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
2021-03-15 16:54:06 S 10 38 56.914 -47 59 48.23 V C57
2021-03-15 16:54:06 s 1 -144011.26 0 +320438.66 3680.0 C57
2021-03-15 17:04:06 S 10 38 56.849 -47 59 27.20 V C57
2021-03-15 17:04:06 s 1 -144296.99 3 +320096.89 5470.0 C57
2021-03-15 17:14:06 S 10 38 56.892 -47 59 07.22 V C57
2021-03-15 17:14:06 s 1 -144582.26 2 +319754.06 6420.0 C57
2021-03-15 17:24:06 S 10 38 56.942 -47 58 49.66 V C57
2021-03-15 17:24:06 s 1 -144867.06 5 +319410.16 6500.0 C57
2021-03-15 17:34:06 S 10 38 57.535 -47 58 29.78 V C57
2021-03-15 17:34:06 s 1 -145151.40 0 +319065.20 5730.0 C57
2021-03-15 17:44:06 S 10 38 57.178 -47 58 09.55 V C57
2021-03-15 17:44:06 s 1 -145435.26 4 +318719.18 4100.0 C57
2021-03-15 17:54:06 S 10 38 57.365 -47 57 50.08 V C57
2021-03-15 17:54:06 s 1 -145718.65 8 +318372.09 1600.0 C57
2021-03-15 18:04:06 S 10 38 57.367 -47 57 31.28 V C57
2021-03-15 18:04:06 s 1 -146001.57 8 +318023.94 8230.0 C57
2021-03-15 18:14:06 S 10 38 57.185 -47 57 10.69 V C57
2021-03-15 18:14:06 s 1 -146284.02 3 +317674.72 3980.0 C57
2021-03-15 18:24:06 S 10 38 57.300 -47 56 53.84 V C57
2021-03-15 18:24:06 s 1 -146565.99 2 +317324.44 8860.0 C57
2021-03-15 18:34:06 S 10 38 57.427 -47 56 34.04 V C57
2021-03-15 18:34:06 s 1 -146847.48 1 +316973.09 2870.0 C57
2021-03-15 18:44:06 S 10 38 57.401 -47 56 15.40 V C57
2021-03-15 18:44:06 s 1 -147128.49 1 +316620.67 5980.0 C57
2021-03-15 18:54:06 S 10 38 57.415 -47 55 56.32 V C57
2021-03-15 18:54:06 s 1 -147409.01 9 +316267.18 8220.0 C57
2021-03-15 19:04:06 S 10 38 57.737 -47 55 36.08 V C57
2021-03-15 19:04:06 s 1 -147689.06 2 +315912.62 9560.0 C57
2021-03-15 19:14:06 S 10 38 57.554 -47 55 18.08 V C57
2021-03-15 19:14:06 s 1 -147968.62 1 +315557.00 10.0 C57
2021-03-15 19:24:06 S 10 38 57.722 -47 54 58.14 V C57
2021-03-15 19:24:06 s 1 -148247.69 1 +315200.30 9560.0 C57
2021-03-15 19:34:06 S 10 38 57.898 -47 54 37.01 V C57
2021-03-15 19:34:06 s 1 -148526.27 3 +314842.53 8210.0 C57
2021-03-15 19:44:06 S 10 38 57.782 -47 54 19.66 V C57
2021-03-15 19:44:06 s 1 -148804.36 3 +314483.69 5960.0 C57
2021-03-15 19:54:06 S 10 38 57.874 -47 54 00.97 V C57
2021-03-15 19:54:06 s 1 -149081.96 1 +314123.78 2800.0 C57
2021-03-15 20:04:06 S 10 38 57.727 -47 53 40.52 V C57
2021-03-15 20:04:06 s 1 -149359.06 4 +313762.80 8730.0 C57
2021-03-15 20:14:06 S 10 38 57.802 -47 53 20.15 V C57
2021-03-15 20:14:06 s 1 -149635.67 1 +313400.74 3750.0 C57
2021-03-15 20:24:06 S 10 38 57.761 -47 53 01.43 V C57
2021-03-15 20:24:06 s 1 -149911.77 9 +313037.61 7850.0 C57
2021-03-15 20:34:06 S 10 38 57.948 -47 52 40.44 V C57
2021-03-15 20:34:06 s 1 -150187.38 7 +312673.40 1020.0 C57
2021-03-15 20:44:06 S 10 38 57.938 -47 52 24.13 V C57
2021-03-15 20:44:06 s 1 -150462.49 4 +312308.12 3270.0 C57
2021-03-15 20:54:06 S 10 38 58.198 -47 52 02.42 V C57
2021-03-15 20:54:06 s 1 -150737.09 6 +311941.76 4600.0 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)