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
2021-03-29 03:44:06 S 10 53 36.274 -36 38 52.48 V C57
2021-03-29 03:44:06 s 1 -153013.67 6 +296759.84 1850.0 C57
2021-03-29 03:54:05 S 10 53 36.514 -36 38 34.80 V C57
2021-03-29 03:54:05 s 1 -153276.48 0 +296345.54 9560.0 C57
2021-03-29 04:04:06 S 10 53 36.751 -36 38 14.50 V C57
2021-03-29 04:04:06 s 1 -153538.69 2 +295930.11 6150.0 C57
2021-03-29 04:14:05 S 10 53 36.775 -36 37 55.02 V C57
2021-03-29 04:14:05 s 1 -153800.31 0 +295513.53 1640.0 C57
2021-03-29 04:24:06 S 10 53 36.907 -36 37 34.14 V C57
2021-03-29 04:24:06 s 1 -154061.33 1 +295095.80 6000.0 C57
2021-03-29 04:34:05 S 10 53 37.027 -36 37 15.31 V C57
2021-03-29 04:34:05 s 1 -154321.75 3 +294676.93 9240.0 C57
2021-03-29 04:44:06 S 10 53 37.200 -36 36 53.42 V C57
2021-03-29 04:44:06 s 1 -154581.57 4 +294256.92 1360.0 C57
2021-03-29 04:54:05 S 10 53 37.519 -36 36 34.52 V C57
2021-03-29 04:54:05 s 1 -154840.79 2 +293835.76 2340.0 C57
2021-03-29 05:04:06 S 10 53 37.442 -36 36 15.30 V C57
2021-03-29 05:04:06 s 1 -155099.40 3 +293413.45 2180.0 C57
2021-03-29 05:14:06 S 10 53 37.541 -36 35 56.18 V C57
2021-03-29 05:14:06 s 1 -155357.40 7 +292989.99 880.0 C57
2021-03-29 05:24:05 S 10 53 37.776 -36 35 38.40 V C57
2021-03-29 05:24:05 s 1 -155614.80 0 +292565.39 8440.0 C57
2021-03-29 05:34:04 S 10 53 37.829 -36 35 17.48 V C57
2021-03-29 05:34:04 s 1 -155871.58 0 +292139.63 4840.0 C57
2021-03-29 05:44:05 S 10 53 38.242 -36 35 00.56 V C57
2021-03-29 05:44:05 s 1 -156127.74 5 +291712.72 90.0 C57
2021-03-29 06:24:05 S 10 53 38.664 -36 33 35.24 V C57
2021-03-29 06:24:05 s 1 -157146.20 5 +289993.57 9450.0 C57
2021-03-29 06:44:06 S 10 53 38.986 -36 32 56.80 V C57
2021-03-29 06:44:06 s 1 -157651.68 2 +289127.06 7080.0 C57
2021-03-29 06:54:05 S 10 53 38.866 -36 32 37.82 V C57
2021-03-29 06:54:05 s 1 -157903.47 3 +288692.07 4110.0 C57
2021-03-29 07:04:06 S 10 53 39.257 -36 32 16.91 V C57
2021-03-29 07:04:06 s 1 -158154.63 0 +288255.93 9950.0 C57
2021-03-29 07:14:05 S 10 53 39.518 -36 31 57.90 V C57
2021-03-29 07:14:05 s 1 -158405.15 0 +287818.62 4590.0 C57
2021-03-29 07:24:06 S 10 53 39.617 -36 31 37.16 V C57
2021-03-29 07:24:06 s 1 -158655.03 1 +287380.15 8040.0 C57
2021-03-29 07:34:05 S 10 53 39.706 -36 31 18.48 V C57
2021-03-29 07:34:05 s 1 -158904.26 9 +286940.53 270.0 C57
2021-03-29 07:44:06 S 10 53 39.677 -36 30 56.48 V C57
2021-03-29 07:44:06 s 1 -159152.86 3 +286499.74 1300.0 C57
2021-03-29 07:54:05 S 10 53 39.770 -36 30 37.76 V C57
2021-03-29 07:54:05 s 1 -159400.81 0 +286057.79 1100.0 C57
2021-03-29 08:04:06 S 10 53 40.068 -36 30 17.24 V C57
2021-03-29 08:04:06 s 1 -159648.10 8 +285614.67 9690.0 C57
2021-03-29 08:14:06 S 10 53 40.193 -36 29 59.28 V C57
2021-03-29 08:14:06 s 1 -159894.75 4 +285170.39 7050.0 C57
2021-03-29 08:24:05 S 10 53 40.488 -36 29 38.15 V C57
2021-03-29 08:24:05 s 1 -160140.74 5 +284724.95 3180.0 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)