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Ceres, the largest asteroid, is a G-type

G-type asteroids are a relatively uncommon type of carbonaceous asteroid that makes up approximately 5% of asteroids. The most notable asteroid in this class is 1 Ceres.

Characteristics

Generally similar to the C-type objects, but contain a strong ultraviolet absorption feature below 0.5 μm. An absorption feature around 0.7 μm may also be present, which is indicative of phyllosilicate minerals such as clays or mica.

In the SMASS classification the G-type corresponds to the Cgh and Cg types, depending on the presence or absence (respectively) of the absorption feature at 0.7 μm. The G-type, C-type and some rare types are sometimes collected together into a wider C-group of carbonaceous asteroids.

References

D. J. Tholen Asteroid taxonomic classifications in Asteroids III

Asteroids

Main

Distribution

Trojans
Interior to Earth
Near-Earth
- Aten
- Amor
- Apollo
- Atira
- Earth-crossers
Between Earth and the main belt
- Mars crossers
Asteroid belt
- Kirkwood gap
- Active asteroids
Outer Solar System, does not include distant minor planets
Centaurs
Exoasteroids

C-group
- B-type
- F-type
- G-type
- C-type
S-type
X-group
- M-type
- E-type
- P-type

small classes
- A-type
- D-type
- J-type
- T-type
- Q-type
- R-type
- V-type

SMASS

C-group
- B-type
- C-type
- Cg
- Ch
- Cgh
- Cb
S-group
- A-type
- Q-type
- R-type
- K-type
- L-type
- S-type
- Sa
- Sq
- Sr
- Sk
- Sl

X-group
- X-type
- Xe
- Xc
- Xk
small types
- T-type
- D-type
- Ld-type
- O-type
- V-type

Exploration

Lists

Category

Small Solar System bodies

Minor planets

Designation Groups List Moon Meanings of names
Asteroid	Active Aten asteroid Asteroid belt Family Jupiter trojan Near-Earth Spectral types
Distant minor planet	Centaur Neptune trojan Damocloid Trans-Neptunian object Detached Kuiper belt Oort cloud Scattered disc

Comets

Other

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Categories:

Characteristics

See also

References