Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Angular Separation Between Two Stars

  1. Sep 23, 2005 #1
    :confused: I aim trying to do a problem where I have 2 Equatorial Coordinates, and I need to find the angular distance in between this two points. Thanks in advance. :confused:
     
  2. jcsd
  3. Sep 23, 2005 #2

    lightgrav

    User Avatar
    Homework Helper

    Do you mean RA and dec?

    If the stars are close to one another you can use Pythagoras.
    declination is already in actual degrees;
    Right Ascension must be converted from hours to degrees,
    (15 deg/hr) cos(dec) , to compensate for meeting at the pole.

    If the stars are far apart, you'll have to make a great circle
    that passes through them both.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook