Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 108  ·  M 97  ·  M108  ·  M97  ·  NGC 3556  ·  NGC 3587  ·  NGC 3594  ·  NGC3594  ·  Owl Nebula  ·  Owl nebula  ·  PK148+57.1
Getting plate-solving status, please wait...
Cosmic perspective : M97 deep version & M108, 



    
        

            Jean-Baptiste Auroux
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Cosmic perspective : M97 deep version & M108

Getting plate-solving status, please wait...
Cosmic perspective : M97 deep version & M108, 



    
        

            Jean-Baptiste Auroux
Powered byPixInsight

Cosmic perspective : M97 deep version & M108

Imaging telescopes or lenses: Takahashi TSA 102

Imaging cameras: Atik ONE 6.0

Mounts: Skywatcher AZ EQ6 GT

Guiding telescopes or lenses: Takahashi TSA 102

Guiding cameras: Atik GP

Focal reducers: Takahashi TOA-RD

Software: Pleiades Astrophoto PixInsight 1.8 Ripley  ·  Photoshop  ·  PHD Guiding 2  ·  Atik Artemis

Filters: Astrodon 3nm OIII  ·  Astronomik LRGB 1,25"  ·  Astrodon 3nm Ha

Accessory: Atik OAG


Dates:April 3, 2021April 4, 2021April 5, 2021

Frames:
Astronomik Ha 6nm: 12x600" (2h) -20C bin 1x1
Astronomik OIII 6nm: 18x600" (3h) -20C bin 1x1
Astronomik OIII 6nm: 12x600" (2h) -20C bin 2x2
Astronomik B 1.25": 24x300" (2h) -20C bin 2x2
Astronomik G 1.25": 24x300" (2h) -20C bin 2x2
Astronomik L 1.25": 36x600" (6h) -20C bin 1x1
Astronomik R 1.25": 24x300" (2h) -20C bin 2x2

Integration: 19h

Darks: ~64

Flats: ~12

Bias: ~101

Avg. Moon age: 22.22 days

Avg. Moon phase: 49.24%

Bortle Dark-Sky Scale: 4.00


Astrometry.net job: 4405298

RA center: 11h 13' 3"

DEC center: +55° 20' 10"

Pixel scale: 1.530 arcsec/pixel

Orientation: -9.445 degrees

Field radius: 0.744 degrees


Resolution: 2729x2188

Data source: Backyard

Description

A classic of the spring sky: the duo of the galaxy M108 with the Owl planetary nebula (M97) in Ursa Major.

M97 is 2000 LY away, while M108 is 32 millions LY away (16.000 times more distant).

I completed the LRGB with exposures with Ha and especially OIII, in order to gain signal on M97: the much more faint outer ring of M97, not so often seen, is visible. Some pretty little galaxies are also visible in the background ! :)

Comments

Revisions

  • Final
    Cosmic perspective : M97 deep version & M108, 



    
        

            Jean-Baptiste Auroux
    Original
    Cosmic perspective : M97 deep version & M108, 



    
        

            Jean-Baptiste Auroux
    B
    Cosmic perspective : M97 deep version & M108, 



    
        

            Jean-Baptiste Auroux
    C

B

Description: OIII layer, showing the outer ring of M97. Raw file + STF for visualization.

Uploaded: ...

C

Description: AAPOD² celebration ! :) (27/04/2021) https://www.aapod2.com/blog/cosmic-perspective-pn-m97-amp-m108

Uploaded: ...

Sky plot

Sky plot

Histogram

Cosmic perspective : M97 deep version & M108, 



    
        

            Jean-Baptiste Auroux