Theta Volantis, Latinized from θ Volantis, is a solitary star in the southern constellation of

Volans Volans is a constellation in the southern sky. It represents a flying fish; its name is a shortened form of its original name, Piscis Volans. Volans was one of twelve constellations created by Petrus Plancius from the observations of Pieter Dirk ...

. Based upon parallax measurements, is approximately 240

light years A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 1012 ...

from the

Sun The Sun is the star at the center of the Solar System. It is a nearly perfect ball of hot plasma, heated to incandescence by nuclear fusion reactions in its core. The Sun radiates this energy mainly as light, ultraviolet, and infrared radi ...

. It has an

apparent visual magnitude Apparent magnitude () is a measure of the brightness of a star or other astronomical object observed from Earth. An object's apparent magnitude depends on its intrinsic luminosity, its distance from Earth, and any extinction of the object's lig ...

of 5.19, which is bright enough to be faintly visible to the naked eye. Theta Volantis is an

A-type main sequence star An A-type main-sequence star (A V) or A dwarf star is a main-sequence (hydrogen-burning) star of spectral type A and luminosity class V (five). These stars have spectra defined by strong hydrogen Balmer absorption lines. They measure between 1 ...

with a stellar classification of A0 V and a mass around 2.3 times that of the Sun. It is a young star with an estimated age of a few hundred million years, and is spinning rapidly with a

projected rotational velocity Stellar rotation is the angular motion of a star about its axis. The rate of rotation can be measured from the spectrum of the star, or by timing the movements of active features on the surface. The rotation of a star produces an equatorial bulg ...

of 98 km/s. Theta Volantis shines 37 times as brightly as the Sun, with an effective temperature of 8,753 K in its outer atmosphere. The star has two

optical companion In observational astronomy, a double star or visual double is a pair of stars that appear close to each other as viewed from Earth, especially with the aid of optical telescopes. This occurs because the pair either forms a binary star (i.e. a ...

s: a magnitude 15.0 star at an angular separation of 22.10 ″ along a

position angle In astronomy, position angle (usually abbreviated PA) is the convention for measuring angles on the sky. The International Astronomical Union defines it as the angle measured relative to the north celestial pole (NCP), turning positive into the ...

of 58°, and a magnitude 10.64 star at an angular separation of 41.3″ along a position angle of 105° (both as of 2000).

References

{{DEFAULTSORT:Theta Volantis A-type main-sequence stars Volans Volantis, Theta Durchmusterung objects 074405 042425 3460