Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  11 Cep  ·  2 tet Cep  ·  3 eta Cep  ·  4 Cep  ·  5 alf Cep  ·  6 Cep  ·  63 eps Dra  ·  64 e Dra  ·  65 Dra  ·  67 rho Dra  ·  68 Dra  ·  7 Cep  ·  71 Dra  ·  78 Dra  ·  8 bet Cep  ·  AC Dra  ·  Alderamin  ·  Alfirk  ·  B148  ·  B149  ·  B150  ·  B152  ·  NGC 7023  ·  NGC6869  ·  NGC6911  ·  NGC6939  ·  NGC6946  ·  NGC6949  ·  NGC6951  ·  NGC6952  ·  And 22 more.
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a dusty widefield in Cepheus, 



    
        

            tommy_nawratil
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a dusty widefield in Cepheus

Technical card

Imaging telescopes or lenses: Samyang 135mm f/2 ED UMC

Imaging cameras: Canon Eos6da

Mounts: SkyWatcher Star Adventurer

Software: Photoshop  ·  Pleiades Astrophoto, S.L. Pix Insight


Dates:Aug. 8, 2015

Frames: 514x180"

Integration: 25.7 hours

Avg. Moon age: 23.62 days

Avg. Moon phase: 34.63%


Astrometry.net job: 3277571

RA center: 20h 47' 50"

DEC center: +66° 30' 13"

Pixel scale: 15.617 arcsec/pixel

Orientation: -95.173 degrees

Field radius: 9.234 degrees


Resolution: 3540x2379

Locations: my lovely garden, near Vienna, Austria

Data source: Traveller

Description

On some nights between August and November 2015 I trained my Eos6d with Samyangs wonderful 135mm at f/2 towards Cepheus. A lot of objects are contained, prominent Iris nebula, Ghost nebula under it, reflection nebula vdB143 on bottom, to the right the flying bat Sh2-129 (no trace of Outters 4 here), above it dark Barnard 150 the seahorse nebula, and right almost top the pair: open cluster NG6939 and firewheel galaxy NGC6946. A little above center you may detect 10,6mag galaxy NGC6951. While there is no catalog number available for the object as a whole, the field is strongly dominated by a complex of dust clouds, which extend far beyond the picture frame.

Note the little ring artefact around Mira star T Cephei, a little under the Iris, it stands out even on the single raw pics, and can be seen only around this star. I know from another photographer, that he also got it on his photos with a different optical train, so while it is surely an artefact of imaging, it must also be connected somehow to the properties of this special star.

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a dusty widefield in Cepheus, 



    
        

            tommy_nawratil