30 million light years. This unguided image was taken using a ten inch, F4.8 reflector. 60
second sub frames and matching dark frames were used. A total exposure time of 30 minutes
for each RGB colour channel was used.This was taken under a very clear moonless sky, with
only light pollution to contend with:
NGC4631.NGC4656/51 The Whale and Hocketstick galaxies. This pair of edge on galaxies lie
in the constellation of Canes Venatici at a distance of about thirty million light years.
This image was taken with a ten inch, f/4.8 Newtonian with PHD auto-guiding. The exposure
times were forty minutes using RGB filters with five minute sub frames and matching dark
frames. The camera was set on times 2 bin mode with the temperature set to -15 degrees
Celcius:
