Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  Sh2-155  ·  VdB155
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Sh2-155 - vdB155, 


            Gary Imm
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Sh2-155 - vdB155

Getting plate-solving status, please wait...
Sh2-155 - vdB155, 


            Gary Imm
Powered byPixInsight

Sh2-155 - vdB155

Imaging telescopes or lenses: Takahashi TOA-130NFB

Imaging cameras: ZWO ASI 1600MM Cooled Pro

Mounts: Astro-Physics Mach1GTO

Guiding telescopes or lenses: Orion 60mm Guidescope

Guiding cameras: Orion StarShoot AutoGuider Pro Mono

Software: Main Sequence Software Sequence Generator Pro  ·  PixInsight  ·  Stark Labs PHD2 2.6.3

Filters: Astrodon Ha 31mm 5nm  ·  Astrodon Green 31mm Gen2 I-Series  ·  Astrodon Blue 31mm Gen2 I-Series  ·  Astrodon Red 31mm Gen2 I-Series

Accessory: ZWO EFW  ·  Takahashi Flattener TOA-67  ·  Feathertouch Focuser Boss II Electronic Focusing Control

Dates:Oct. 29, 2018Oct. 30, 2018Oct. 31, 2018

Astrodon Blue 31mm Gen2 I-Series: 120x60" (2h) (gain: 139.00) -20C bin 1x1
Astrodon Green 31mm Gen2 I-Series: 120x60" (2h) (gain: 139.00) -20C bin 1x1
Astrodon Ha 31mm 5nm: 24x300" (2h) (gain: 300.00) -20C bin 1x1
Astrodon Red 31mm Gen2 I-Series: 120x60" (2h) (gain: 139.00) -20C bin 1x1

Integration: 8h

Avg. Moon age: 20.86 days

Avg. Moon phase: 63.31%

RA center: 22h55m39s.285

DEC center: +62°2350.34

Pixel scale: 0.782 arcsec/pixel

Orientation: -72.690 degrees

Field radius: 0.582 degrees

More info:Open 

Resolution: 4298x3212

Locations: Backyard (Mag 20.8 - Bortle 4.5), Onalaska, Texas, United States

Data source: Backyard


This image captures a fascinating series of dark, emission and reflection objects in the constellation of Cepheus. The most famous of these is the red hydrogen emission area Sh2-155, towards the lower left corner of the image. Better known as the Cave Nebula, it is located 2400 light years away and has a radius of 35 light-years. The bright rim of ionized hydrogen gas that forms the cave outline is being energized by the radiation from the two bright stars towards the top of the cave. Looking closely, there appears to be a bluish reflection nebula in this same area. Numerous dark lanes, aside from the cave itself, extend throughout the left side of the image. The Cave Nebula object is the 9th object in the Caldwell Catalog.

A number of other interesting reflection nebulae are seen on the right side of the image. vdB 155 is the misty blue nebula towards the upper right corner. Near the center of the right side is an interesting unnamed small nebulae complex which is being illuminated by colorful blue and yellow stars. The complex consists of a red emission nebula, a dim blue reflection nebula and a dim yellow reflection nebula, along with several small dust lanes.

At the lower right corner is a fascinating small unnamed white reflection nebula surrounding a star. It looks to be a star trying to break out of its birth cloud, similar in form to NGC 1999 (the Keyhole Nebula), as well as the Hinds and Hubble Variable nebulae.


Sky plot

Sky plot


Sh2-155 - vdB155, 


            Gary Imm