w1800 20190827 M27 A7Ra ISO3200 18x30s

The Dumbbell Nebula (also known as Apple Core Nebula, Messier 27, M 27, or NGC 6853) is a planetary nebula in the constellation Vulpecula, at a distance of about 1360 light-years. This object was the first planetary nebula to be discovered; by Charles Messier in 1764. At its brightness of visual magnitude 7.5 and its diameter of about 8 arcminutes, it is easily visible in binoculars, and a popular observing target in amateur telescopes.

Central star
The central star (brightly visible on my photo), a white dwarf progenitor, is estimated to have a radius which is 0.055±0.02 R (0.13 light seconds) which gives it a size larger than most other known white dwarfs. The central star mass was estimated in 1999 by Napiwotzki to be 0.56±0.01 M.

 

ObjectM27 or NGC 6853 - Dumbbell Nebula
Constellation:  Vulpecula
Position: RA 19h 59m 36.340s DEC +22° 43′ 16.09″
Apparent Size: 8.0 × 5.6 arcmin
Apparent Magnitude/surface brightness: +7.5 / +11.2
Distance (average) 1360 ly
  
Photo Datas 
Date 27.08.2019, 21:48 UTC
Location Knottenried/Oberallgäu, 1002m ASL
GPS: 47°36’13“ N, 10°11’24“ E
Sky darkness SQM-L Zenit 21.23mag/sqrsec, Object 21.24mag/sqrsec
Ground Temp./Air Pressure 18.0°C /1016mbar
Thermal sky temp./weather  -29.1°C Zenit / high altitude haze
Seeing  4/10
Telescope TS RC 14" 2845mm f/8.0
Camera Sony A7Ra mod @ T sensor=21.3°C !!
Expose frames ISO 3200, RAW 18x30s, 16 darks
Total expose
9 min.
Filter no
Mount HPS 10Micron GM 3000
Guiding Cam no
Software DSS 3.3.4, Photoshop CC
Remarks  

C 2019 Peter Cerveny