Hemisphere:  Northern  ·  Constellation: Auriga (Aur)  ·  Contains:  PK173+02.1  ·  Sh2-235
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Sh2-235 in HSSrgb, 



    
        

            Jose Carballada
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Sh2-235 in HSSrgb

Getting plate-solving status, please wait...
Sh2-235 in HSSrgb, 



    
        

            Jose Carballada
Powered byPixInsight

Sh2-235 in HSSrgb

Imaging telescopes or lenses: Altair Astro RC250-TT 10" RC Truss Tube  ·  Teleskop Service TS Photoline 107mm f/6.5 Super-Apo

Imaging cameras: ZWO ASI183MM-Cool  ·  ZWO ASI1600MM-Cool

Mounts: Skywatcher EQ6R Pro  ·  Mesu 200 Mk2

Guiding telescopes or lenses: Celestron OAG Deluxe  ·  Teleskop Service TSOAG9 Off-Axis Guider

Guiding cameras: ZWO ASI290 Mini  ·  ZWO ASI174 Mini

Focal reducers: Riccardi Reducer/Flattener 0.75x  ·  Telescope-Service TS 2" Flattener

Software: Pleiades Astrophoto PixInsight  ·  Seqence Generator Pro

Filters: Astrodon HA 36mm - 5nm  ·  Astrodon O-III 36mm - 5nm  ·  Astrodon S-II 36mm - 5nm  ·  Astrodon R Gen.2 E-series 36mm  ·  Astrodon G Gen.2 E-series 36mm  ·  Astrodon B Gen.2 E-series 36mm  ·  Astrodon L Gen.2 E-series 36mm

Accessory: ZWO EFW  ·  MoonLite NiteCrawler WR30  ·  MoonLite CSL 2.5" Focuser with High Res Stepper Motor


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

Frames:
Astrodon B Gen.2 E-series 36mm: 90x30" (45') (gain: 75.00) -20C bin 1x1
Astrodon G Gen.2 E-series 36mm: 90x30" (45') (gain: 75.00) -20C bin 1x1
Astrodon HA 36mm - 5nm: 186x600" (31h) (gain: 200.00) -20C bin 1x1
Astrodon R Gen.2 E-series 36mm: 90x30" (45') (gain: 75.00) -20C bin 1x1
Optolong SII 6.5nm 36mm: 121x600" (20h 10') (gain: 113.00) -20C bin 1x1

Integration: 53h 25'

Avg. Moon age: 18.25 days

Avg. Moon phase: 55.61%


Astrometry.net job: 3221076

RA center: 5h 41' 5"

DEC center: +35° 50' 0"

Pixel scale: 1.007 arcsec/pixel

Orientation: -90.325 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

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

Uploaded: ...

C

Description: complete new process

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D

Description: new process

Uploaded: ...

E

Description: new level process

Uploaded: ...

F

Description: new colour balance

Uploaded: ...

Sky plot

Sky plot

Histogram

Sh2-235 in HSSrgb, 



    
        

            Jose Carballada