|Observation data: J2000.0 epoch|
|Right ascension||05h 46.7m|
|Apparent magnitude (V)||8.3|
|Apparent dimensions (V)||8′ × 6′|
|Notable features||Part of the Orion Complex|
|Designations||NGC 2068, Ced55u|
The nebula Messier 78 (also known as M 78 or NGC 2068) 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 and HD 38563B, are responsible for making the cloud of dust in M78 visible by reflecting their light.
- Messier 78 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- Messier 78, SEDS Messier pages
- M78: Stardust and Starlight
- NightSkyInfo.com – M78
Astronomy Picture of the Day
- M78 Wide Field 2009 November 26
- M78 and Reflecting Dust Clouds in Orion 2010 March 2
- Haese, Paul. "M78 – Reflection Nebula". Deep Space Videos.