[TrevorW]

NGC 6164 is a bipolar emission nebula of about 4 light-years across that lies some 4,200 light-years away in the southern constellation of Norma. It is approaching us at approximately 53.9 kilometres per second.
Its symmetric gaseous shroud and faint halo surround the blue, young, central star HD 148937, the brightest member of a triple star system orbiting around each other, which fierce stellar winds – of about 8 million kilometres per hour – created this nebula. This hot, luminous O-type star is some 40 times as massive as the Sun and just 3 to 4 million years old. In another 3 to 4 million years the massive star will end its life in a supernova explosion.
NGC 6164’s bipolar symmetry, as well as its extensive halo makes it similar in appearance to planetary nebulae – the gaseous shrouds surrounding dying Sun-like stars. Expanding into the surrounding interstellar medium, the material in this halo is likely from an earlier outburst of the central star, about 4000 years ago
Equipment:
GSO 10" f/8 Truss RC Losmandy G11 Mount guided PHD2 Orion Starshoot on 60mm guide scope
QHY 268c one shot colour camera, -10c, . Gain 57 Offset 30 NINA capture software, with SVbony dual band filter
Time/Locale:
The best of 77 frames 4 min long exposures a total of 5hrs 8min captured 26-27/4/2024 Bortle 6 sky Najm Nazm Observatory Moon 90% cool evening no wind but high misty cloud so seeing not the best
Processing: Stacked SIRIL, then P2, PS6