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Quick easy questionFormula for angular diameter?

  1. Feb 25, 2007 #1
    i am looking for the equation for angular diameter in relation to an objects distance and diameter.
    i need it expressed in arc seconds, not radians.

    anyone know it?
     
  2. jcsd
  3. Feb 25, 2007 #2
    Can you draw a picture and do some trig?
     
  4. Feb 25, 2007 #3

    russ_watters

    User Avatar

    Staff: Mentor

    An arcmin is 1/60th of a degree and an arcesc is 1/60th of an arcmin. Can you draw a picture now...?
     
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