Basic object information
Object name: PK 47+42.1
Object type: Planetary nebula
Magnitude: 12.9
Size: 2.9'
Magnitude of central star: 15.8
Object classification: 2c

Catalog information
RA (J2000.0): 16h 27m 30.0s
Dec (J2000.0): +27° 54' 00"

Constellation: Hercules

Observer: Iiro Sairanen
Obs. place: Haakanala, Rautjärvi, Finland
Date/time: 19/20.8.2010 0:30
Telescope: Newton 457/2280 mm
Magn: 134x Filter: O-III
Field: 30' NE Lim.mag: 7.0
SQM: 21.5 (2) Seeing: 2
Visuality: V Height: 32°
Weather: +8°C, astronomical twilight  
A very difficult round planetary nebula. Visible with an O-III which shows a thin ring with averted vision. Stars, including central star, have been drawn without filter and higher magnification.