title: Pyephem, define and plotting stars for different epochs
body: <p>I'm trying to make a program that displays stars of my choice, from different locations on Earth and at different epochs. I've got it working so that I can display objects from ephem's database, such as Venus, but the stars I want to display aren't in the catalogue. How would I define the stars in Capricornus so they read to the program like any other star?</p>
  
  <p>I've researched around and found articles similar to what I want:</p>
  
  <p>The list of stars available:
  <a href="https://github.com/brandon-rhodes/pyephem/blob/master/ephem/stars.py" rel="nofollow">https://github.com/brandon-rhodes/pyephem/blob/master/ephem/stars.py</a></p>
  
  <p>Sample script plotting Big Dipper:<a href="http://nbviewer.ipython.org/github/brandon-rhodes/pyephem/blob/master/issues/github-issue-61.ipynb#" rel="nofollow">http://nbviewer.ipython.org/github/brandon-rhodes/pyephem/blob/master/issues/github-issue-61.ipynb#</a></p>
  
  <p>The code I'm using to generate observation site and desired objects:</p>
  
  <pre><code>#Define observer location
  gatech = Observer()
  gatech.lon = '-3.0' #Longitude positive in the East
  gatech.lat = '+51.0' #Latitude positive in the North
  gatech.elevation = 0 
  
  #Set date of observation and then prints Altitude and Azimuth of object
  gatech.date = ((2000, 1, 1, 9, 30, 0)) #Year,month,day,hour,minute,second
  
  v1 = Venus(gatech)
  v1altrad = ('%.12f' % float(v1.alt))
  v1azrad = ('%.12f' % float(v1.az -3.14159))
  </code></pre>
  
  <p>And inputting this into a matplotlib function produces the correct image.</p>
  
  <p>As far as I know, I just need to figure out how to define the stars I want to see, as everything else appears to work. Any help plotting the stars of Capricorn would be greatly appreciated.</p>