• Messier 1 in Taurus, the Crab Nebula
    • M1 in Taurus, Crab Nebula
    Annotated image
  • Messier 1, M1 or the Crab Nebula, is a supernova remnant
  • of a star that exploded in 1054, as seen from Earth.
  • M1 is being shaped by the winds from a pulsar, has
  • a radius of ~5.5 ly, and is 6.5 kly from us.
  • Hover over the image for an annotated view.
  • Date:  15 September 2025
  • FOV:  cropped to 15' × 10'
  • M1 is about 7' long
  • Rotation:  0.001°
  • Telescope:  Celestron C14 SCT (3910mm, f/11)
  • Starizona SCT Coma Corrector/Reducer (2668.5mm, f/7.5)
  • 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:  0.293 arcsec/pixel
  • Filter:  Optolong UV/IR
  • Stacking:  thirty-eight 300 second frames using PixInsight
  • Calibration frames: 20 dark, 20 flat, 20 dark flat
  • Total Time:  3 hours 10 minutes
  • Processing:  Pixinsight – SPCC, DBE, SPCC, BlurXT, NoiseXT → Linear
  • HTS, GHS, MStr, PixelMath MStr + GHS + HST → Stars,
  • Linear, StarXT, HTS, GHS, MStr,
  • PixelMath MStr + GHS + HST → Starless
  • HDRMST_6_PhLm,
  • PixelMath ~(~Starless*~Stars) → Blend
  • Location:  Darling Hill Observatory in Vesper, NY