XTE J1550−564

XTE J1550−564, sometimes abbreviated to J1550 and also known as V381 Normae, is a low-mass X-ray binary in the constellation Norma. It is composed of a black hole around 10 times as massive as the Sun,^[3] and a star of spectral type K3III. The black hole fires out jets of matter that are thought to arise from an accretion disk, and is hence known as a microquasar.^[3]

XTE J1550−564

The visual band light curve of a flare on V381 Normae, adapted from Poutanen et al. (2014)[1]
Observation data Epoch J2000      Equinox J2000
Constellation	Norma
Right ascension	15h 50m 58.78s[2]
Declination	−56° 28′ 35.0″[2]
Apparent magnitude (V)	16.6
Other designations
V381 Normae[2]
Database references
SIMBAD	data