Celestial hemisphere:  Northern  ·  Constellation: Cepheus (Cep)
Getting plate-solving status, please wait...
sh 2-155 Cave Nebula NB, Richard Pattie
sh 2-155 Cave Nebula NB
Powered byPixInsight

sh 2-155 Cave Nebula NB

Getting plate-solving status, please wait...
sh 2-155 Cave Nebula NB, Richard Pattie
sh 2-155 Cave Nebula NB
Powered byPixInsight

sh 2-155 Cave Nebula NB

Equipment

Loading...

Acquisition details

Loading...

Description

This is my first start-to-finish image in 9 months. Between the stressful process of relocating to a new home in southern Arizona and arriving just before the Monsoon season, it's taken this long for the weather and my equipment to get into sync. Having a dark sky overhead (Bortle 3), is incredible. Before I moved from my Bortle 7 southern California location I had never seen the Milky Way. Now I see it nearly every night. Definitely happy I made the move.

"Sh2-155 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. Sh2-155 is an ionized H II region with ongoing star formation activity. It lies at an estimated distance of 2,400 light-years from Earth.

Sh2-155 was first noted as a galactic emission nebula in the 1959 extended second edition of the Sharpless catalogue. 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, 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." [Source: adapted from Wikipedia]

Processed: [L(Ha)=1.00]; [R=.70 Ha, .3 SII]; [G= .15 Ha .85 OIII]; [B=1.00 OIII]

Comments

Revisions

  • Final
    sh 2-155 Cave Nebula NB, Richard Pattie
    Original
    sh 2-155 Cave Nebula NB, Richard Pattie
    B
    sh 2-155 Cave Nebula NB, Richard Pattie
    C

Sky plot

Sky plot

Histogram

sh 2-155 Cave Nebula NB, Richard Pattie