Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  M 81  ·  NGC 3031
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M 81 Bode's Galaxy, Holmberg IX Galaxy & faint IFN, 



    
        

            Roland Schliessus
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M 81 Bode's Galaxy, Holmberg IX Galaxy & faint IFN

Getting plate-solving status, please wait...
M 81 Bode's Galaxy, Holmberg IX Galaxy & faint IFN, 



    
        

            Roland Schliessus
Powered byPixInsight

M 81 Bode's Galaxy, Holmberg IX Galaxy & faint IFN

Acquisition details

Dates:
Dec. 30, 2019 ·  Jan. 7, 2020 ·  Feb. 23, 2020 ·  April 22, 2020 ·  April 23, 2020 ·  April 24, 2020 ·  May 18, 2020
Frames:
Baader B 1.25": 10×300(50′) -20°C bin 1×1
Baader G 1.25": 10×300(50′) -20°C bin 1×1
Baader Ha 1.25" 7nm: 6×1200(2h) -20°C bin 1×1
Baader Ha 1.25" 7nm: 20×180(1h) -20°C bin 1×1
Baader L 1.25": 150×30(1h 15′) -20°C bin 1×1
Baader L 1.25": 9×300(45′) -20°C bin 1×1
Baader L 1.25": 6×600(1h) -20°C bin 1×1
Baader R 1.25": 18×300(1h 30′) -20°C bin 1×1
Integration:
9h 10′
Darks:
50
Flats:
50
Bias:
50
Avg. Moon age:
14.44 days
Avg. Moon phase:
17.63%
Bortle Dark-Sky Scale:
4.00

RA center: 09h55m35s.859

DEC center: +69°0333.56

Pixel scale: 0.772 arcsec/pixel

Orientation: -1.039 degrees

Field radius: 0.406 degrees

More info:Open 

Resolution: 2256x3045

File size: 4.0 MB

Data source: Backyard

Description

North up

Messier 81 (NGC 3031 or Bode's Galaxy) is a grand design spiral galaxy about 12 million light-years away, with a diameter of 90,000 light years, in the constellation Ursa Major.

An active galactic nucleus harbors a 70 million M☉ supermassive black hole.

Messier 81 was first discovered by Johann Elert Bode on 31 December 1774.

Consequently, the galaxy is sometimes referred to as "Bode's Galaxy"

Holmberg IX is a dwarf irregular galaxy and a satellite galaxy of M81. The galaxy is named after Erik Holmberg who first described it.

An irregular galaxy is a galaxy that does not have a distinct regular shape, unlike a spiral or an elliptical galaxy. Irregular galaxies do not fall into any of the regular classes of the Hubble sequence, and they are often chaotic in appearance, with neither a nuclear bulge nor any trace of spiral arm structure.

---------------------------- Infos based on Wikipedia ----------------------------


Filter Baader36mm, ungefasst

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