- (69990) 1998 WU31
Infobox Planet | discovery=yes | physical_characteristics=yes | bgcolour=#FFFFC0
name=mp|(69990) 1998 WU|31
discoverer=Marc W. Buie
discovered=November 18 ,1998
mp_name=mp|(69990) 1998 WU|31
alt_names="none"
mp_category=TNO (plutino )
epoch=
aphelion=46.268 AU
perihelion=31.885 AU
semimajor=39.077 AU
eccentricity=0.184
period=
avg_speed=
inclination=6.6°
asc_node=237.2°
mean_anomaly=34.1°
arg_peri=140.9°
dimensions=111 km
mass=
density=
surface_grav=
escape_velocity=
sidereal_day=
albedo=0.09 (assumed)
single_temperature=
spectral_type=
abs_magnitude=8.0mp|(69990) 1998 WU|31, also written as (69990) 1998 WU31 is a TNO that resides in the
Kuiper belt . It was discovered onNovember 18 ,1998 byMarc W. Buie atKitt Peak National Observatory Since it is in a 2:3
orbital resonance with theplanet Neptune , it has been classified as aplutino .References
* 1. http://cfa-www.harvard.edu/iau/lists/TNOs.html
* 2. http://www.johnstonsarchive.net/astro/tnoslist.html
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