Sunday, 3 March 2013


M108 / NGC3556
Constellation - Ursa Major
Spiral galaxy (SBbc)
Distance - 46MLy
Mag 10.0
SB 13.0

Date 2/3/13
Seeing - Antoniadi III
Transparency - average
SQM 21.72 (LM 6.5)

Telescope 16" f/4.5
EP 14mm Delos x 135 TFoV 0.32˚

Sketch notes
An easy find just below Merak in Ursa Major.
Very tricky to pick out any dark mottled areas of the spiral arms but a couple brief moments showed they were there but really not enough time for me to draw there exact location, after a frustrating hour observing they showed only twice for a few seconds.
Quite suprised how the galaxy still held detail with a 10mm XW at x189 but settled on the 14mm Delos to show a little of the star field.

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