Basic object information
Name: M 39
Type of object: Open cluster
Magnitude: 4.6
Size: 32.0'
Number of stars: 30
Magnitude of brightest star: 6.8
Object classification: III 2 p
Description: Cl,vL,P,vlC,*7...10
Notes: Large but loose cluster

Catalog position for epoch J2000.0
Right ascension: 21h 32m 12.0s
Declination: +48 26' 00"

Constellation: Cygnus


Observer: Iiro Sairanen
Obs. place: Kuopiola, Ruokolahti, Finland
Date/Time: 26/27.4.2003 1.15

Telescope: 16" Dobson f 4.5

Magn: 46x

Filter:

Field: 59'

NE Lim.mag: 6,2

Background sky: 3-4

Seeing: 2

Height: 35
Visuality: I
Weather: -5C

Laaja-alainen avonainen, jossa kymmenkunta 7 mag tähteä ja monia himmeämpiä.

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