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Contains:  IC 1311
Getting plate-solving status, please wait...

IC 1311: so much more than just an OC

Technical card

Resolution: 3283x2398

Dates:May 31, 2019June 2, 2019

45x120" ISO800
Baader Ha 7nm 36mm: 13x600" (gain: 139.00) -15C bin 1x1

Integration: 3.7 hours

Darks: ~30

Flats: ~30

Bias: ~153

Avg. Moon age: 27.57 days

Avg. Moon phase: 5.33% job: 2730433

RA center: 302.683 degrees

DEC center: 41.224 degrees

Pixel scale: 1.382 arcsec/pixel

Orientation: 5.853 degrees

Field radius: 0.780 degrees

Locations: Mobile Setup, Wien, Austria

Data source: Traveller


A fascinating area in Cygnus, as it contains some very interesting objects (for object identification please have a look at the annotated vsersion):

IC 1311, a dense open cluster embedded in an area of abundant emission nebulosity, was discovered by Thomas Espin in 1893. It fits nicely in this FOV. The brightest part of this nebula is listed in Lynd's Bright Nebulae as number 239 (DWB 55) and is part of the much larger IC 1318A nebula.

Patchick 6 (DSH J2009.6+4114): Probable Planetary Nebula, discovered by amateur astronomer Dana Patchick on POSS plates. As far as I could find out, this object is not listed in any catalogue to date.

DO 2: In 1966, Russian astronomer Madona V. Dolidze at the Abastumani Astrophysical Observatory located in Georgia, created a catalog of 57 small open star clusters. Dolidze 2 is not a true physical cluster, so it is rather an asterism.

Circular structure around TYC 3155-1523-1 (HD 191944, SAO 49274): This was suspected to be an old PN, but it turned out that it is very unlikely a PN.

Barnard 342 (LDN 885) is just one of many dark clouds in this area, some bright nebulae are listed in the DWB catalogue.

Short nights, a busy time in the job, accummulated lack of sleep and the fact, that I am running out of time led to little integration time, so I had to stretch and denoise this picture more aggressively than I would have liked. While from a technical point of view this is not my best picture, I still feel that it might be acceptable as it features some nice objects. HA was done with the ASI 1600, RGB with the Canon. The picture was resized to 80 % to hide the worst flaws ;-)

Most probably this is going to be my last image for a while, as once more I am about to spent the next months on a sailing boat. I am looking forward to be back on AB when returning home in autumn. If you reach that point of this long description, I'd like to thank you for your patience. Have a great summer!







Sky plot

Sky plot


IC 1311: so much more than just an OC,