Hemisphere:  Northern  ·  Constellation: Taurus (Tau)  ·  Contains:  Crab nebula  ·  M 1  ·  M1  ·  NGC 1952  ·  Sh2-244
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The Crab Nebula (Messier 1), 



    
        

            Luca Marinelli
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The Crab Nebula (Messier 1)

Getting plate-solving status, please wait...
The Crab Nebula (Messier 1), 



    
        

            Luca Marinelli
Powered byPixInsight

The Crab Nebula (Messier 1)

Imaging telescopes or lenses: Teleskop Service ONTC 10" f4 Newton

Imaging cameras: ZWO ASI 183MM Pro

Mounts: Astro-Physics Mach-1 GTO CP4

Guiding telescopes or lenses: Teleskop Service ONTC 10" f4 Newton

Guiding cameras: Starlight Xpress Ultrastar Mono

Software: Starnet ++  ·  Astro-Physics Command Center (APCC) Pro Software  ·  Photoshop CC  ·  PIXINSIGHT 1.8  ·  Seqence Generator Pro  ·  PHD2 Guiding PHD2 v2.6.5

Filters: Astrodon Narrowband 3nm SII  ·  Astrodon Narrowband 3nm Ha  ·  Astrodon Tru-Balance Gen2 E-Series - B 36mm  ·  Astrodon Tru-Balance Gen2 E-Series - G 36mm  ·  Astrodon Tru-Balance Gen2 E-Series - R 36mm  ·  Astrodon Narrowband 3nm OIII

Accessory: QHYCCD OAG-M  ·  Tele Vue Paracorr Type 2  ·  Pegasus Astro Ultimate Power Box  ·  QHYCCD QHYCFW3-M


Dates:Dec. 7, 2019Dec. 21, 2019Dec. 23, 2019Dec. 25, 2019Jan. 20, 2020Jan. 22, 2020

Frames:
Astrodon Tru-Balance Gen2 E-Series - B 36mm: 75x30" (gain: 54.00) -20C bin 1x1
Astrodon Tru-Balance Gen2 E-Series - G 36mm: 80x30" (gain: 54.00) -20C bin 1x1
Astrodon Tru-Balance Gen2 E-Series - R 36mm: 60x30" (gain: 54.00) -20C bin 1x1
Astrodon Narrowband 3nm Ha: 94x360" (gain: 120.00) -20C bin 1x1
Astrodon Narrowband 3nm OIII: 97x360" (gain: 120.00) -20C bin 1x1
Astrodon Narrowband 3nm SII: 90x360" (gain: 120.00) -20C bin 1x1

Integration: 29.9 hours

Darks: ~50

Flats: ~20

Flat darks: ~50

Bias: ~100

Avg. Moon age: 23.80 days

Avg. Moon phase: 23.07%

Bortle Dark-Sky Scale: 5.00


Astrometry.net job: 3215839

RA center: 5h 34' 32"

DEC center: +22° 0' 49"

Pixel scale: 0.432 arcsec/pixel

Orientation: -179.613 degrees

Field radius: 0.163 degrees


Resolution: 2058x1777

Locations: Home Observatory, Schenectady, New York, United States

Data source: Backyard

Description

There are eight human recorded supernovae in the Milky Way. SN 1054 was first observed on July 4, 1054 by Chinese astronomers and remained visible to the naked eye for two years. It was also described in the Japanese and Arab literature as well as, possibly, in Ancestral Puebloan pictographs in New Mexico.

The remnant of SN 1054, which consists of debris and hot gases released during the explosion of the star is knows as the Crab Nebula in the constellation Taurus and was first observed by English astronomer John Bevis in 1731. In 1928, Edwin Hubble was the first to note that the changing aspect of the Crab Nebula, which was growing bigger in size, suggests that it is the remains of a stellar explosion. Hubble's conjecture remained controversial as the physical phenomenon of the explosion was not known at the time. In 1939, Nicholas Mayall proposed that the star of 1054 was actually a supernova, based on the speed of expansion of the cloud, measured by spectroscopy, which allows astronomers to determine its physical size and distance.

The nebula lies in the Perseus Arm of the Milky Way galaxy, at a distance of about 6,500 light years from Earth. It has a diameter of 11 light years, corresponding to an apparent diameter of some 7 arcminutes, and is expanding at a rate of about 1,500 kilometres per second.

At the center of the nebula lies the Crab Pulsar, a neutron star 28–30 kilometres across with a spin rate of 30.2 times per second, 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 image presented here is the result of over 42 hours of imaging data, culled to include only ~30 hours of the sharpest subexposures. The color palette used is the Hubble palette (SII=Red, Ha=Green, OIII=Blue) with no modification. The hues in the color wheel represent mixture of the three ionized chemical species in the lobes and tendrils of the nebula.

Comments

Revisions

  • Final
    The Crab Nebula (Messier 1), 



    
        

            Luca Marinelli
    Original
    The Crab Nebula (Messier 1), 



    
        

            Luca Marinelli
    B
    The Crab Nebula (Messier 1), 



    
        

            Luca Marinelli
    C

B

Description: Uncropped field of view.

Uploaded: ...

C

Description: Animated GIF displaying relative intensity and spatial distribution of the three narrowband channels.

Uploaded: ...

Sky plot

Sky plot

Histogram

The Crab Nebula (Messier 1), 



    
        

            Luca Marinelli