Celestial hemisphere:  Northern  ·  Constellation: Orion (Ori)  ·  Contains:  LBN 862  ·  LBN 863  ·  LBN 864  ·  LDN 1587  ·  Sh2-261
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Sh2-261 Lower's Nebula, Kirby Collins
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Sh2-261 Lower's Nebula

Revision title: RGB + SHO

Getting plate-solving status, please wait...
Sh2-261 Lower's Nebula, Kirby Collins
Powered byPixInsight

Sh2-261 Lower's Nebula

Revision title: RGB + SHO

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Description

In the 1950s an astronomer with the US Naval Observatory named Stewart Sharpless surveyed and published a catalog of Hydrogen-alpha emission regions.  It contains 312 objects, including ones discovered by earlier astronomers and listed in the New General Catalog (NGC), as well as some that hadn't been cataloged before.

This is the first time I've used the Starnet process in Pixinsight to remove the stars from the narrowband images.  It really does make it easier to add in the NB data in PixelMath.

Comments

Revisions

  • Sh2-261 Lower's Nebula, Kirby Collins
    Original
  • Sh2-261 Lower's Nebula, Kirby Collins
    B
  • Sh2-261 Lower's Nebula, Kirby Collins
    C
  • Sh2-261 Lower's Nebula, Kirby Collins
    D
  • Sh2-261 Lower's Nebula, Kirby Collins
    E
  • Final
    Sh2-261 Lower's Nebula, Kirby Collins
    F

B

Title: Ha with stars removed

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C

Title: OIII with stars removed

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D

Title: SII with stars removed

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E

Title: RGB + HOO

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F

Title: RGB + SHO

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Histogram

Sh2-261 Lower's Nebula, Kirby Collins