Trumpler 27 is a 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 ...
in the southern constellation
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 ...
. If it exists, it is a few thousand light-years away from the Sun, with estimates ranging from 3,900 light-years (1,210 kiloparsecs)
to 6,800 light-years (2,100 kiloparsecs)
[ The name refers to ]Robert Julius Trumpler
Robert Julius Trumpler (October 2, 1886 – September 10, 1956) was a Swiss-American astronomer.
Career
Born in Switzerland in October 2, 1886, where Trumpler did initial schooling. Trumpler entered the Universität Zürich but later transferre ...
's catalog of open clusters, published in 1930.Sagittarius Arm
Sagittarius ( ) may refer to:
*Sagittarius (constellation)
*Sagittarius (astrology), a sign of the Zodiac
* Sagittarius of Gap, a 6th century bishop
*Sagittarius A*, the supermassive black hole at the center of the Milky Way galaxy
Ships
*'' S ...
, still surrounded by interstellar matter.[ The light from the stars is heavily extinguished and reddened by intervening interstellar dust.]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 with a spectral type
In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the ...
of M0Ia. Stars #28 and #105 are Wolf-Rayet stars.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 with a spectral type of O8III((f)), may be one of the most luminous stars known, with a bolometric magnitude of −10.5.[ Star #102 is known as V925 Scorpii or HD 159378,]
See also
* List of most massive stars
This is a list of the most massive stars that have been discovered, in solar mass units ().
Uncertainties and caveats
Most of the masses listed below are contested and, being the subject of current research, remain under review and subject to con ...
References
{{Scorpius
Open clusters
Scorpius