Trumpler 27-1 is a

red supergiant Red supergiants (RSGs) are stars with a supergiant luminosity class ( Yerkes class I) and a stellar classification K or M. They are the largest stars in the universe in terms of volume, although they are not the most massive or luminous. Betelg ...

star that is a member of the massive, possible

open cluster An open cluster is a type of star cluster made of tens to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way galaxy, and ...

Trumpler-27, where a

blue giant In astronomy, a blue giant is a hot star with a luminosity class of III (giant) or II (bright giant). In the standard Hertzsprung–Russell diagram, these stars lie above and to the right of the main sequence. The term applies to a variety of ...

star, a yellow supergiant star, and two

Wolf–Rayet star Wolf–Rayet stars, often abbreviated as WR stars, are a rare heterogeneous set of stars with unusual spectroscopy, spectra showing prominent broad emission lines of ionised helium and highly ionised nitrogen or carbon. The spectra indicate very ...

s are also located.

Observation history

Trumpler 27-1 was discovered and catalogued when the

(not confirmed then) was first identified in the late 20th century. It has since remained largely unobserved, being featured in the

Gaia Catalogue The ''Gaia'' catalogues are star catalogues created using the results obtained by ''Gaia (spacecraft), Gaia'' space telescope. The catalogues are released in stages that will contain increasing amounts of information; the early releases also mis ...

and other pieces of literature.

Physical properties

Trumpler 27-1 is among the largest stars known, with a radius of over 1,360 solar radii. It is also 360,000 times more luminous than the Sun. This star's spectral type is M0Ia, meaning it possesses a cool temperature of below 3,800 K. So far, Trumpler 27-1 is the only identified

in the

Trumpler 27.

Location

Trumpler 27–1, and the open cluster in which it is located, is in the constellation of

Scorpius Scorpius is a zodiac constellation located in the Southern celestial hemisphere, where it sits near the center of the Milky Way, between Libra to the west and Sagittarius to the east. Scorpius is an ancient constellation whose recognition pred ...

References

{{Stars of Scorpius M-type supergiants Scorpius Suspected variables Durchmusterung objects TIC objects

Observation history

Physical properties

Location

See also

References