Epoch J2000 Equinox J2000
|Right ascension||15h 50m 58.78s|
|Declination||−56° 28′ 35.0″|
|Apparent magnitude (V)||16.6|
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, 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.
- "V381 Normae". SIMBAD Astronomical Database. Retrieved 18 August 2015.
- Steiner, James F.; Reis, Rubens C.; McClintock, Jeffrey E.; Narayan, Ramesh; Remillard, Ronald A.; Orosz, Jerome A.; Gou, Lijun; Fabian, Andrew C.; Torres, Manuel A. P. (2011). "The spin of the black hole microquasar XTE J1550-564 via the continuum-fitting and Fe-line methods". Monthly Notices of the Royal Astronomical Society 416 (2): 941–58.