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
2021-01-23 00:34:08 S 05 02 47.328 -78 45 29.92 V C57
2021-01-23 00:34:08 s 1 -163819.74 7 +313705.73 6220.0 C57
2021-01-23 00:44:07 S 05 02 56.981 -78 45 24.77 V C57
2021-01-23 00:44:07 s 1 -164051.62 3 +313317.50 550.0 C57
2021-01-23 00:54:08 S 05 03 06.684 -78 45 23.29 V C57
2021-01-23 00:54:08 s 1 -164282.97 3 +312928.27 3980.0 C57
2021-01-23 01:04:07 S 05 03 16.606 -78 45 23.58 V C57
2021-01-23 01:04:07 s 1 -164513.79 5 +312538.03 6500.0 C57
2021-01-23 01:14:07 S 05 03 25.642 -78 45 18.43 V C57
2021-01-23 01:14:07 s 1 -164744.08 8 +312146.78 8120.0 C57
2021-01-23 01:24:08 S 05 03 35.400 -78 45 19.19 V C57
2021-01-23 01:24:08 s 1 -164973.85 0 +311754.52 8820.0 C57
2021-01-23 01:34:07 S 05 03 43.925 -78 45 14.18 V C57
2021-01-23 01:34:07 s 1 -165203.07 9 +311361.25 8610.0 C57
2021-01-23 01:44:08 S 05 03 52.990 -78 45 10.94 V C57
2021-01-23 01:44:08 s 1 -165431.77 3 +310966.97 7490.0 C57
2021-01-23 01:54:07 S 05 04 03.206 -78 45 11.12 V C57
2021-01-23 01:54:07 s 1 -165659.93 0 +310571.68 5440.0 C57
2021-01-23 02:04:08 S 05 04 12.662 -78 45 07.88 V C57
2021-01-23 02:04:08 s 1 -165887.54 9 +310175.38 2470.0 C57
2021-01-23 02:14:07 S 05 04 22.130 -78 45 04.79 V C57
2021-01-23 02:14:07 s 1 -166114.62 8 +309778.06 8570.0 C57
2021-01-23 02:24:07 S 05 04 31.361 -78 44 59.14 V C57
2021-01-23 02:24:07 s 1 -166341.16 4 +309379.73 3740.0 C57
2021-01-23 02:54:08 S 05 04 59.683 -78 44 51.97 V C57
2021-01-23 02:54:08 s 1 -167017.50 1 +308178.64 3650.0 C57
2021-01-23 03:14:08 S 05 05 20.206 -78 44 47.87 V C57
2021-01-23 03:14:08 s 1 -167465.64 6 +307372.84 5540.0 C57
2021-01-23 03:24:07 S 05 05 30.341 -78 44 46.21 V C57
2021-01-23 03:24:07 s 1 -167688.88 9 +306968.40 5060.0 C57
2021-01-23 03:34:08 S 05 05 38.254 -78 44 41.50 V C57
2021-01-23 03:34:08 s 1 -167911.57 6 +306562.95 3620.0 C57
2021-01-23 03:44:07 S 05 05 47.736 -78 44 36.42 V C57
2021-01-23 03:44:07 s 1 -168133.70 7 +306156.48 1240.0 C57
2021-01-23 03:54:07 S 05 05 57.847 -78 44 34.98 V C57
2021-01-23 03:54:07 s 1 -168355.27 7 +305748.99 7890.0 C57
2021-01-23 04:04:07 S 05 06 05.928 -78 44 35.02 V C57
2021-01-23 04:04:07 s 1 -168576.28 6 +305340.48 3570.0 C57
2021-01-23 04:14:07 S 05 06 15.830 -78 44 27.24 V C57
2021-01-23 04:14:07 s 1 -168796.73 2 +304930.95 8290.0 C57
2021-01-23 04:24:08 S 05 06 26.592 -78 44 26.23 V C57
2021-01-23 04:24:08 s 1 -169016.61 3 +304520.39 2040.0 C57
2021-01-23 04:34:07 S 05 06 33.744 -78 44 20.51 V C57
2021-01-23 04:34:07 s 1 -169235.92 6 +304108.80 4810.0 C57
2021-01-23 04:44:08 S 05 06 44.801 -78 44 17.52 V C57
2021-01-23 04:44:08 s 1 -169454.67 0 +303696.20 6610.0 C57
2021-01-23 04:54:07 S 05 06 54.110 -78 44 15.00 V C57
2021-01-23 04:54:07 s 1 -169672.84 3 +303282.56 7420.0 C57
2021-01-23 05:04:08 S 05 07 03.173 -78 44 15.22 V C57
2021-01-23 05:04:08 s 1 -169890.44 2 +302867.91 7250.0 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)