Tuesday, 29 December 2020 16:25


Rate this item
(0 votes)
Mira Mira

Mira or Omicron Ceti is a red giant star in Cetus. Prototype for a class of red giant variable stars that pulsate over periods of 100 to 1,000 days. Mira itself pulsates over 331.65 days going from a magnitude 2.0 down to 10.1. The star also undergoes a helium flash period about every 10,000 years. A white dwarf also is in orbit around Mira at 70 AU, and material lost from Mira is accreated by the white dwarf. Not massive enough to end in a black hole, it will eventually lose its out shells and become a white dwarf itself. As it plows through space, the mass lost forms a comet like tail and shock wave bubble in its direction of travel.

Additional Info

  • Constellation: Cetus
  • Right Ascension: 02h 19m 20.79210s
  • Declination: –02° 58′ 39.4956″
  • Distance (Lightyears): 300
  • Telescope: Orion ED80cft Refractor
  • Camera: ZWO ASI071 OSC cmos
  • Magnitude: 2.0 - 10.1
  • Galaxy Type: undefined
  • Variable Type: Mira
  • B-V Color Index: +1.53
Read 413 times Last modified on Tuesday, 29 December 2020 16:30
More in this category: « Algol SS Vir »