Basic object information

Object name: M 3
Object type: Globular cluster
Magnitude: 6.3
Size: 18.0'
Object classification: VI
Description: !!,eB,vL,vsmbM,st 11..
Notes: Lord Rosse-sev dark marks within 5' of center

Catalog information

RA (J2000.0): 13h 42m 12.0s
Dec (J2000.0): +28 23' 00"

Constellation: Canes Venatici

Observer: Iiro Sairanen
Obs. place: Härskiänsaari, Ruokolahti, Finland
Date/Time: 22/23.4.2006 23:15

Telescope: Newton 457/2280 mm

Magn: 309x


Field: 10'

NE Lim.mag: 6.6

Background sky: 2

Seeing: 2

Height: 54
Visuality: I
Weather: -2C

A very impressive globular cluster in Canes Venatici. Hundreds of stars resolved easily at 309x, the cluster is somewhat elongated in N-S direction and all through granular. Darker areas in N, SE and E.