Basic object information
Object name: M 3
Object type: Globular cluster
Magnitude: 6.3
Size: 18.0'
Surface brightness: 11.0
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: Lakasenpelto, Imatra, Finland
Date/Time: 25/26.4.2008 0:20

Telescope: Newton 110/805 mm

Magn: 109x

Filter:

Field: 29'

NE Lim.mag: 5.0

Background sky: 5

Seeing: 4

Height: 57
Visuality: I
Weather: +2C, astronomical twilight

This sketch has been made during the astronomical twilight thru thin upper clouds. Familiar shapes were out of sight but there were still hundreds of individual stars visible and the globular was completely granular.