 1 +161033.67 7 +197222.52 6110.0 C57
2021-03-22 12:54:06 S 10 46 11.424 -41 33 35.89 V C57
2021-03-22 12:54:06 s 1 +160255.58 4 +200683.24 3340.0 C57
2021-03-22 14:44:06 S 10 46 21.730 -41 30 13.50 V C57
2021-03-22 14:44:06 s 1 +158429.37 5 +208143.79 7140.0 C57
2021-03-22 15:04:06 S 10 46 23.618 -41 29 35.52 V C57
2021-03-22 15:04:06 s 1 +158080.61 3 +209480.14 4130.0 C57
2021-03-22 15:54:06 S 10 46 28.332 -41 28 04.73 V C57
2021-03-22 15:54:06 s 1 +157187.27 9 +212792.47 8320.0 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)