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Contains:  PK173+02.1, Sh2-235
Getting plate-solving status, please wait...
Sh2-235 in HSSrgb, 



    
        

            Jose Carballada
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Sh2-235 in HSSrgb

Technical card


Dates:Dec. 25, 2019Jan. 3, 2020Jan. 12, 2020Jan. 15, 2020

Frames:
Astrodon B Gen.2 E-series 36mm: 90x30" (gain: 75.00) -20C bin 1x1
Astrodon G Gen.2 E-series 36mm: 90x30" (gain: 75.00) -20C bin 1x1
Astrodon HA 36mm - 5nm: 186x600" (gain: 200.00) -20C bin 1x1
Astrodon R Gen.2 E-series 36mm: 90x30" (gain: 75.00) -20C bin 1x1
Optolong SII 6.5nm 36mm: 121x600" (gain: 113.00) -20C bin 1x1

Integration: 53.4 hours

Avg. Moon age: 18.25 days

Avg. Moon phase: 55.61%


Astrometry.net job: 3224550

RA center: 5h 41' 5"

DEC center: +35° 50' 0"

Pixel scale: 1.007 arcsec/pixel

Orientation: -90.326 degrees

Field radius: 0.408 degrees


Resolution: 2328x1760

Locations: AAS Montsec, Àger, Lleida, Spain

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

Another object from this nice catalogue of faint nebula.
Long integration of 53 hours using two narrow band filters mainly, searching the limits of the equipment and my own process skills.
It's not a popular target probably because is difficult and usually is not showing so much detail due to the high dynamic range, the core is bright, really bright compare with the faint surroundings.

Sh2-235 is the most central and brightest nebula of an H II region known as G174+2.5; it is observed in the direction of the northern part of the Aur OB1 association and includes the nebulae catalogued as Sh2-231, Sh2-232, Sh2-233 and Sh2-235, identified as individual nebulae in the 1959 census of H II regions. Although in the optical images they appear as distinct nebulae, in reality they all belong to a single giant molecular cloud, of which some parts appear illuminated by young and hot stars. This cloud is located in Perseus' Arm at a galactic latitude that places it slightly off-center with respect to the center of the galactic disk; the distance measurements indicate a range between 1600 and 2000 parsec, so it is normally indicated as about 1800 parsec (5870 light years).

(descri. credits to wiki.it https://it.wikipedia.org/wiki/Sh2-235)

Comments

Author

Carballada
Jose Carballada
License: Attribution-NonCommercial-ShareAlike Creative Commons
1242
Like

Revisions

  • Sh2-235 in HSSrgb, 



    
        

            Jose Carballada
    Original
  • Sh2-235 in HSSrgb, 



    
        

            Jose Carballada
    B
  • Sh2-235 in HSSrgb, 



    
        

            Jose Carballada
    C
  • Sh2-235 in HSSrgb, 



    
        

            Jose Carballada
    D
  • Sh2-235 in HSSrgb, 



    
        

            Jose Carballada
    E
  • Final
    Sh2-235 in HSSrgb, 



    
        

            Jose Carballada
    F

B

Description: more aggressive SCNR

C

Description: complete new process

D

Description: new process

E

Description: new level process

F

Description: new colour balance

Sky plot

Sky plot

Histogram

Sh2-235 in HSSrgb, 



    
        

            Jose Carballada