NGC 6302  -  Bug Nebula / Butterfly Nebula

80%  resolution (2.1MB)

80% crop (0.4MB)

Object data of NGC6302

Object type: Planetary nebula
Size: 3'
Magnitude: 7.1 mag
Constellation: Sco
Distance: 3,400 Ly
Notes: NGC 6302, also called the Bug Nebula or the Butterfly Nebula, is a bipolar planetary nebula in the constellation Scorpius. The structure in the nebula is among the most complex ever observed in planetary nebulae, including many interesting features such as ionization walls, knots and sharp edges to the lobes. The spectrum of NGC 6302 shows that its central star is one of the hottest stars in the galaxy, with a surface temperature of over 250,000 degrees Celsius. The hot central star is not visible, because a dark lane runs through the waist of the nebula obscuring the central star at all wavelengths.

The prominent dark lane has been shown to have an extraordinary dust chemistry, showing evidence for multiple crystalline silicates, crystalline water ice and quartz.

NGC 6302 contains a prominent northwest lobe which extends up to 3′ away from the central star and is estimated to have formed from an eruptive event around 1,900 years ago.

Exposure data

Date: 2018-07-07 until 2018-09-05
Location: ChileScope / Chile (2,000m)
Telescope: RC 1m f/6.8 (f=6,800mm) 
Camera: FLI PL16803 with Astrodon filters
Binning: L 1x1 / RGB 1x1 / Ha [OIII] 1x1
Mount: AltAz
Exposure time: L 36x5min / RGB 13x5min each / Ha [OIII] 16x10min each
Exposure time total: 11h 35min
Notes: Image acquisition by CEDIC team (Bernhard Hubl, Christoph Kaltseis, Herbert Walter, Wolfgang Leitner)

Image processing by Bernhard Hubl