Vela – SNR

Vela – SNR

Supernova Remnant

Constellation: Vela
Ra: 08h 34m 29s
Dec: -43d 40m 35s
Distance: 800-1000 light years
Image Size: 2.8 x 2.8 degrees
North: Up, East Left



The Vela Supernova Remnant (SNR) is large structure encompassing 8 degrees in the southern constellation of Vela (The Sails) about 800 light years distant with a visual magnitude of about 12.  It is believed to result from a powerful explosion of a star some 11,000 -12,000 years ago.  The shock waves shown in the image as blue-green from oxygen emission and red/magenta from hydrogen emission have been expanding ever since.   The Vela pulsar (PSR B0833-45) associated with this SNR is a neutron star that was formed when a massive star collapsed. It is 12 miles in diameter and rotates over 11 times per second. It is just off the bottom of the image.  The Pencil Nebula (NGC 2736 – see my image  here) is off to the lower left about 5 degrees away from the center of this image (at least one full image frame) and is still part of the Vela SNR, to provide some perspective of size.

This image represents a 2.8 x 2.8 degree field. North is up and East is toward the left.  The Vela SNR is likely embedded in an older and much larger SNR, referred to as the Gum Nebula, that occurred over a million years ago.

The enhanced structure in this image is a result of 17.5 hours of data from OIII and H-alpha narrowband filters with 3 nm bandpasses.  They were mapped to provide “natural” color, with H-a mapped to red/magenta and OIII mapped to blue-green.  2 hours of RGB data based upon a G2V star white point were included for “natural” star colors.

Exposure: 19.5 hrs Total; 10 hrs H-a, 7.5 OIII, 2 RGB
Telescope: Takahashi TOA130 764 mm f/5.8
Mount: PlaneWave Ascension 200h
Oag: No OAG, mini-BORG 250
Acquisition: CCDAutoPilot5
Calibration: CCDStack2
Observatory Site: Siding Spring,, NSW, Australia
Camera: Apogee U16M
Filters: Astrodon 3 nm OIII, 3 nm H-a, Gen 2 RGB
Guider: SBIG ST-402
Camera Operation: Maxim 5.24
Processing: Photoshop CC, PixInsight 1.8
Image Date: 11/26/2014 - 12/18/2014

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