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Georges CHASSAIGNE
Melotte 15
AAPOD2 du 06-06-2017
"Coup de Coeur" du concours STELVISION n°22 (décembre 2017)
Le coeur de Ic 1805 dans la constellation de Cassiopée
Matériels:
Télescope Astrosib 360mm 14"
Monture Astrophysics AP1600 AE (encodeurs absolus)
Caméra SBIG STX+AOX poses de 15mn à -30°C
The Skyx pro+ Pixinsight+ Photoshop
Filtres Ha=3nm + SII=3nm +OIII=3nm
Prise de vue:Ha=9h16h45 + SII=7h + OIII=4h45 soit 28h30mn
Date de prise de vue: du 19/11 au 27/12/2016
Lieu: Fregenal de la sierra (Espagne) en remote
Full image:
Présentation(source Wikipédia)
IC 1805, surnommée la nébuleuse du Cœur, est une nébuleuse en émission située à environ 6 500 année-lumière dans la constellation de Cassiopée. Elle couvre un champ d'environ 60 minutes d'arc, ce qui correspond approximativement à 200 années-lumière1.
Cette nébuleuse contient un amas ouvert, Melotte 15
The Heart Nebula, IC 1805, Sharpless 2-190, lies some 7500 light years away from Earth and is located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. This is an emission nebula showing glowing ionized hydrogen gas and darker dust lanes.
The very brightest part of this nebula (the knot at the western edge) is separately classified as NGC 896, because it was the first part of this nebula to be discovered.
The nebula's intense red output and its configuration are driven by the radiation emanating from a small group of stars near the nebula's center. This open cluster of stars known as Melotte 15 contains a few bright stars nearly 50 times the mass of our Sun, and many more dim stars that are only a fraction of our Sun's mass.
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