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
2021-03-31 06:04:05 S 10 53 59.033 -34 54 43.70 V C57
2021-03-31 06:04:05 s 1 -189603.10 1 +114786.75 7040.0 C57
2021-03-31 06:14:05 S 10 53 59.002 -34 54 17.93 V C57
2021-03-31 06:14:05 s 1 -189496.97 1 +113976.61 70.0 C57
2021-03-31 06:24:05 S 10 53 59.016 -34 53 55.64 V C57
2021-03-31 06:24:05 s 1 -189388.42 2 +113165.01 8420.0 C57
2021-03-31 06:34:05 S 10 53 58.886 -34 53 32.93 V C57
2021-03-31 06:34:05 s 1 -189277.44 0 +112351.95 2080.0 C57
2021-03-31 06:44:05 S 10 53 59.126 -34 53 13.02 V C57
2021-03-31 06:44:05 s 1 -189164.00 9 +111537.43 1010.0 C57
2021-03-31 06:54:05 S 10 53 58.867 -34 52 47.96 V C57
2021-03-31 06:54:05 s 1 -189048.11 5 +110721.46 5180.0 C57
2021-03-31 07:04:05 S 10 53 59.124 -34 52 28.13 V C57
2021-03-31 07:04:05 s 1 -188929.74 0 +109904.03 4570.0 C57
2021-03-31 07:14:05 S 10 53 58.937 -34 52 03.22 V C57
2021-03-31 07:14:05 s 1 -188808.87 1 +109085.15 9140.0 C57
2021-03-31 07:24:05 S 10 53 58.934 -34 51 42.16 V C57
2021-03-31 07:24:05 s 1 -188685.49 0 +108264.82 8850.0 C57
2021-03-31 07:34:05 S 10 53 59.081 -34 51 20.16 V C57
2021-03-31 07:34:05 s 1 -188559.58 3 +107443.03 3690.0 C57
2021-03-31 07:44:05 S 10 53 58.990 -34 50 57.26 V C57
2021-03-31 07:44:05 s 1 -188431.13 4 +106619.79 3610.0 C57
2021-03-31 07:54:05 S 10 53 58.836 -34 50 35.56 V C57
2021-03-31 07:54:05 s 1 -188300.12 5 +105795.10 8590.0 C57
2021-03-31 08:04:05 S 10 53 58.992 -34 50 12.66 V C57
2021-03-31 08:04:05 s 1 -188166.54 2 +104968.96 8600.0 C57
2021-03-31 08:14:05 S 10 53 58.939 -34 49 51.31 V C57
2021-03-31 08:14:05 s 1 -188030.36 6 +104141.37 3600.0 C57
2021-03-31 08:24:05 S 10 53 59.098 -34 49 29.68 V C57
2021-03-31 08:24:05 s 1 -187891.58 3 +103312.33 3560.0 C57
2021-03-31 08:34:05 S 10 53 59.040 -34 49 06.67 V C57
2021-03-31 08:34:05 s 1 -187750.17 5 +102481.84 8440.0 C57
2021-03-31 08:44:05 S 10 53 58.954 -34 48 45.32 V C57
2021-03-31 08:44:05 s 1 -187606.12 5 +101649.91 8220.0 C57
2021-03-31 09:04:05 S 10 53 58.889 -34 48 00.00 V C57
2021-03-31 09:04:05 s 1 -187310.03 1 +99981.724 2330.0 C57
2021-03-31 09:14:05 S 10 53 59.078 -34 47 34.15 V C57
2021-03-31 09:14:05 s 1 -187157.95 2 +99145.466 6590.0 C57
2021-03-31 09:24:05 S 10 53 59.179 -34 47 14.42 V C57
2021-03-31 09:24:05 s 1 -187003.16 3 +98307.768 5610.0 C57
2021-03-31 09:34:05 S 10 53 59.100 -34 46 52.79 V C57
2021-03-31 09:34:05 s 1 -186845.64 5 +97468.633 9350.0 C57
2021-03-31 09:44:05 S 10 53 59.093 -34 46 30.43 V C57
2021-03-31 09:44:05 s 1 -186685.38 1 +96628.061 7780.0 C57
2021-03-31 09:54:05 S 10 53 59.002 -34 46 06.74 V C57
2021-03-31 09:54:05 s 1 -186522.35 2 +95786.055 870.0 C57
2021-03-31 10:04:05 S 10 53 59.069 -34 45 46.26 V C57
2021-03-31 10:04:05 s 1 -186356.54 1 +94942.616 8570.0 C57
2021-03-31 10:14:05 S 10 53 59.050 -34 45 22.86 V C57
2021-03-31 10:14:05 s 1 -186187.92 9 +94097.747 860.0 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)