IC 4628 (aka Gum 56)

EMISSION NEBULA IN SCORPIUS

 (ra 16:57/ dec -40:20)

May 2013 - Home Backyard in Martinez, Buenos Aires, Argentina

DATA

TYPE: Emission Nebula

Apparent magnitude: n/a

Apparent diameter: 90 arc minutes

Distance: 6000 light years (estimated)

IMAGE INFORMATION

SCOPE: Carbon Fiber Ritchey Chrétien 8" f8 

CAMERA: QSI 583 WS

FILTERS: Baader LRGB, 2" IDAS LPS for all channels

SKY CONDITIONS: urban skies

EXPOSURES: LHaRGB (90,40,30,30,30)

OBJECT DESCRIPTION AND IMAGE SESSION

An impressive arc shaped rim of HII structure is located in the tail of the Scorpius constellation. The nebula is also known as Gum 56 after Australian astronomer Collin Gum who catalogued emission nebula using wide field photography. Nearby hot massive stars radiate the nebula with invisible ultraviolet light.

The center portion of the nebula is very bright and very difficult to process because the red saturation comes very easy. In this case I tried to put my best efforts to bring some red flavours to the main structure.