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Iota1 Normae

Iota<sup>1</sup> Normae (ι<sup>1</sup> 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&nbsp;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&nbsp;years, a semimajor axis of 0.33&nbsp;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&nbsp;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&nbsp;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.

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