[astroflask]

For sufficiently dim targets, you absolutely need minutes long exposure. If you go for shorter bursts, you face two main challenges:

1) Not enough photons reach the sensor to distinguish the object you are trying to photograph from the noise floor of the sensor. This is by far the biggest reason to go for a tracking mount.

2) You bog your computer down in post processing. 50x1 minute images are far simpler to align than 500x6 seconds images.

Combine (1) and (2), and there's barely any reason to go for untracked shots. As for satellites, planes, clouds, or other kind of transient phenomena that can potentially ruin a shot, that's where you apply some kind of clipping over data (usually sigma clipping or some variation of it) and problem solved.