View source for O-type asteroid

{{Short description|Asteroid spectral type}}
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 [[micrometre|μm]].<ref name="Bus2002">S. J. Bus and R. P. Binzel, [http://vigarano.ep.sci.hokudai.ac.jp/shogo/adv_geochemistry2015/Week%204/Background%20reading/Bus%20and%20Binzel%202002.pdf Phase II of the Small Main-belt Asteroid Spectroscopy Survey: A feature-based taxonomy], ''Icarus'', Vol. 158, pp.&nbsp;146 (2002).</ref>

== 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 asteroid]]s from the [[Apollo asteroid|Apollo]], [[Aten asteroid|Aten]] or [[Amor asteroid|Amor]] group:
{| class="wikitable"
! [[Minor planet designation|Designation]] !! Class !! Diam. || Refs
|-
| [[3628 Božněmcová]] || {{small|main-belt}} || {{small|6.914 km}} || {{small|{{MPC|3628}}{{·}}{{JPL|3628}}}}
|-
| [[4034 Vishnu]] || {{small|Apollo}} || {{small|0.42 km}} || {{small|{{MPC|4034}}{{·}}{{JPL|4034}}}}
|-
| [[4341 Poseidon]] || {{small|Apollo}} || {{small|2 km}} || {{small|{{MPC|4341}}{{·}}{{JPL|4341}}}}
|-
| [[5143 Heracles]] || {{small|Apollo}} || {{small|4.843 km}} || {{small|{{MPC|5143}}{{·}}{{JPL|5143}}}}
|-
| {{mpl|(8201) 1994 AH|2}} || {{small|Apollo}} || {{small|1.859 km}} || {{small|{{MPC|8201}}{{·}}{{JPL|8201}}}}
|-
| {{mpl|(162385) 2000 BM|19}} || {{small|Aten}} || {{small|0.57 km}} || {{small|{{MPC|162385}}{{·}}{{JPL|162385}}}}
|-
| {{mp|1997 RT}} || {{small|Amor}} || {{small|0.3 km}} || {{small|{{MPC|1997+RT}}{{·}}{{JPL|1997+RT}}}}
|-
! colspan=4 style="font-weight: normal; padding: 8px; font-size: smaller;" | Diameter: averaged estimates only; may change over time
|}

== See also ==
* [[Asteroid spectral types]]

== References ==
{{reflist}}

{{Asteroids}}
{{Small Solar System bodies}}

[[Category:Asteroid spectral classes]]
[[Category:O-type asteroids (SMASS)|*]]


{{beltasteroid-stub}}