Screen 1

The fourth bright star in the constellation of rabbit

Screen 1 (μ Lep, rabbit μ)^[2] It's the southern constellation Aplysia The fourth bright star in^[3] ， Apparent magnitude About 3.259, making this star in the southern hemisphere visible to the naked eye. parallax The distance between the star and the earth is estimated to be 186 light-years (57 seconds).^[1]

Chinese name: Screen 1
Foreign name: Mu Leporis
Alias: 5 Leporis^[1]
Classification: fixed star

surface temperature: 12800 K^[1]
Apparent magnitude: 2.97 to 3.41, etc^[3]
Distance from ground: 186 light years^[1] （±6）
Radius: 3.39 ± 0.16 R☉^[1]

catalog

one Physical characteristics
two observation data

Physical characteristics

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The stellar spectrum of this star is B9IV: HgMn, however, the uncertain spectral value is displayed after ':'. Brightness classification IV shows that this is a sub giant star, a hydrogen fuel that has exhausted its core, and a star that is becoming a giant star. Its radius is 3.4 times that of the sun, and its shell Effective temperature It is 12800K.^[1]

observation data

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Screen 1 is suspected to have a cycle of about 2 days Alpha ² type variable star of Canis However, it has not been confirmed. The spectrum of this star shows that mercury and manganese Therefore, HgMn is marked on the star classification. X-ray radiation was detected 0.93 angular seconds away from the star, estimated by the distance from screen 1 to the earth, which is equal to the projection distance of 52 astronomical units. The source of this radiation source may be the companion star of Pingyi: it may be a main sequence star or a smaller star. The X-ray brightness of this object is (4.4 ± 0.1) × 10 twenty-nine erg s –1 。^[1]

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