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Star in the constellation of Triangulum From Wikipedia, the free encyclopedia
M33-013406.63, also known as B416 or UIT301,[4] is a O-type blue evolved supergiant star in the constellation of Triangulum. It is located within the Triangulum Galaxy, which is approximately 2,380,000–3,070,000 light years away from Earth.
Credit: NASA/UH-IfA | |
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Triangulum |
Right ascension | 01h 34m 06.63s[1] |
Declination | +30° 41′ 37.60″[1] |
Apparent magnitude (V) | 16.1[2] |
Characteristics | |
Evolutionary stage | Late O supergiant or candidate LBV[3] |
Spectral type | O[3] |
Variable type | cLBV?[3] |
Astrometry | |
Absolute magnitude (MV) | –9.1 – –9.6[3] |
Absolute bolometric magnitude (Mbol) | –12.2 – –12.7[3] |
Details[2] | |
A | |
Radius | 80[lower-alpha 1] R☉ |
Luminosity | 4.68×106 L☉ |
Temperature | ~30,000 K |
Rotational velocity (v sin i) | 75±5 km/s |
B | |
Radius | 210[lower-alpha 2] R☉ |
Luminosity | 407,380 L☉ |
Temperature | 10,000 K |
Other designations | |
LGGS J013406.63+304147.8, B416 | |
Database references | |
SIMBAD | data |
It is potentially one of the most luminous stars ever discovered, estimated to be approximately between 3 and 10 million times more luminous than the Sun, although it is thought likely to be a multiple star system.[3] Modelling of the spectrum based on some assumptions about the relative sizes of the two stars suggests a secondary around half a million times as luminous as the Sun and the primary over four million times as luminous as the Sun.[2]
M33-013406.3 is embbed within a prominent ring shaped H II region, large regions of Ionized hydrogen clouds with lots of star formation occurring in them.[5][6] It is also near the center of the H II region its in and possible associated with the nebula's origin.[7]
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