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]
^
abcKourniotis, M.; Kraus, M.; Arias, M. L.; Cidale, L.; Torres, A. F. (2018). "On the evolutionary state of massive stars in transition phases in M33". Monthly Notices of the Royal Astronomical Society. 480 (3): 3706.
arXiv:1808.00008.
Bibcode:
2018MNRAS.480.3706K.
doi:
10.1093/mnras/sty2087.
^Humphreys, R. M.; Sandage, A. (November 1980). "On the stellar content and structure of the spiral Galaxy M33". The Astrophysical Journal Supplement Series. 44: 319.
Bibcode:
1980ApJS...44..319H.
doi:
10.1086/190696.
ISSN0067-0049.