Best A Type

Sirius is the most luminous star visible from Earth. It’s a binary star system consisting of a brilliant white A-type main sequence star and a smaller companion. Located in the constellation Canis Major, Sirius has been observed for millennia, serving as a key navigational reference point for sailor...

Altair is a brilliant A-type main-sequence star located within the constellation Aquila. Situated just 17 light-years from Earth, it’s notable for its exceptionally fast rotation rate. This rapid spin causes a flattening of the star at its poles. Altair represents a key nearby star system and is par...

The prototype of RR Lyrae-type pulsating variable stars in Lyra, widely used as standard candles for measuring distances to globular clusters and the galactic halo.

An A-type star in Pegasus that in 2008 became the first multi-planet system to be directly imaged, with four confirmed giant planet companions revealed.

A young A-type star in Pictor notable for a circumstellar debris disk discovered in 1984 and hosting at least two directly imaged exoplanets.

Fomalhaut is the brightest star in Piscis Austrinus, about 25 light-years away, and hosts a prominent debris disk that yielded one of the first directly imaged exoplanet candidates.

Castor is the second-brightest star in Gemini and a famous sextuple star system about 51 light-years away, comprising three pairs of binary stars.

β Ursae Majoris (Merak) is one of the two pointer stars in the Big Dipper used to locate Polaris, a white A-type star approximately 79 light-years from Earth.

Alioth is the brightest star in Ursa Major, an unusual chemically peculiar star about 83 light-years away and the brightest star in the Big Dipper's handle.

Alpha Draconis, a star in Draco that served as Earth's north pole star around 2700 BCE due to the slow 26,000-year wobble of axial precession.

Delta Scuti is an A-type pulsating variable that is the prototype of the Delta Scuti class of short-period pulsators widely used in asteroseismology.

A hot A-type star ~670 light-years away in Cygnus, hosting KELT-9b, the hottest known hot Jupiter exoplanet, whose dayside temperature exceeds 4,000 K.

Miaplacidus is the second-brightest star in Carina, a blue-white giant about 113 light-years away and one of the brighter stars in the southern sky.

δ Ursae Majoris (Megrez) is the faintest of the seven Big Dipper stars, an A-type main-sequence star marking the junction of handle and bowl, about 81 light-years from Earth.

Alpha Ophiuchi, the brightest star in Ophiuchus, a binary star with a white primary about 47 light-years away; its Arabic name means 'head of the serpent collector'.

Beta Leonis, the second-brightest star in Leo, a white main-sequence star about 36 light-years away and a confirmed member of the Ursa Major Moving Group.

SX Phoenicis is the prototype of SX Phoenicis variables, Population II pulsating stars analogous to Delta Scuti stars and often associated with blue stragglers.

Gamma Geminorum, a white giant in Gemini about 109 light-years away and one of the brighter stars in this zodiacal constellation historically used for timekeeping.

Alphecca (Alpha Coronae Borealis) is the brightest star in the small arc-shaped constellation Corona Borealis, a spectroscopic binary about 75 light-years away.

ι Ursae Majoris (Talitha) is a four-star system in Ursa Major, about 48 light-years from Earth, whose traditional Arabic name refers to the third leap of the gazelle.

Zosma (Delta Leonis) is a blue-white star about 58 light-years away, located on the hip of Leo the Lion and notable as a relatively nearby A-type star.

Zubenelgenubi (Alpha Librae) is a wide naked-eye binary in Libra whose name is Arabic for 'southern claw,' reflecting its origin as part of Scorpius.

Iota Carinae, a yellow-white supergiant in Carina forming part of the False Cross asterism, whose IAU-approved name Aspidiske derives from the Greek for 'small shield'.

Eta Ophiuchi, the second-brightest star in Ophiuchus, a binary system of two white A-type stars with an orbital period of roughly 88 years, located about 88 light-years away.

δ Corvi (Algorab) is the third-brightest star in Corvus, a white A-type main-sequence star approximately 87 light-years from Earth, whose Arabic name also means the crow.

Zeta Sagittarii, a binary star system in Sagittarius and one of the brighter members of the Teapot asterism, whose IAU-approved name Ascella derives from Latin for 'armpit'.

Meridiana is the IAU-approved official name (2016) for α Coronae Australinae, the brightest star in Corona Australina, a white A-type star about 130 light-years from Earth.

α Coronae Australinae (Alphekka Meridiana) is the brightest star in the Southern Crown constellation, a white A-type binary star approximately 130 light-years from Earth.

Gamma Capricorni, a giant star in Capricornus historically used in celestial navigation, whose Arabic-derived name Nashira means 'bearer of good news'.