A large proportion have orbital elements similar to those of 4 Vesta, either close enough to be part of the Vesta family, or having similar eccentricities and inclinations but with a semi-major axis lying between about 2.18 AU and the 3:1 Kirkwood gap at 2.50 AU. This suggests that most or all of them originated as fragments of Vesta's crust, possibly blasted out by a single very large impact at some point in its history. The enormous southern-hemisphere crater on Vesta is the prime candidate for the impact site .

The V-type asteroids are moderately bright, and rather similar to the more common S-type, which are also made up of stony irons and ordinary chondrites. This rather rare type of asteroid contains more pyroxene than the S-type.

The electromagnetic spectrum has a very strong absorption feature longward of 0.75 μm, another feature around 1 μm and is very red shortwards of 0.7 µm. The visible wavelength spectrum of the V-type asteroids (including 4 Vesta itself) is similar to the spectra of basaltic achondrite HED meteorites.

A J-type has been suggested for asteroids having a particularly strong 1 μm absorption band similar to diogenite meteorites , likely being derived from deeper parts of the crust of 4 Vesta.

Distribution

There is also a scattered group of objects in the general vicinity of the Vesta family but not part of it. These include:

• 809 Lundia Orbits within the Flora family region
• 956 Elisa
• 1459 Magnya Orbits in the outer main belt, too far from Vesta to be genetically related. May be the remains of a different ancient differentiated body that was shattered long ago.
• 2113 Ehrdni
• 2442 Corbett
• 2566 Kirghizia
• 2579 Spartacus — contains a significant portion of olivine, which may indicate origin deeper within Vesta than other V-types.
• 2640 Hallstrom
• 2653 Principia
• 2704 Julian Loewe
• 2763 Jeans
• 2795 Lepage
• 2851 Harbin
• 2912 Lapalma
• 3849 Incidentia
• 3850 Peltier Orbits within the Flora family region
• 3869 Norton
• 4188 Kitezh
• 4278 Harvey Member of Baptistina family.
• 4434 Nikulin
• 4796 Lewis
• 4977 Rauthgundis
• 5379 Abehiroshi

References