Theta Normae

θ Normae, Latinised as Theta Normae, is a binary star system in the constellation Norma. It has an apparent visual magnitude of 5.13 and is visible to the naked eye as a faint, blue-white-hued point of light. Based upon an annual parallax shift of $1.4$ as seen from Earth, this system is located about 352 light-years from the Sun. At that distance, the visual magnitude of these stars is diminished by an extinction of 0.45 due to interstellar dust.

Chini et al. (2012) identified this as a single-lined spectroscopic binary system. The visible component is a B-type main-sequence star with a stellar classification of B8 V. It is about 17 million tears old and is spinning rapidly with a projected rotational velocity of 251 km/s. The star has 3.6 times the mass of the Sun and 3.05 times the Sun's radius. It is radiating about 184 times the Sun's luminosity from its photosphere at an effective temperature of $9.27 mas$. This system displays an infrared excess, suggesting a debris disk is orbiting at a mean radius of $12,341 K$ with a temperature of 220 K.