QX Normae is an active
low mass X ray binary in the constellation
Norma Norma may refer to:
* Norma (given name), a given name (including a list of people with the name)
** Norma Lizbeth Ramos, a Mexican bullying victim
Astronomy
*Norma (constellation)
* 555 Norma, a minor asteroid
* Cygnus Arm or Norma Arm, a spiral ...
. It is composed of a neutron star and a star smaller and cooler than the Sun. The X-ray component, known as 4U 1608–52, was discovered in the early 1970s, while the visual component, QX Normae, was discovered in 1977.
By analysing the interstellar extinction between Earth and the system, Güver and colleagues calculated the most likely distance to be 5.8 kpc (19,000 light-years), and the neutron star's mass to be 1.74 ± 0.14 times that of the Sun and radius to be a mere 9.3 ± 1.0 km.
References
{{DEFAULTSORT:QX Normae
Norma (constellation)
Normae, QX