M78, Nebula Messier 78


The nebula Messier 78 is a reflection nebula in the constellation Orion. It was discovered by Pierre Méchain in 1780 and included by Charles Messier in his catalog of comet-like objects that same year.

M78 is the brightest diffuse reflection nebula of a group of nebulae that include NGC 2064, NGC 2067 and NGC 2071. This group belongs to the Orion Molecular Cloud Complex and is about 1,600 light years distant from Earth. M78 is easily found in small telescopes as a hazy patch and involves two stars of 10th magnitude. These two stars, HD 38563A andHD 38563B, are responsible for making the cloud of dust in M78 visible by reflecting their light.

Imaging telescopes or lenses: Takahashi TOA-150
Imaging cameras: QHYCCD QHY 11
Filters: Baader LRGB Ha SII OIII 2″
Resolution: 1411×1000
Dates: Dec. 21, 2014
Frames: 28×900″
Integration: 7.0 hours
Avg. Moon age: 28.38 days
Avg. Moon phase: 1.50%
RA center: 86.707 degrees
DEC center: 0.135 degrees
Pixel scale: 3.309 arcsec/pixel
Orientation: 148.685 degrees
Field radius: 0.795 degrees
Locations: Ruoyan Observatory, Urumqi, Xinjiang, China
Author: Steve Yan