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
2021-03-16 05:44:06 S 10 38 58.114 -47 34 39.43 V C57
2021-03-16 05:44:06 s 1 -164518.72 8 +290967.50 6490.0 C57
2021-03-16 05:54:06 S 10 38 58.200 -47 34 21.43 V C57
2021-03-16 05:54:06 s 1 -164763.16 4 +290542.02 1940.0 C57
2021-03-16 06:04:06 S 10 38 58.186 -47 34 02.28 V C57
2021-03-16 06:04:06 s 1 -165006.98 2 +290115.42 6240.0 C57
2021-03-16 06:14:06 S 10 38 58.013 -47 33 40.32 V C57
2021-03-16 06:14:06 s 1 -165250.18 1 +289687.71 9390.0 C57
2021-03-16 06:24:06 S 10 38 58.042 -47 33 23.11 V C57
2021-03-16 06:24:06 s 1 -165492.75 7 +289258.88 1380.0 C57
2021-03-16 06:34:06 S 10 38 58.176 -47 33 01.80 V C57
2021-03-16 06:34:06 s 1 -165734.70 8 +288828.94 2210.0 C57
2021-03-16 06:44:06 S 10 38 58.068 -47 32 41.32 V C57
2021-03-16 06:44:06 s 1 -165976.03 2 +288397.87 1870.0 C57
2021-03-16 06:54:06 S 10 38 58.121 -47 32 22.56 V C57
2021-03-16 06:54:06 s 1 -166216.72 7 +287965.69 360.0 C57
2021-03-16 07:04:06 S 10 38 57.910 -47 32 02.76 V C57
2021-03-16 07:04:06 s 1 -166456.79 1 +287532.39 7680.0 C57
2021-03-16 07:14:06 S 10 38 58.238 -47 31 42.53 V C57
2021-03-16 07:14:06 s 1 -166696.22 0 +287097.96 3810.0 C57
2021-03-16 07:24:06 S 10 38 58.099 -47 31 22.51 V C57
2021-03-16 07:24:06 s 1 -166935.01 2 +286662.42 8760.0 C57
2021-03-16 07:34:06 S 10 38 57.986 -47 31 01.49 V C57
2021-03-16 07:34:06 s 1 -167173.16 6 +286225.75 2520.0 C57
2021-03-16 07:44:06 S 10 38 58.265 -47 30 42.16 V C57
2021-03-16 07:44:06 s 1 -167410.67 9 +285787.96 5090.0 C57
2021-03-16 07:54:06 S 10 38 57.802 -47 30 25.49 V C57
2021-03-16 07:54:06 s 1 -167647.54 7 +285349.04 6460.0 C57
2021-03-16 08:14:06 S 10 38 57.830 -47 29 41.24 V C57
2021-03-16 08:14:06 s 1 -168119.34 4 +284467.83 5570.0 C57
2021-03-16 08:24:06 S 10 38 57.984 -47 29 24.76 V C57
2021-03-16 08:24:06 s 1 -168354.26 7 +284025.53 3320.0 C57
2021-03-16 08:34:06 S 10 38 57.905 -47 29 01.97 V C57
2021-03-16 08:34:06 s 1 -168588.53 6 +283582.11 9840.0 C57
2021-03-16 08:44:06 S 10 38 57.610 -47 28 45.41 V C57
2021-03-16 08:44:06 s 1 -168822.15 0 +283137.56 5150.0 C57
2021-03-16 08:54:06 S 10 38 57.734 -47 28 20.21 V C57
2021-03-16 08:54:06 s 1 -169055.10 5 +282691.88 9220.0 C57
2021-03-16 09:04:06 S 10 38 57.970 -47 28 00.66 V C57
2021-03-16 09:04:06 s 1 -169287.39 9 +282245.07 2060.0 C57
2021-03-16 09:14:06 S 10 38 57.850 -47 27 40.90 V C57
2021-03-16 09:14:06 s 1 -169519.03 0 +281797.13 3670.0 C57
2021-03-16 09:24:06 S 10 38 57.679 -47 27 21.17 V C57
2021-03-16 09:24:06 s 1 -169749.99 5 +281348.06 4040.0 C57
2021-03-16 09:34:06 S 10 38 57.528 -47 27 03.24 V C57
2021-03-16 09:34:06 s 1 -169980.29 1 +280897.85 3150.0 C57
2021-03-16 09:44:06 S 10 38 57.785 -47 26 42.11 V C57
2021-03-16 09:44:06 s 1 -170209.91 6 +280446.51 1020.0 C57
2021-03-16 09:54:06 S 10 38 57.535 -47 26 21.34 V C57
2021-03-16 09:54:06 s 1 -170438.86 8 +279994.04 7630.0 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)