Basic object information

Object name: M 100
Object type: Galaxy
Magnitude: 9.3
Size: 7.5'x6.1'
Position angle: 30
Object classification: SBbc
Description: pF,vL,R,vg,psbMrN,spiral-Rosse
Notes: SN 1901-14-59;NGC 4322 @ 5.2';NGC 4328 @ 6.1'

Catalog information

RA (J2000.0): 12h 22m 54.0s
Dec (J2000.0): +15 49' 00"

Constellation: Coma Berenices

Observer: Iiro Sairanen
Obs. place: Härskiänsaari, Ruokolahti, Finland
Date/Time: 20/21.3.2006 1:00

Telescope: Newton 457/2280 mm

Magn: 309x


Field: 10'

NE Lim.mag: 6.0

Background sky: 4

Seeing: 3

Height: 44
Visuality: II
Weather: -12C

Finally I was able to see the SN 2006X in M100. This was the third time; clouds have spoiled my previous attempts. I didn't have finder chart so I had to be very intent with the stars on the galaxy. After one hour viewing I was absolutely sure that the supernova is little to south from the core. Photos ensure my observation. I was surprised how faint it is, estimated over 15 mag. M100 itself is a very beautiful spiral galaxy. Spiral structure is pretty easy at 228x. Almost round core, the northern arm is little brighter and sharper than southern.