Basic object information
Name: M 91
Type of object: Galaxy
Magnitude: 10.1
Surface brightness: 13.4 mag/sq arcmin
Size: 5.2'x4.2'
Position angle: 150
Object classification: SBb
Description: B,L,lE,lbM
Notes: NGC 4571 @ 27.0';H II 120;F outer arms in S pattrn

Catalog position for epoch J2000.0
Right ascension: 12h 35m 26.3s
Declination: +14 29' 49"

Constellation: Coma Berenices

Observer: Iiro Sairanen
Obs. place: Ahola, Joutseno, Finland
Date/Time: 2/3.4.2003 0.06

Telescope: 16" Dobson f 4.5

Magn: 244x

Filter:

Field: 13'

NE Lim.mag: 6,1

Background sky: 3

Seeing: 2

Height: 42
Visuality: I
Weather: -10C

Pyöreä galaksi, jolla tähtimäinen ydin.

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