Getting plate-solving status, please wait...


            Joshua Judkins


Getting plate-solving status, please wait...


            Joshua Judkins



Imaging Telescopes Or Lenses
Meade 12" LX600-ACF
Imaging Cameras
Meade Giant Field Tripod
ZWO Ha 7nm 1.25" · ZWO 1.25" Luminance
Meade X-Wedge
Stark Labs Nebulosity 4.0 · Adobe PHOTOSHOP CS6
Guiding Telescopes Or Lenses
MEADE Starlock

Acquisition details

Dec. 30, 2018
ZWO Ha 7nm 1.25": 8x240" (32') (gain: 120.00) -10C bin 1x1
ZWO Lum 1.25": 7x240" (28') (gain: 120.00) -10C bin 1x1
Avg. Moon age:
23.27 days
Avg. Moon phase:
Bortle Dark-Sky Scale:

Basic astrometry details job: 2491947

Resolution: 4115x3123

Data source: Backyard


My first time imaging this object. Was going to do a complete color composition with LHaOIISII data but after Ha camera rotated and with no flats I decided to just see what the resultant image looked like. I used mostly the Ha data and added in some Luminance in separate ~65% opaque layer. For a first try, i think it turned out alright!

From wiki:

The Crab Nebula (catalogue designations M1, NGC 1952, Taurus A) is a supernova remnant in the constellation of Taurus. The now-current name is due to William Parsons, who observed the object in 1840 using a 36-inch telescope and produced a drawing that looked somewhat like a crab.[5] Corresponding to a bright supernova recorded by Chinese astronomers in 1054, the nebula was observed later by English astronomer John Bevis in 1731. The nebula was the first astronomical object identified with a historical supernova explosion.

At an apparent magnitude of 8.4, comparable to that of Saturn's moon Titan, it is not visible to the naked eye but can be made out using binoculars under favourable conditions. The nebula lies in the Perseus Arm of the Milky Way galaxy, at a distance of about 2.0 kiloparsecs (6,500 ly) from Earth. It has a diameter of 3.4 parsecs (11 ly), corresponding to an apparent diameter of some 7 arcminutes, and is expanding at a rate of about 1,500 kilometres per second (930 mi/s), or 0.5% of the speed of light.

At the center of the nebula lies the Crab Pulsar, a neutron star 28–30 kilometres (17–19 mi) across with a spin rate of 30.2 times per second,[6] which emits pulses of radiation from gamma rays to radio waves. At X-ray and gamma ray energies above 30 keV, the Crab Nebula is generally the brightest persistent source in the sky, with measured flux extending to above 10 TeV. The nebula's radiation allows for the detailed studying of celestial bodies that occult it. In the 1950s and 1960s, the Sun's corona was mapped from observations of the Crab Nebula's radio waves passing through it, and in 2003, the thickness of the atmosphere of Saturn's moon Titan was measured as it blocked out X-rays from the nebula.

The inner part of the nebula is a much smaller pulsar wind nebula that appears as a shell surrounding the pulsar. Some sources consider the Crab Nebula to be an example of both a pulsar wind nebula as well as a supernova remnant,[7] while others separate the two phenomena based on the different sources of energy production and behaviour.[4]



  • M1, 


            Joshua Judkins
  • Final


            Joshua Judkins




            Joshua Judkins