Sirius is without doubt, the most popular of all double stars; even though most amateurs have never seen it resolved.  The problem is that even though the companion is not too close to its primary for small scopes, the overwhelming difference in brightness (9 magnitudes) makes it a challenge for all observers.  But it is worth trying. Resolving Sirius is one of the most rewarding observations an amateur can make.

The pair, which was at its closest separation in 1993 - 1994, is widening noticeably on a year-to-year basis.  However, it should be visible now in a 12" to 24" instrument.

The trick is to be prepared.  You will need an excellent telescope, a steady night, good vision, a road map (provided above), and lots of patience. Do  your homework, which includes:

• Clean your optics. Eyepieces and Barlows especially. They should be free of all traces of grease and oily film. Use compressed air, alcohol, and Q-Tips to clean them.
  

• Choose a very steady night, so that you can use your highest powers.  Start with 50X per inch of aperture, and work downwards if that is required.
  

• Know where to look.  The chart  will show you what to expect. 

Under extreme magnification, Sirius will look like a can of glowing worms, writhing and squirming.  But every now and then, when moments of good seeing allow, the image will shrink , and the tiny pinpoint of light which is the "pup" will be revealed