Is it Rho Cassiopeiae or Mu Sagittarii?
I see in the Stellarium 0.13.0 that Mu Sagittarii has absolute magnitude -11.43!!

  • $\begingroup$ The sun, obviously! But don't think you can look directly at it with the naked eye. Well, you could, but that might be the last thing you see ;). $\endgroup$
    – rubenvb
    Jul 2 '15 at 18:17
  • 2
    $\begingroup$ No, the absolute magnitude of the Sun is only around 4.75. $\endgroup$
    – ProfRob
    Jul 2 '15 at 20:06
  • $\begingroup$ You should see Absolute magnitude $\endgroup$
    – Ab_Sh
    Jul 2 '15 at 20:43
  • 1
    $\begingroup$ @Johannes supernova?! Of course not. Only stars, this contains variable stars. $\endgroup$
    – Ab_Sh
    Apr 9 '16 at 13:21
  • 1
    $\begingroup$ @Johannes From Wikipedia: A supernova is an astronomical event that occurs during the last stellar evolutionary stages of a massive star's life, whose dramatic and catastrophic destruction is marked by one final titanic explosion. For a short time, this causes the sudden appearance of a 'new' bright star, before slowly fading from sight over several weeks or months. $\endgroup$
    – Ab_Sh
    Apr 9 '16 at 17:04

Mu Sagittarii is a star system, not a single star. If that can be included, then Eta Carinae should be included, and it has an absolute magnitude of -12.0. It's a star system about 7,500 light-years from Earth.

It looks like the brightest (absolute magnitude) single star visible to the unaided eye is WR 24 (in Carina Nebula). Its absolute magnitude is −11.1 and apparent magnitude is 6.48, so just barely visible.

source: Wikipedia - List of most luminous known stars

edit: Rho Cassiopeiae's absolute magnitude is -9.5.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.