14 July 2021

NGC 7023(Iris Nebula) in LRGB

 

The Iris Nebula (also known as NGC 7023 and Caldwell 4) is a bright reflection nebula in the constellation Cepheus. The designation NGC 7023 refers to the open cluster within the larger reflection nebula designated LBN 487.

The nebula, which shines at magnitude +6.8, is illuminated by a magnitude +7.4 star designated SAO 19158. It is located near the Mira-type variable star T Cephei, and near the bright magnitude +3.23 variable star Beta Cephei (Alfirk). It lies 1,300 light-years away and is six light-years across. 

Telescope : TS 65 QApo
Mount : Skywatcher AZ-EQ5 GT
Camera : Atik 460 mono
Guiding : Omegon Off-axis guider with Qhy 5IIL
Filters :L,R,G,B total exposure 8 hours & 30 minutes
Programs I have used : PixInsight 1.8.8
Location: Grammatiko, Attiki

 

02 July 2021

Tarantula Nebula SHO

 

The Tarantula Nebula was observed by Nicolas-Louis de Lacaille during an expedition to the Cape of Good Hope between 1751 and 1753. He catalogued it as the second of the "Nebulae of the First Class", "Nebulosities not accompanied by any star visible in the telescope of two feet". It was described as a diffuse nebula 20' across.Johann Bode included the Tarantula in his 1801 Uranographia star atlas and listed it in the accompanying Allgemeine Beschreibung und Nachweisung der Gestirne catalogue as number 30 in the constellation "Xiphias or Dorado". Instead of being given a stellar magnitude, it was noted to be nebulous.The name Tarantula Nebula arose the mid 20th century from the appearance in deep photographic exposures.30 Doradus has often been treated as the designation of a star, or of the central star cluster NGC 2070, but is now generally treated as referring to the whole nebula area of the Tarantula Nebula.

Telescope : ASA 500N (19.6 inches) f\3.8
Mount : ASA DDM85 equatorial mount with direct drives
Camera :  FLI PL 16803
Time:3h 10min (28 Apr 2021)
Programs I have used : PixInsight 1.8.8 & Photoshop CS6
Location: El Sause,Chile