B-type asteroid

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B-type asteroid Bennu imaged by OSIRIS-REx from a range of 24 km (15 mi)

B-type asteroids are a relatively uncommon type of

inclination Pallas family which includes the third-largest asteroid 2 Pallas. They are thought to be primitive, volatile-rich remnants from the early Solar System. There are 65 known B-type asteroids in the SMASS classification,[2]
and 9 in the Tholen classification as of March 2015.

Characteristics

Generally similar to the

organic polymers, magnetite, and sulfides. The closest matches to B-class asteroids have been obtained on carbonaceous chondrite meteorites that have been gently heated in the laboratory
.

The majority of asteroids that have been observed to display cometary-like activity are B-types.[3][4] Some of these objects display indications of aqueous alteration in the past, and they may have incorporated significant amounts of water ice.[1]

Well studied B-type asteroids

Pallas, the largest B-type asteroid

Asteroid 101955 Bennu is a B-type asteroid which is the target of the OSIRIS-REx mission. The mission seeks to characterize the asteroid by mapping the surface, studying the Yarkovsky effect, and retrieving a sample of the asteroid to return in 2023. The spacecraft was launched in 2016 and has been at Bennu since December 2018.

Other B-type asteroids include:

See also

References

  1. ^
    S2CID 724871
    .
  2. JPL Solar System Dynamics
    . Retrieved 2015-06-17.
  3. doi:10.1051/0004-6361/201118142
    .
  4. doi:10.1051/0004-6361/201220680
    . 1. Introduction: "the majority of asteroids that have been observed to display cometary-like activity are B-types"


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