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Messier 81

M81 by Gerard van den Braak


Object data

Object type:

M81 (NGC 3031)

Size:

26.9'x 14.1'

Magnitude:

6.9

Constellation:

Ursa Major

Distance:

14.5 milj LY

 

 

Exposure data

Date, time

2011-02-21  ~23.00 hour

Julian day number

2455 614

Location:

Zuidlaren, Holland

Telescope:

Takahashi FSQ106ED

Camera:

Canon 350D (mod)

Filters:

L: 11x300s

R: -
  G: -
  B: -

Temperature outside:

-3,5 Celcius

Temperature CCD:

-

Binning:

-

SQM  20.38 
Field of view 100% crop of 143' x 91'

Processing tools:

IP,CS3, GradX

Imaged by:

Gerard van den Braak

Notes: