Basic object information

Object name: NGC 2509
Object type: Open cluster
Magnitude: 9.3
Size: 12.0'
Number of stars: 70
Object classification: II 1 p
Description: Cl,B,pRi,lC,st S

Catalog information

RA (J2000.0): 08h 00m 48.0s
Dec (J2000.0): -19 03' 00"

Constellation: Puppis

Observer: Iiro Sairanen
Obs. place: Tocodoman, Gran Canary, Spain
Date/Time: 4/5.2.2005 23:51

Telescope: Newton 110/805 mm

Magn: 107x


Field: 28'

NE Lim.mag: 6.5

Background sky: 2

Seeing: 3

Height: 42
Visuality: II
Weather: +10C, windy

A beater-shaped open cluster in Puppis. There is a 11 mag star on the west edge. Strong background glow is visible even with direct vision. Stars are mainly 12 mag and fainter, the cluster is clearly detached. Few dozens of stars resolved.