Hemisphere:  Northern  ·  Constellation: Auriga (Aur)  ·  Contains:  B25  ·  PK158+00.1  ·  Sh2-216  ·  Sh2-217  ·  Sh2-219  ·  Sh2-221

Image of the day 09/11/2020

Getting plate-solving status, please wait...
    Sh2-216 - Sh2-221, 



    
        

            Jeffrey K Lovelace
    Powered byPixInsight

    Image of the day 09/11/2020

    Getting plate-solving status, please wait...
      Sh2-216 - Sh2-221, 



    
        

            Jeffrey K Lovelace
      Powered byPixInsight
      Imaging Telescopes Or Lenses
      Takahashi FSQ-106
      Imaging Cameras
      FLI ML-16070M
      Mounts
      Software Bisque Paramount MyT
      Filters
      SRO FSQ (Astrodon B 50mm round E Series) · SRO FSQ (Astrodon G 50mm round E Series) · SRO FSQ (Astrodon R 50mm round E Series) · SRO FSQ (Astrodon O-III 50mm round 3nm) · SRO FSQ (Astrodon S-II 50mm round 3nm) · SRO FSQ (Astrodon Hα 50mm round 5nm)
      Accessories
      Optec Gemini Focusing Rotator · SRO FSQ-106 FW (FLI CFW-2-7 50mm round 7 position filter wheel) · Takahashi 645 QE 0.72x Reducer for FSQ106
      Software
      Open PHD Guiding PHD2 Guiding · PixInsight Processing Software · Photoshop CC · Sequence Generator Pro V3.0 · The SkyX
      Guiding Telescopes Or Lenses
      Stellarvue F50
      Guiding Cameras
      ZWO ASI174mm Mini

      Acquisition details

      Frames:
      Astrodon B 50mm round E Series: 24x300" (2h) -25°C bin 1x1
      Astrodon G 50mm round E Series: 24x300" (2h) -25°C bin 1x1
      Astrodon Hα 50mm round 5nm: 22x1200" (7h 20') -25°C bin 1x1
      Astrodon O-III 50mm round 3nm: 16x1200" (5h 20') -25°C bin 1x1
      Astrodon R 50mm round E Series: 24x300" (2h) -25°C bin 1x1
      Astrodon S-II 50mm round 3nm: 16x1200" (5h 20') -25°C bin 1x1
      Integration:
      24h
      Darks:
      25
      Flats:
      25
      Bias:
      50
      Bortle Dark-Sky Scale:
      1.00
      Mean SQM:
      22.00

      RA center: 04h51m41s.7

      DEC center: +46°5008

      Pixel scale: 13.039 arcsec/pixel

      Orientation: -0.071 degrees

      Field radius: 3.260 degrees

      More info:Open 

      Resolution: 1500x997

      Data source: Own remote observatory

      Remote source: Sierra Remote Observatories

      Description

      Light frames were acquired between August 30th and October 30th 2019.

      Narrowband color: HSO

      Stars: RGB

      ----------------------------------------------------------------------------------------------------------------------------

      Stars’ Lifecycles Play Out in One Patch of Sky

      Sh2-221 and Sh2-216 resulted from different types of star deaths. Sh2-221, at an approximate age of 6,000 years old, is a supernova remnant (SNR). The planetary nebula (PN) Sh2-216, aged at nearly 500,000 years old, has grown exceedingly dim, and its fuzzy edges indicate that it is beginning to dissipate. SNR Sh2-221 is roughly 2,600 ly away and about 130 ly across, while PN Sh2-216 is approximately 400 ly away and 11 ly wide. Therefore, PN Sh2-216 is much closer and smaller in actual size than SNR Sh2-221.

      Sh2-217, Sh2-219, and BFS 44; the three smaller emission nebulae, are all part of the same star forming region.

      Comments