• Sh 2-101 in Cygnus, the Tulip Nebula
    • Sh 2-101 in Cygnus, the Tulip Nebula
    Annotated image
  • Sharpless 101, or The Tulip Nebula, is an emission
  • nebula in Cygnus that lies about 6 kly from us.
  • Hover over the image for an annotated view.
  • Date:  25 August 2025
  • FOV:  cropped to 73' × 48' 40"; Sh 2-101 is about 16' × 9'
  • Telescope:  Celestron C14 SCT (3910mm, f/11)
  • Starizona HyperStar (731.50mm, f/1.9)
  • Guiding:  ZWO183 MM
  • Computer:  ASIair plus 256GB
  • Mount:  iOptron CEM120
  • Camera:  ZWO ASI2600MC Pro Cooled (0°C) Color CMOS with gain 100
  • Pixel size:  3.76 μm
  • Resolution:  1.060 arcsec/pixel
  • Filter:  Optolong UV/IR
  • Stacking:  thirty-two 300 second frames using PixInsight
  • Calibration frames: 20 dark, 20 flat, 20 dark flat
  • Total Time:  2 hours 40 minutes
  • Processing:  Pixinsight – SPCC, DBE, SPCC, BlurXT, NoiseXT → Linear
  • HTS, GHS, MStr, PixelMath MStr + GHS + HST → Stars,
  • Linear, StarXT, HTS, GHS, MStr → Stars,
  • PixelMath ~(~Starless*~Stars) → Blend
  • Location:  Darling Hill Observatory in Vesper, NY