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Thread: Barnards Star and Quasar 3C 273 with my 6 inch telescope

  1. #1
    Join Date
    Dec 2005
    Posts
    405

    Barnards Star and Quasar 3C 273 with my 6 inch telescope

    What can i expect to see of Barnards Star and the famous quasar 3C 273 with my dynamax 6 inch telescope? Or is Barnards Star just visible with the unaided eye? Big thanks for anyone who can help me with this.

    Greetings from,

    Denis12

  2. #2
    Join Date
    Oct 2001
    Posts
    7,817
    At magnitude 9.55, Barnard's star is not visible to the naked eye. In fact, no red dwarf is visible to the naked eye. Through a 6" scope, it will look like a faint dot.

    Speaking of faint, 3C 273 is magnitude 12.8, which is about a half a magnitude brighter than the limit for a 6" scope. If you can see it at all, it will be very, very faint!

    FWIW, I did not know this information off the tot of my head, but found it very easily by Googling for "Barnard's star". "3C 273" and "limiting msgnitude".

  3. #3
    Join Date
    Sep 2003
    Posts
    4,750
    Observing Barnard's Star requires a good finder chart. I've been following its progress (it has the highest known proper motion of any star - it moves approximately one lunar diameter or about half a degree every 175 years) for well over a decade. Through larger instruments, Barnard's Star has a faint ruddy color. (Its spectral class is M4V.)

    The quasar 3C 273 is not much to look at but it should be visible, with difficulty, through your telescope from a dark sky location. I've seen it with my 101mm (4") Tele Vue refractor but I was at one of the darkest sites east of the Mississippi (Cherry Springs State Park) at the time.

    Dave Mitsky

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