801 Helwerthia
Encyclopedia
801 Helwerthia is a C-type asteroid
orbiting in the Main belt near the Eunomia family
. However, it is not a family member but an un-related interloper in the region because its composition is inconsistent with membership. Its diameter is about 33 km, its albedo around 0.038http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab.
C-type asteroid
C-type asteroids are carbonaceous asteroids. They are the most common variety, forming around 75% of known asteroids, and an even higher percentage in the outer part of the asteroid belt beyond 2.7 AU, which is dominated by this asteroid type...
orbiting in the Main belt near the Eunomia family
Eunomia family
The Eunomia family of asteroids is a large grouping of S-type asteroids named after the Greek goddess Eunomia. It is the most prominent family in the intermediate main belt...
. However, it is not a family member but an un-related interloper in the region because its composition is inconsistent with membership. Its diameter is about 33 km, its albedo around 0.038http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab.