Basic object information
Object name: NGC 4490 & SN2008ax
Object type: Galaxy
Magnitude: 9.5
Size: 6.4'x3.2'
Position angle: 125
classification: SBcd
Description: vB,vL,mE130,r,sf of 2
Notes: H I 198;disrupted;P w NGC 4485 @ 3.5'

Catalog information
RA (J2000.0): 12h 30m 36.0s
Dec (J2000.0): +41 39' 00"

Constellation: Canes Venatici

Observer: Iiro Sairanen
Obs. place: Härskiänsaari, Ruokolahti, Finland
Date/Time: 26/27.4.2008 0:45

Telescope: Newton 457/2280 mm

Magn: 326x

Filter:

Field: 15'

NE Lim.mag: 5.3

Background sky: 5

Seeing: 4

Height: 68
Visuality: I
Weather: +0C, astronomical twilight

Full darkness has gone till next autumn, but NGC 4490 was still a superb galaxy with a 7 mm Nagler. Spiral arms are very open, the northern arm is much longer than southern one. SN2008ax shone as a 14 mag star alongside the southern arm. There is also a faint star in the southern tip.