COLLINDER 240 - NGC 3572 - HOGG 10 & 11

OPEN CLUSTER ASSOCIATED WITH NEBULOSITY IN CARINA

 (IMAGE CENTRED IN NGC 3572 ra 11:11/ dec -60:19)

CLICK IN THE IMAGE FOR A HIGH RESOLUTION VIEW

April 2013, Home Backyard in Martinez, Buenos Aires, Argentina

DATA

TYPE: Open Cluster Complex & Planetary Nebula

Apparent magnitude: Cr 240 3.9 ; NGC 3572: 6.6 ; Hogg 10: 6.9 ; Hogg 11: 8.1

Apparent diameter: Cr 240 25 arc minutes; NGC 3572: 7 arc minutes; Hogg 10: 3 arc minutes; Hogg 11: 1.5 arc minutes

Distance: not found

IMAGE INFORMATION

SCOPE: Carbon Fiber Ritchey Chrétien 8" f8 

CAMERA: QSI 583 WS

FILTERS: Baader RGB, IDAS LPS 2 for all channels

SKY CONDITIONS: urban skies

EXPOSURES: LHaRGB (40,40,40,40,40)

OBJECT DESCRIPTION AND IMAGE SESSION

Per Collinder was a Swedish astronomer who among other things published a catalog of Open Galactic Clusters. It was published in 1931 as and appendix to Collinder paper "On structural properties of open galactic clusters and their spatial distribution". Cataloged objects may be denoted as Col or Cr + the catalog number. (*)

In this case we aimed at Cr 240 a open cluster that also includes NGC 3572 (center of the image) and two concentrated and small clusters: Hogg 10 & Hogg 11, center left and below to the left respectively. To the right a nebulosity structure that continues its way to NGC 3532.

(*) Wilkipedia