Basic object information
Name: M 51
Type of object: Galaxy
Magnitude: 8.4
Surface brightness: 12.5 mag/sq arcmin
Size: 9.0'x7.5'
Position angle: 163
Object classification: Sc
Description: !!!,Great spiral nebula
Notes: PA 163,Whirlpool Gal,interacting pair P(b) at 4',classic spiral

Catalog position for epoch J2000.0
Right ascension: 13h 29m 53.3s
Declination: +47 11' 48"

Constellation: Canes Venatici

Observer: Iiro Sairanen
Obs. place: Base del Teide (2280m above sea level), Tenerife, Spain
Date/Time: 19/20.4.2004 23:50

Telescope: Newton 110/805mm

Magn: 94x


Field: 28'

NE Lim.mag: 7,0

Background sky: 2

Seeing: 2

Height: 69
Visuality: II

Weather: +11˚C, thin highclouds

Clear hints of spiral arms were visible with averted vision in M51. NGC 5195 is almost round but slightly irregular.