- (69988) 1998 WA31
Infobox Planet | discovery=yes | physical_characteristics=yes | bgcolour=#FFFFC0
name=mp|(69988) 1998 WA|31
discoverer=Marc W. Buie
discovered=November 18 ,1998
mp_name=mp|(69988) 1998 WA|31
alt_names="none"
mp_category=Trans-Neptunian object (Res 2:5)
epoch=
aphelion=78.179 AU
perihelion=31.473 AU
semimajor=54.826 AU
eccentricity=0.426
period=
avg_speed=
inclination=9.5°
asc_node=20.8°
mean_anomaly=35.9°
arg_peri=309.2°
dimensions=139 km
mass=
density=
surface_grav=
escape_velocity=
sidereal_day=
albedo=0.09 (assumed)
single_temperature=
spectral_type=
abs_magnitude=7.5mp|(69988) 1998 WA|31, also written as (69988) 1998 WA31, is a
Trans-Neptunian object that resides in thescattered disc region beyond theKuiper belt . It was discovered onNovember 18 ,1998 byMarc W. Buie at theKitt Peak National Observatory .It is in a 2:5
orbital resonance with theplanet Neptune .References
* 1. http://cfa-www.harvard.edu/iau/lists/Centaurs.html
* 2. http://www.johnstonsarchive.net/astro/tnoslist.html
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