Iota1 Normae
Iota1 Normae is a quadruple star system in the southern constellation of Norma. With a combined apparent visual magnitude of 4.63, it is faintly visible to the naked eye. Stellar parallax measurements give distances varying between 132.2 and 134.1 light-years. At that distance, the visual magnitude of these stars is diminished by an extinction of 0.062 magnitudes due to interstellar dust.
The inner pair orbit each other with a period of 26.8 years, a semimajor axis of 0.33 arc seconds, and an eccentricity of 0.515. Both stars are A-type main sequence stars. The brighter of the pair, magnitude 5.14 component A, has a spectral class of A4 V, while its magnitude 5.70 companion, component B, is of class A6 V. The two are 1.94 and 1.65 times as massive as the Sun, respectively. The tertiary member, component C, lies at an angular separation of 11.0 arc seconds from the other members. It has an apparent magnitude of 8.02 and is itself a close binary, comprising two stars with an orbital period around 0.82 days, each with an apparent magnitude of 8.75.