Reflection Nebula
IC 5076 (VdB 137)

Processed by Nicolas Rolland, Paris. 6.9 hours gathered by Roboscope at Apollo 11 Observatory, Fregenal de la Sierra, Spain.
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 6.9 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