Basic object information

Object name: NGC 2237
Popular name: Rosette Nebula
Object type: Bright nebula
Size: 80.0'x50.0'
Object classification: E
Description: pB,vvL,dif,part of eL nebs ring ar 2239

Catalog information

RA (J2000.0): 06h 30m 54.0s
Dec (J2000.0): +5 03' 00"

Constellation: Monoceros

Observer: Iiro Sairanen
Obs. place: La Cogolla, Gran Canary, Spain
Date/Time: 31/1.2.2005 23:10

Telescope: Newton 110/805 mm

Magn: 20x

Filter: UHC/O-III

Field: 149'

NE Lim.mag: 6.4

Background sky: 2

Seeing: 3

Height: 66
Visuality: III
Weather: +10C, windy

Rossette Nebula. This is an impressive object! The nebulosity is annular and brightest on the NW edge. A UHC or O-III filter makes the nebula stand out much better and improves the contrast. Bright open cluster NGC 2239 lies in the middle of the ring.