Basic object information

Object name: M 51, NGC 5195 & IC 4278
Popular name: Whirlpool
Galaxy Object type: Galaxies
Magnitude: 8.1, 9.6 & 15.4
Size: 11.2'x6.9', 5'x4' & 30"x18"

Catalog information

RA (J2000.0): 13h 29m 54.0s
Dec (J2000.0): +47 12' 00"

Constellation: Canes Venatici

Observer: Iiro Sairanen
Obs. place: Härskiänsaari, Ruokolahti, Finland
Date/Time: 29/30.3.2005 22:45-23.45

Telescope: Newton 406/1830 mm

Magn: 215x


Field: 14'

NE Lim.mag: 6.5

Background sky: 2

Seeing: 2

Height: 64
Visuality: I, IV
Weather: -9C

Very clear and sharp spiral structure is visible with direct vision. There are three brighter areas in the spiral arms. An arm, which starts south-side of the core, is much brighter and it has two brightenings. Other arm is very long and it has a brighter area on west. The core is pretty small and bright, almost stellar and elongated in E-W. The bridge between M51 and NGC 5195 is extremely faint and visible only with averted vision when M51 is out side of the field. NGC 5195 is roundish haze which has a pretty tiny core, there are also some other structure visible. The hardest object in this field is a minor galaxy IC 4278 on the east side. It's obvious but barely visible with averted vision.