Hemisphere:  Northern
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.



Antonio F. Sánchez
License: None (All rights reserved)

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


            Antonio F. Sánchez