RCW 104

RING NEBULA AROUND WOLF RAYET STAR WR-75 IN NORMA

(Image centered at: ra 16:25.32 / dec -51:36)

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Click to see Wolf Rayet 75 Labeled

 July 2020 - Home Backyard in Martinez, Buenos Aires, Argentina

DATA

TYPE: Ha-Emission Region

APPARENT MAGNITUDE WR 75:  10,22

APPARENT DIAMETER: 25 x 35 arc minutes

DISTANCE: 13000 light years

IMAGE INFORMATION

SCOPE: ORION OPTICS UK 8" f5 Newtonian w/Televue Paracorr working at f5,75

CAMERA: QSI 583 WS

MOUNT: SKY WATCHER NEQ6

FILTERS: Baader LRGB Set

SKY CONDITIONS: Urban Skies

EXPOSURES: LHaRGB (30,160,40,40,40) Ha in bin 2x2; LRGB bin 1x1 

OBJECT DESCRIPTION AND IMAGE SESSION

RCW 104 is an oval shaped emission nebula close to the plane of our Milky Way in the southern constellation of Norma.  It is part of 180 objects of the RCW catalogue that was published in 1960 by Alex Rodgers, Colin Campbell and John Whiteoak under the direction of Bart Bok.

The emission material is being expanded by the strong stellar winds produced by the star WR 75. Wolf Rayet stars are extremely hot. They surface temperatures range from 30,000 k to around 200.000 k, hotter than almost all other stars. They have broad of spectra, but lack in hydrogen.

Below the mentioned star labeled following SIMBAD information.

WOLF RAYET 75 WITHIN RCW 104 Ha EMISSION NEBULA REGION

100% RESOLUTION LHaRGB