Basic object information
Name: M 4
Type of object: Globular cluster
Magnitude: 5.9
Size: 26.3'
Object classification: 9
Description: Cl,8 or 10 B* in line,rrr
Notes: Look for central bar structure

Catalog position for epoch J2000.0
Right ascension: 16h 23m 35.5s
Declination: -26 31' 31"

Constellation: Scorpius

Observer: Iiro Sairanen
Obs. place: Boca de Tauce (1980m above sea level), Tenerife, Spain
Date/Time: 16/17.4.2004 2:50


Telescope: Newton 110/805mm

Magn: 64x

Filter:

Field: 47'

NE Lim.mag: 6,9

Background sky: 2

Seeing: 3

Height: 29
Visuality: II

Weather: +2C, moist

An eye-catching central bar structure and several other brighter areas all around the object. Hundreds of stars resolved easily down to nucleus. One of the most beautiful globular.

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