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- 21_Persei abstract "21 Persei is an star in the constellation Perseus. Its apparent magnitude is 5.10. Located around 98.03 parsecs (319.7 ly) distant, it is an hot blue star of spectral type B9. The star is an Alpha2 Canum Venaticorum variable, meaning that the star has a strong magnetic field chromium, silicon, and strontium spectral lines. 21 Persei's period is approximately 2.88 days".
- 21_Persei wikiPageID "41489602".
- 21_Persei wikiPageRevisionID "603327169".
- 21_Persei constell Perseus_(constellation).
- 21_Persei name "21".
- 21_Persei type "B9p...".
- 21_Persei subject Category:B-type_stars.
- 21_Persei subject Category:Flamsteed_objects.
- 21_Persei subject Category:Objects_named_with_variable_star_designations.
- 21_Persei subject Category:Perseus_(constellation).
- 21_Persei type CelestialBody.
- 21_Persei type Star.
- 21_Persei type PhysicalBody.
- 21_Persei comment "21 Persei is an star in the constellation Perseus. Its apparent magnitude is 5.10. Located around 98.03 parsecs (319.7 ly) distant, it is an hot blue star of spectral type B9. The star is an Alpha2 Canum Venaticorum variable, meaning that the star has a strong magnetic field chromium, silicon, and strontium spectral lines. 21 Persei's period is approximately 2.88 days".
- 21_Persei label "21 Persei".
- 21_Persei label "胃宿增三".
- 21_Persei sameAs m.0zwnb8m.
- 21_Persei sameAs Q7212751.
- 21_Persei sameAs Q7212751.
- 21_Persei wasDerivedFrom 21_Persei?oldid=603327169.
- 21_Persei isPrimaryTopicOf 21_Persei.