Daily Archives: December 19, 2014

Orion Nebula, M42


The Orion Nebula (also known as Messier 42, M42, or NGC 1976) is a diffuse nebula situated in the Milky Way south of Orion’s Belt in the constellation of Orion. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of 1,344 ± 20 light years and is the closest region of massive star formation to Earth. The M42 nebula is estimated to be 24 light years across. It has a mass of about 2000 times the mass of the Sun. Older texts frequently refer to the Orion Nebula as the Great Nebula in Orion or the Great Orion Nebula.

The Orion Nebula is one of the most scrutinized and photographed objects in the night sky, and is among the most intensely studied celestial features. The nebula has revealed much about the process of how stars and planetary systems are formed from collapsing clouds of gas and dust. Astronomers have directly observed protoplanetary disks, brown dwarfs, intense and turbulent motions of the gas, and the photo-ionizing effects of massive nearby stars in the nebula.

Imaging telescopes or lenses: Sky-Watcher Black Diamond 200/1000 F5
Imaging cameras: Canon EOS 500D / Baader Mod, Canon EOS 450D Baader modified and cooled with cold finger
Mounts: Sky-Watcher N-EQ6 SkyScan EVO 1
Guiding telescopes or lenses: SkyWatcher 80/400, SkyWatcher Refractor 70/500
Guiding cameras: Astrolumina QHY5L-II Color
Software: Canon EOS Utility, FocusMax, APT – Astro Photography Tool, Pleaides Astrophoto Pixinsight 1.8, Canon Digital Photo Professional, DitherMaster for Canon EOS Utility
Filters: Astronomik CLS EOS Clip-Filter , Astronomik CLS 2″
Accessories: Baader Planetarium Mark II MPCC Coma Corrector, Omegon Dual speed crayford focuser for newtonian, Home made Arduino Focuser (project ser Jolo – ascom-jolo-focuser), Bahtinov mask 8″, EQMOD USB cable
Resolution: 3378×2556
Dates: Nov. 3, 2013, Dec. 13, 2014
Astronomik CLS 2″: 40×10″ ISO1600 -21C
Astronomik CLS EOS Clip-Filter : 75×15″ ISO3200
Integration: 0.4 hours
Avg. Moon age: 24.87 days
Avg. Moon phase: 32.35%
Temperature: 9.00
RA center: 83.764 degrees
DEC center: -5.525 degrees
Orientation: 66.628 degrees
Field radius: 0.625 degrees
Locations: Balcone di casa, Monreale, Palermo, Italy

Author:  Alessandro Pensato