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
2021-03-28 03:44:06 S 10 53 09.331 -37 25 34.46 V C57
2021-03-28 03:44:06 s 1 -109995.82 3 +344867.78 1450.0 C57
2021-03-28 03:54:06 S 10 53 09.595 -37 25 15.71 V C57
2021-03-28 03:54:06 s 1 -110324.02 0 +344610.65 760.0 C57
2021-03-28 04:04:06 S 10 53 09.840 -37 24 57.53 V C57
2021-03-28 04:04:06 s 1 -110651.87 9 +344352.48 9430.0 C57
2021-03-28 04:14:06 S 10 53 10.078 -37 24 38.23 V C57
2021-03-28 04:14:06 s 1 -110979.39 8 +344093.25 7490.0 C57
2021-03-28 04:24:06 S 10 53 10.322 -37 24 19.66 V C57
2021-03-28 04:24:06 s 1 -111306.57 4 +343832.97 4910.0 C57
2021-03-28 04:34:06 S 10 53 10.507 -37 23 59.96 V C57
2021-03-28 04:34:06 s 1 -111633.40 8 +343571.64 1710.0 C57
2021-03-28 04:44:06 S 10 53 10.714 -37 23 40.67 V C57
2021-03-28 04:44:06 s 1 -111959.89 7 +343309.26 7870.0 C57
2021-03-28 04:54:06 S 10 53 10.906 -37 23 21.91 V C57
2021-03-28 04:54:06 s 1 -112286.04 0 +343045.82 3400.0 C57
2021-03-28 05:04:06 S 10 53 11.186 -37 23 00.56 V C57
2021-03-28 05:04:06 s 1 -112611.83 5 +342781.32 8290.0 C57
2021-03-28 05:14:06 S 10 53 11.386 -37 22 43.64 V C57
2021-03-28 05:14:06 s 1 -112937.28 2 +342515.77 2530.0 C57
2021-03-28 05:24:06 S 10 53 11.482 -37 22 24.13 V C57
2021-03-28 05:24:06 s 1 -113262.37 9 +342249.17 6130.0 C57
2021-03-28 05:34:06 S 10 53 11.854 -37 22 05.16 V C57
2021-03-28 05:34:06 s 1 -113587.12 4 +341981.51 9090.0 C57
2021-03-28 05:44:06 S 10 53 12.154 -37 21 44.86 V C57
2021-03-28 05:44:06 s 1 -113911.51 6 +341712.79 1400.0 C57
2021-03-28 05:54:06 S 10 53 12.077 -37 21 23.47 V C57
2021-03-28 05:54:06 s 1 -114235.55 4 +341443.02 3050.0 C57
2021-03-28 06:04:06 S 10 53 12.420 -37 21 06.44 V C57
2021-03-28 06:04:06 s 1 -114559.23 6 +341172.19 4050.0 C57
2021-03-28 06:14:06 S 10 53 12.718 -37 20 46.03 V C57
2021-03-28 06:14:06 s 1 -114882.56 0 +340900.31 4390.0 C57
2021-03-28 06:24:06 S 10 53 12.758 -37 20 27.13 V C57
2021-03-28 06:24:06 s 1 -115205.52 6 +340627.36 4070.0 C57
2021-03-28 06:34:06 S 10 53 12.970 -37 20 08.12 V C57
2021-03-28 06:34:06 s 1 -115528.13 2 +340353.36 3090.0 C57
2021-03-28 06:44:06 S 10 53 13.318 -37 19 49.01 V C57
2021-03-28 06:44:06 s 1 -115850.37 6 +340078.30 1440.0 C57
2021-03-28 06:54:06 S 10 53 13.493 -37 19 29.28 V C57
2021-03-28 06:54:06 s 1 -116172.25 7 +339802.18 9120.0 C57
2021-03-28 07:04:06 S 10 53 13.778 -37 19 11.21 V C57
2021-03-28 07:04:06 s 1 -116493.77 4 +339525.00 6140.0 C57
2021-03-28 07:14:06 S 10 53 14.074 -37 18 50.98 V C57
2021-03-28 07:14:06 s 1 -116814.92 4 +339246.76 2470.0 C57
2021-03-28 07:24:06 S 10 53 14.143 -37 18 33.19 V C57
2021-03-28 07:24:06 s 1 -117135.70 7 +338967.45 8130.0 C57
2021-03-28 07:34:06 S 10 53 14.429 -37 18 13.25 V C57
2021-03-28 07:34:06 s 1 -117456.12 2 +338687.09 3110.0 C57
2021-03-28 07:44:06 S 10 53 14.614 -37 17 53.45 V C57
2021-03-28 07:44:06 s 1 -117776.16 6 +338405.67 7410.0 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)