(1:1 pixel-scale image above)

Stack:
4 light
4 dark

Exposure time:
4 second per light
4 second per dark

Exposures made between:
20110307 03:18:39+01:00
20110307 03:21:29+01:00

F Number: 5.6
ISO: 12800
White Balance: Auto
Manipulation: GRIP background correction
Manipulation: waveletted in GIMP
Focal Length: 300.0 mm
Focal Length In 35mm Format: 450 mm
LensType: Sony AF 75-300mm F4.5-5.6 (D)
Camera: SONY SLT-A33 (v1.10)

Wiki's info:
http://en.wikipedia.org/wiki/Vega