Reflection Nebula
IC 5076 (VdB 137)
IC 5076, also known as vdB 137, is a reflection nebula located in the constellation Cygnus, about 2° north of the North America Nebula. It is situated at an estimated distance of 1750 parsecs (approximately 5700 light-years) and is part of the same galactic region as the Cygnus X nebular complex. Nearby, the open cluster NGC 6910 can be observed a few arcminutes to the south.
This nebula is associated with the star HD 199478, a blue supergiant of spectral class B8Iae. The star exhibits strong emission lines, characteristic of Be stars, and is classified as a pulsating variable under the designation V2140 Cygni. Its apparent magnitude is 5.73, with brightness variations of about 0.1 magnitude.
To capture this image, a Planewave CDK17 telescope (432mm) was used, paired with a FLI Kepler 4040 CMOS camera and Astronomik Deep-Sky LRGB filters. A total of 45 frames, amounting to 4.2 hours of exposure, were stacked. Post-processing techniques were applied to adjust contrast and levels, bringing out subtle details such as the background nebula.
TECHNICAL DATA
ACQUISITION DETAILS
OPTICS Planewave CDK17 @ F/6.8
CAMERA FLI Kepler 4040fi CMOS
MOUNT Planewave L-500 Fork Mount
FILTERS Ha, R, G, B
LOCATION Apollo 11 Observatory, Badajoz, Extremadura, Spain
DATE April 2024
EXPOSURES 4.2 hours (L 15x 300 sec, R 15 x 300 sec, G 15 x 300 sec, B 15 x 300 sec)
PROCESSING SOFTWARE Pixinsight, Photoshop
COPYRIGHTS Nicolas Rolland & Roboscope

TARGET DETAILS
RA 20h 55m 31.4s
DEC +47° 24' 18.9"
SIZE 41.8 x 41.8 arcmin
PIXEL SCALE 0.493 arcsec/pixel
ORIENTATION Up is 2.1 degrees E of N
CONSTELLATION Cygnus