Basic object information
Object name: Ru 20
Object type: Open cluster
Magnitude: 9.5
Size: 10.0'
Number of stars: 30
Magnitude of brightest star: 11.6
Object classification: III 2 m

Catalog information
RA (J2000.0): 07h 26m 42.0s
Dec (J2000.0): -28 53' 00"

Constellation: Canis Major

Observer: Iiro Sairanen
Obs. place: NOT (2390 m), La Palma, Spain
Date/Time: 29/30.3.2008 22:55

Telescope: Newton 110/805 mm

Magn: 115x

Filter:

Field: 43'

NE Lim.mag: 7.4

Background sky: 1

Seeing: 2

Height: 26
Visuality: II
Weather: +4C, huminidy 27%, wind 16 m/s (NE), seeing 0.8"

About dozen stars in the wedge-shape around the 9 mag star.