Iiro's DeepSky Sketches

Name: PK 58+6.1 (Abell 57)Other name: Abell 57
RA: 19h 17.1m DEC: +25° 37'
Constellation: VUL
Type: Planetary nebula
Magnitude: 16.6
Size: 40'' x 34''
Surface brightness: 13.3
Brightest star: 17.6
Classification: 3b
Observer: Iiro Sairanen
Location: Haakanala, Rautjärvi, Finland
Date: 19/20.8.2010 2:00
Instrument: Newton 457/2280 mm
Magnification: 457xFilter: UHC
Field: 9'Seeing: 2
Background sky: 2NE lim mag: 6.8
Visuality: VHeight: 40°
Weather: +7°C, astronomical twilight
Description: A faint arc-like nebula with an UHC and averted vision. The bright stars nearby made observation challenging. Stars have been drawn without the filter.
Updated: 28.9.2010 20:10