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Catalogue and alternative designations NGC 6729

 

Type Complex area of nebulosity
Position 18 24  33, -22 54 11
Constellation Corona Australis
Camera and Telescope STXL6303 and 36.8cm RCOS Ritchey Chretien
Focal Ratio F9
Exposure Details LRGB 60:60:45:40 with Astrodon series 2 filters all unbinned
Description

(from Mark Hanson's website) Cosmic dust clouds and young, energetic stars inhabit this telescopic vista, less than 500 light-years away toward the northern boundary of Corona Australis, the Southern Crown.

The dust clouds effectively block light from distant background stars in the Milky Way. But the striking complex of reflection nebulae cataloged as NGC 6726, 6727, and IC 4812 produce a characteristic blue color as light from the region's young hot stars is reflected by the cosmic dust. The dust also obscures from view stars still in the process of formation. At the left, smaller yellowish nebula NGC 6729 bends around young variable star R Coronae Australis.Just below it, glowing arcs and loops shocked by outflows from embedded newborn stars are identified as Herbig-Haro objects. On the sky this field of view spans about 1 degree. That corresponds to almost 9 light-years at the estimated distance of the nearby star forming region. Over to the left is asteroid 2263 Shaanxi just passing through.

 

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