Algeiba x4 7/6/05 (Re processed 8/8/05)
Collingwood Astronomy Club
Algeiba x4 7/6/05 (Re processed 8/8/05)

Alpha Leo (Regulus) 1.4, 7.7 177" (102mm 52x)

WDS data

Gamma Leo (Algieba) 2.2, 3.5 4.4" 120deg (60mm 175x, 102mm 206x, Webcam uR)

Algieba is a true binary system 100 lightyears away. The stars orbit each other with a period of 620 years. This is first attempt at imaging a double star. Unfortunately, I was looking at the wrong pair. I should have been trying to resolve the two components of the bright star on this image. Instead I have a picture of this binocular pair

The image was taken at 320x240 so it is only 1.8" per pixel so 4.4" separation is only 2.5 pixels. The enlargement below shows the pixels magnified by a factor of eight. You can just about imagine that there are two stars waiting to be discovered.
Things to try next time:
  • Still at 320x240 resolution, try a shorter exposure. In this initial image, I set the exposure for the unrelated 5th magnitude star. If I concentrate on Algieba, I might be able to see both component stars on the screen. Both components are bright (2.2 and 3.5) so it might be possible.
  • Try 640x480 resolution. This resolution gives 0.9" per pixel so the 4.4" separation would be 5 pixels. (Probably the easiest way).
  • Try this at the start of an observing session. My laptop only has 1 hour battery life while running VRecord. I might have to get some sort of extra power supply.
Algeiba x4 7/6/05 Algeiba x4 7/6/05 (Re processed 8/8/05)

WDS data

Links at this site...

Links to other sites...
  • Eagle Creek Observatory - 77 Double Stars in Leo A useful source of data on double stars from Kevin Muenzler
  • LEO DOUBLES Some of Jack Jack Schmidling's photographs
Created 19/8/05
Last Modified