Editing Antares (section)

===Antares B===
Antares B is a magnitude 5.5 [[B-type main-sequence star|blue-white main-sequence star]] of spectral type B2.5V; it also has numerous unusual spectral lines suggesting it has been polluted by matter ejected by Antares.<ref name="aaa474_1_229" /> It is assumed to be a relatively normal early-B main sequence star with a mass around {{solar mass|7|link=y}}, a temperature around {{val|18,500|fmt=commas|ul=K}}, and a radius of about {{solar radius|5}}.<ref name=antaresb/> As it falls short of the mass limit required for stars to undergo a [[supernova]], it will likely expand into a [[red giant]] before dying as a massive [[white dwarf]] similar to [[Sirius|Sirius B]].<ref name="kaler" /><ref>{{Cite journal |last=Whittet |first=D. C. B. |date=1999-12-01 |title=A physical interpretation of the 'red Sirius' anomaly |journal=Monthly Notices of the Royal Astronomical Society |volume=310 |issue=2 |pages=355–359 |doi=10.1046/j.1365-8711.1999.02975.x |doi-access=free |bibcode=1999MNRAS.310..355W |issn=0035-8711}}</ref>

Antares B is normally difficult to see in small telescopes due to glare from Antares, but can sometimes be seen in apertures over {{convert|150|mm|in|abbr=off}}.<ref name="schaaf" /> It is often described as green, but this is probably either a [[contrast effect]],<ref name="kaler" /> or the result of the mixing of light from the two stars when they are seen together through a telescope and are too close to be completely resolved. Antares B can sometimes be observed with a small telescope for a few seconds during lunar [[occultation]]s while Antares is hidden by the Moon.<ref name="burnham" /> Antares B appears a profound blue or bluish-green color, in contrast to the orange-red Antares.<ref name="Johnson1879" /><ref name="burnham" /><ref name=crossley/>