15 Δεκεμβρίου 2022

LBN 529 Cave Nebula LRGB/Ha

 
New Version 2023

 Telescope : SW Esprit 100ED
Mount : Skywatcher AZ-EQ5 GT
Camera : Atik 460 mono
Guiding : offaxis guider with QHY 5IIL
Filters :Baader LRGB Total exposure time : 9 hours and  5 minutes from 2 different nights .
Programs I have used : Nina 1.10 _ PixInsight 1.8.9_ Photoshop CS6
Location: Grammatiko, Attiki

Sh2-155 (also designated Caldwell 9, Sharpless 155 or S155) is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity. It is widely known as the Cave Nebula, though that name was applied earlier to Ced 201, a different nebula in Cepheus. Sh2-155 is an ionized H II region with ongoing star formation activity, at an estimated distance of 725 parsecs (2400 light-years) from Earth.

Sh2-155 was first noted as a galactic emission nebula in 1959 in the extended second edition of the Sharpless catalogue, being a part of the much larger Cep OB3 Association. Although Sh2-155 is relatively faint for amateur observation, some of its structure may be seen visually through a moderately sized telescope under dark skies.

Sh2-155 lies at the edge of the Cepheus B cloud (part of the Cepheus molecular cloud), and is ionized by young stars from the Cep OB3 association It has been suggested that radiation from the hot O-type star HD 217086 is compressing the region, triggering the formation of a new generation of stars. A study of the region's young stellar objects by the Chandra X-ray Observatory and Spitzer Space Telescope shows a progression of stellar ages in front of the cloud, supporting the hypothesis of triggered star-formation.

12 Απριλίου 2022

Leo Triplet (M 66 group) in Lrgb

 
New edition with much more careful processing 2024

  The Leo Triplet (also known as the M66 Group) is a small group of galaxies about 35 million light-years away in the constellation Leo. This galaxy group consists of the spiral galaxies M65, M66, and NGC 3628

The M96 Group is located physically near the Leo Triplet. These two groups may actually be separate parts of a much larger group, and some group identification algorithms actually identify the Leo Triplet as part of the M96 Group.

Telescope : SW Esprit 100ED
Mount : Skywatcher AZ-EQ5 GT
Camera : Atik 460 mono
Guiding : SW Evoguide 50mmED with QHY 5IIL
Filters :Baader LRGB Total exposure time : 10:30 minutes from 3 different nights
Programs I have used : Nina 1.10 _ PixInsight 1.8.8_ Photoshop CS6
Location: Grammatiko, Attiki

 

07 Ιανουαρίου 2022

IC 410 The Tadpoles -SHO

 
New edition with more live process 2024

Old edition




Telescope : SW Esprit 100ED
Mount : Skywatcher AZ-EQ5 GT
Camera : Atik 460 mono
Guiding :ZWO off-axis guider with QHY 5IIL
Filters :Astrodon Ha(5nm) 21x600, Baader O3 13x600, SII 9x600.Total : 7hours and 10min
Programs I have used : Nina 1.11 _ PixInsight 1.8.9
Location: Grammatiko, Attiki

The Tadpole Nebula (IC 410) is an H II region located approximately 12,400 light-years away in the northern constellation Auriga. It is associated with the young open cluster NGC 1893. The cluster has an apparent magnitude of 7.5 and an apparent size of 11 arcminutes. It is an easy target for small telescopes.

The dusty emission nebula IC 410 is ionized by five hot, blue, O-type stars, HD 242935 (O7.5V), BD +33 1025 (O7V), HD 242908 (O4.5V), HD 242926 (O7Vz), and TYC 2394-1214-1. These massive stars are believed to be the main sources of ionization in the region. They emit high-energy ultraviolet protons that excite the nebula and make it glow.

The nebula is more than 100 light-years across. It is part of a larger star-forming region that is also home to the nearby Flaming Star Nebula (IC 405).