Celestial hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  42 c Ori  ·  45 Ori  ·  NGC 1973  ·  NGC 1975  ·  NGC 1977  ·  Sh2-279  ·  The star 42Ori  ·  The star 45Ori
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NGC 1977 (SH2-279, NGC 1973, NGC 1975), Alex Woronow
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NGC 1977 (SH2-279, NGC 1973, NGC 1975)

Getting plate-solving status, please wait...
NGC 1977 (SH2-279, NGC 1973, NGC 1975), Alex Woronow
Powered byPixInsight

NGC 1977 (SH2-279, NGC 1973, NGC 1975)

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Description

NGC 1977 (SH2-279, NGC 1973, NGC 1975)

OTA: RCOS (14.5” f/8)

Camera: SBIG STX-16803

Observatory: Deep Sky West

EXPOSURES:

Red: 25 x 900 sec

Blue: 15 x 900

Green: 15 x 900

Lum.: 20 x 900

Hydrogen: 10 x 1800

Total exposure ~24 hours

Image Width: ~0.5 deg

Processed by Alex Woronow using PixInsight, Affinity Photo (2019)

SH2-279 is an HII emission nebula (red) that also contains reflection nebulae (blue). This object is at the northern-most extent of “Orion’s Sword” and the entire sword region, with is extensive array of nebulae, has be cataloged as Orion 1c. The source of ionization of the hydrogen is the young stellar object (YSO) 42 Orionis, which is the the topmost, and brightest of the three stars near the image center. The prominent and famous M42 nebula lies to the upper right in the image, and some of its distal extent is captured in this picture.

The processing involved developing the techniques for applying "Laplacian of Gaussian" sharpening (see Gonzales & Wood, “Digital Image Processing” ) to an astro-image. The stars pose a substantial problem to such sharpening. The results here are not perfect, but after several hundred hrs of trial-and error, the results show promise--but issues remain!

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Revisions

  • NGC 1977 (SH2-279, NGC 1973, NGC 1975), Alex Woronow
    Original
  • Final
    NGC 1977 (SH2-279, NGC 1973, NGC 1975), Alex Woronow
    B

B

Description: Improved stars--better use of Affinity Photo vs LoG

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NGC 1977 (SH2-279, NGC 1973, NGC 1975), Alex Woronow

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Narrowband imaging