IC405 Flaming Star Nebula - Auriga

M81 and M82 - Galaxies in Ursa Major

  1. © Copyright 2014 by Lieven Persoons

Image Data

Optics : TMB 152 @ f/8
Mount : 10micron GM2000
Camera : SBig STL11000
Exposures : total 30h50 : LHaRGB : 710:230:340:240:330 (1x1 bin)
Filters : Lumicon LRGBHa 2”
Location : Nieuwerkerken-Aalst (Belgium) & Verclause** (France)
Date : 10, 28, 29/01/2011 & 9,17/02/2011 & 27**, 28**/02/2011 & 4, 7, 8/03/2011
Comments : a lot of lightpollution @ Aalst


M81 in Ursa Major also know as NGC3031 or BODE17
RK 9h 55’ 36” / DEC +69° 04’ 00”
Size: 21’ x 9.80‘ / Vis m7.9 / Abs m: -21.0
Distance: 10.500.000Lj / diam: 6000Lj

M82 in Ursa Major also know as NGC3034
RK 9h 56’ 06” / DEC +69° 42’ 00”
Size: 9’ x 4‘ / m8.8 / Abs m: -18.74
Distance: 10.500.000Lj / diam: 16000Lj

M82 is a irregular galaxy also known as the Cigar Galaxy (right object in picture) for its elongated visual appearance. M82 is a starbust galaxy with a superwind. In fact, through ensuing supernova explosions and powerful winds from massive stars, the burst of star formation in M82 is driving the prodigous outflow of material. The composite highlights emission from filaments of atomic hydrogen gas in reddish hues. The filaments extend for over 10.000 light years. Some of the gas in the superwind, enriched in heavy elements forged in the massive stars, will eventually escape into intergalactic space. Triggered by a close encounter with nearby large galaxy M81 (left object in picture) the furious burst of star formation in M82 should last about 100 million years or so.
M81 is one of the brightest galaxies in planet Earth’s sky and similar in size to our Milky Way. This image reveals details in the bright yellow core, but at the same time follows fainter features along the galaxy’s gorgeous blue spiral arms and sweeping dust lines.

General Info


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