O-type asteroid

The rare O-type asteroids have spectra similar to the unusual asteroid 3628 Boznemcová, which is the best asteroid match to the spectra of L6 and LL6 ordinary chondrite meteorites. Their spectra have a deep absorption feature longward of 0.75 μm.^[1]

List

See also: Category:O-type asteroids (SMASS)

Seven asteroids have been classified as O-type by the second Small Main-Belt Asteroid Spectroscopic Survey (SMASSII) and none by Tholen's Eight-Color Asteroid Survey. With the exception of main-belt asteroid 3628 Božněmcová, all other bodies are near-Earth asteroids from the Apollo, Aten or Amor group:

Designation	Class	Diam.	Refs
3628 Božněmcová	main-belt	6.914 km	MPC · JPL
4034 Vishnu	Apollo	0.42 km	MPC · JPL
4341 Poseidon	Apollo	2 km	MPC · JPL
5143 Heracles	Apollo	4.843 km	MPC · JPL
(8201) 1994 AH2	Apollo	1.859 km	MPC · JPL
(162385) 2000 BM19	Aten	0.57 km	MPC · JPL
1997 RT	Amor	0.3 km	MPC · JPL
Diameter: averaged estimates only; may change over time

See also

• Asteroid spectral types

References

1. S. J. Bus and R. P. Binzel, Phase II of the Small Main-belt Asteroid Spectroscopy Survey: A feature-based taxonomy, Icarus, Vol. 158, pp. 146 (2002).