M81 LRGBHa with IFN (Girish Muralidharan)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: Bode's Galaxy · M 81 · NGC 3031

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M81 LRGBHa with IFN

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M81 LRGBHa with IFN

Here is my attempt at a more detailed, close up image of M81 along with the IFN surrounding the galaxy.

The reality is that the galaxies are not surrounded by this dust - the dust is much closer to us than the galaxies - it just happens to look that way. Kind of like looking at the moon on a partially cloudy night.

This dust, unlike classic reflection nebulas - that are usually illuminated by neighboring stars - is actually illuminated by the glow of our own Milky Way galaxy. And yes, it is very very faint. Steve Mandel named this nebulosity Integrated Flux Nebula, or IFN.

Luminance was acquired with ASI183MM Pro - 300' x 48 = 4 hrs

RGB acquired with ASI2600MM Pro - 120' x 210 = 7 hrs

Ha acquired with ASI2600MM Pro - 600' x 20 = 3.5 hrs

Total integration time = 14.5hrs from Bortle 6 (RGBHa) / 4 (luminance)

Original
C
Final
D

C

Description: Adjusted color tone since it was a little pinkish to my taste

Uploaded: ...

D

Description: Tweaked colors on the galaxy a bit..

Uploaded: ...

Milwaukee Astronomical Society

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Status	Advanced success
Started	...
Astrometry.net job	4678215
PixInsight job	026DSDG5ZXJ6N0LKVM2F4WCQPR3UDDKQ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	09h55m34s.50
RA (top/left)	10h00m17s.62
RA (top/right)	09h51m06s.22
RA (bottom/right)	09h50m56s.57
RA (bottom/left)	09h59m54s.67

Dec (center)	+69°03′52″.3
Dec (top/left)	+69°18′17″.5
Dec (top/right)	+69°20′31″.9
Dec (bottom/right)	+68°48′58″.10
Dec (bottom/left)	+68°46′47″.8

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M81 LRGBHa with IFN

M81 LRGBHa with IFN

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M81 LRGBHa with IFN

M81 LRGBHa with IFN

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