Basic object information
Name: M 23
Type of object: Open cluster
Magnitude: 5.5
Size: 27.0'
Number of stars: 150
Magnitude of brightest star: 9.2
Object classification: III 1 m
Description: Cl,B,vL,pRi,lC,*10..
Notes: 100 members to 13th mag

Catalog position for epoch J2000.0
Right ascension: 17h 56m 48.0s
Declination: -19 01' 00"

Constellation: Sagittarius

Observer: Iiro Sairanen
Obs. place: Base del Teide (2280m above sea level), Tenerife, Spain
Date/Time: 18/19.4.2004 5:17

Telescope: Newton 110/805mm

Magn: 64x


Field: 47'

NE Lim.mag: 7,0

Background sky: 2

Seeing: 3

Height: 41
Visuality: I

Weather: +9˚C, perfecto

Beatuful starchains all over the cluster. About 70 stars visible.