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θ1 Microscopii, Latinized as Theta1 Microscopii, is a suspected binary star system in the southern constellation of Microscopium. It is visible to the naked eye was a faint, white-hued point of light with an apparent visual magnitude of 4.82. The distance to this system is approximately 179 light years based on parallax.
The primary is an α2 CVn variable with a period of 2.125 days and a magnitude ranging from 4.77 to 4.87, as well as an Ap star, a chemically peculiar star with strong metallic lines in its spectrum. It is an A-type main-sequence star with a stellar classification of A7VpSrCrEu, where the suffix notation indicates abundance anomalies of strontium, chromium, and europium. The star is 437 million years old with 2.3 times the mass of the Sun and 2.4 times the Sun's radius. It is radiating 36 times the luminosity of the Sun from its photosphere at an effective temperature of 9,240 K.
Its companion is a magnitude 7.42 star at an angular separation of from the primary along a position angle of 46°, as of 2018.
The primary is an α2 CVn variable with a period of 2.125 days and a magnitude ranging from 4.77 to 4.87, as well as an Ap star, a chemically peculiar star with strong metallic lines in its spectrum. It is an A-type main-sequence star with a stellar classification of A7VpSrCrEu, where the suffix notation indicates abundance anomalies of strontium, chromium, and europium. The star is 437 million years old with 2.3 times the mass of the Sun and 2.4 times the Sun's radius. It is radiating 36 times the luminosity of the Sun from its photosphere at an effective temperature of 9,240 K.
Its companion is a magnitude 7.42 star at an angular separation of from the primary along a position angle of 46°, as of 2018.
References
{{DEFAULTSORT:Theta1 Microscopii A-type main-sequence stars Ap stars Microscopium Microscopii, Theta1 CD-41 14475 203006 105382 8151 Alpha2 Canum Venaticorum variables