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LBN 168 - Tulip Nebula (Sh 2-101, Ced 173) in Sygnus

RHa-GSII-BOIII combination (Click for a larger view 1400 x 1400 px)

 

Ha - narrowband (Click for a larger view 1400 x 1400 px)

Details

LBN 168 - Tulip Nebula (Sh 2-101, Ced 173) in Sygnus

LBN 168 (Sh2-101) - This impressive and bright emission nebula in Cygnus, more commonly known as the Tulip Nebula, lies very close to η-Cyg (mag 3.89) and spans 8.8 light-years in diameter. It is lying at a distance of about 8000 light-years away. This glowing cloud of interstellar gas and dust is also found in the 1959 catalog by astronomer Stewart Sharpless as Sh2-101. Ultraviolet radiation from young, energetic O star HDE 227018 ionizes the atoms and powers the emission from the Tulip Nebula. What is of great interest is the fact that the well-known black hole candidate Cygnus X-1 lies very close to the Tulip Nebula.

North is up. The Horizontal FOV is about 38' . The image almost centered at:

Right Ascension 19 : 59.9 (h:m)
Declination +35 : 17.5 (deg:m)
Distance 8 (kly)
Brightness 9 (mag)
Apparent Dimension

25 x 15 (arc min)

Seeing: Pickering 7 rating - Good
Optic(s): RC 12" with Astro-Physics corrector @ f/5.4
Mount: ASA DDM85 Premium
Camera: ATIK 4000 - monochrome CCD – 2048 x 2048 px ; 16x16 mm; 7.4 µm x 7.4 µm
Filters: Astronomik Ha, OIII, SII, and R, G, B set, SupaSlim TrueTechnology Computerized Filter Wheel
Dates/Times: 2012-07-16
Location: Rozhen Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exposure Details:

Ha = 80 min, OIII = 40 min, SII = 40 min, subs. 10 min, Bin1, Total Exposure Time narrowband- 160 min

R = 15 min, G = 15 min, B = 15 min, subs. 5 min, Bin 1, Total Exposure Time - 45 min

More details: Dark and flat frames reduction
Guiding: All subexposures are unguided
Processing:

PixInsight / PS

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