Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)
DG 181,DG 182 : Tiny forgotten reflection nebulas (Cepheus), 


            Antonio F. Sánchez
DG 181,DG 182 : Tiny forgotten reflection nebulas (Cepheus)
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Technical card

Imaging telescopes or lenses: ASA N12 astrograph

Imaging cameras: FLI ML8300

Mounts: ASA DDM85 S-XL

Software: ASA Autoslew, Sequence...

Filters: Optec 50mm B  ·  Optec 50mm G  ·  Optec 50mm R  ·  Optec 50mm L

Accessory: FLI CFW-2-7 50mm round 7 position filter wheel

Dates:Sept. 26, 2014Sept. 29, 2014Oct. 2, 2014Oct. 17, 2014

Optec 50mm B: 33x600" -25C bin 1x1
Optec 50mm G: 30x600" -25C bin 1x1
Optec 50mm L: 75x600" -25C bin 1x1
Optec 50mm R: 31x600" -25C bin 1x1

Integration: 28.2 hours

Avg. Moon age: 9.72 days

Avg. Moon phase: 30.67%

Bortle Dark-Sky Scale: 2.00

Basic astrometry details

Astrometry.net job: 397505

RA center: 22h 16' 36"

DEC center: +60° 49' 8"

Pixel scale: 1.415 arcsec/pixel

Orientation: 0.152 degrees

Field radius: 0.589 degrees

Resolution: 620x464


DG 181, DG 182 (Dorschner+Gurtler catalogue) are two tiny blue reflection nebulas located between the LDN´s 1175 and 1184, into the cloud TGU640 of Cepheus constellation..Rarely imaged (or never imaged ? ) the area also contains IR objects such as IRAS 22148+6033,IRAS 22151+6040,IRAS 22158+6041 ans X-Ray objects as 1RXS J221635.3+604813 .
The whole area is inmersed into a mix of dust and reflections , making it a difficult task for astrophotographers. A lot of hours were invested in order to present it with some detail and colour.
Many thanks to Sakib Rasool for pointing these targets.


Sky plot

Sky plot


DG 181,DG 182 : Tiny forgotten reflection nebulas (Cepheus), 


            Antonio F. Sánchez