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
2025-07-01 23:19:43 C 16 35 24.900 -15 35 02.40 V R17
2025-07-01 23:39:24 C 16 35 23.820 -15 34 55.02 V R17
2025-07-01 23:59:07 C 16 35 22.764 -15 34 47.82 V R17
2025-07-02 23:04:04 C 16 34 17.597 -15 26 20.47 V M22
2025-07-02 23:09:56 C 16 34 17.333 -15 26 18.38 V M22
2025-07-02 23:19:59 C 16 34 16.860 -15 26 14.03 V M22
2025-07-03 00:03:19 C 16 34 14.702 -15 26 00.46 V M22
2025-07-03 08:00:45 C 16 33 54.444 -15 23 35.24 X F52
2025-07-03 08:16:27 C 16 33 53.661 -15 23 29.92 X F52
2025-07-03 08:32:09 C 16 33 52.884 -15 23 24.57 X F52
2025-07-03 08:47:49 C 16 33 52.107 -15 23 19.26 X F52
2025-07-15 06:58:52 C 16 26 17.158 -14 13 27.25 X F52
2025-07-15 07:14:34 C 16 26 16.929 -14 13 24.78 X F52
2025-07-15 07:30:14 C 16 26 16.698 -14 13 22.37 X F52
2025-07-15 07:45:52 C 16 26 16.468 -14 13 19.94 X F52
2025-07-23 07:37:07 C 16 26 18.686 -13 53 24.56 X F51
2025-07-23 07:54:15 C 16 26 18.777 -13 53 23.49 X F51
2025-07-23 08:11:25 C 16 26 18.882 -13 53 22.32 X F51
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)