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IC 2872 aka GUM 39 & GUM 40

BRIGHT EMISSIONS NEBULAS CENTAURUS

 (ra: 11.29,00/ dec -62:57)

 

 

CLICK FOR THE ANNOTATED VIEW

 

March - 2024, Sarandí, Gualeguaychú, Entre Ríos, Argentina

 


 

DATA

TYPE: Emission Nebula

APPARENT DIAMETER: 15 X 6  arc minutes

APPARENT MAGNITUDE (V): NA

DISTANCE: Estimated 6000 light years

 

IMAGE INFORMATION

INSTRUMENT: 6" ORION OPTICS UK (Ultra Grade Optics) w/Sky Watcher Coma Corrector (0.9x) working at at f4.5

CAMERA: QHY 183 MONO

MOUNT: VIXEN GDPX, OAG with Starlight Xpress Lodestar

FILTERS: BAADER LRGB Set

SKY CONDITIONS: rural skies - Bortle 4 - SQM 20.63

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

 

OBJECT DESCRIPTION AND IMAGE SESSION

This two emission nebula are part Lambda Centauri Nebula Complex that can be seen here in wider view.  IC 2872 or Gum 40 is the nebulosity in the lower part, while Gum 39 is in the upper side. North is up in the image.

Australian astronomer Colin Stanley Gum associates both nebulas and the star HD 99898. He gives a B8 class for this star, too cool to ionize the nebula. However, Cameron Reed gives a B2/5 III class and SIMBAD (following the Georgelins) gives a much hotter O9 V, making it more likely that this is the ionizing star. See on the image labeled below.

 

 


 

IC 2872 aka GUM 39 & GUM 40

IMAGE LABELED