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IC 2872 aka GUM 39 & GUM 40
BRIGHT EMISSIONS NEBULAS CENTAURUS
(ra: 11.29,00/ dec -62:57)
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
