Celestial hemisphere:  Northern  ·  Constellation: Pegasus (Peg)  ·  Contains:  PK104-29.1
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Jones 1, Gary Imm
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Jones 1

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Jones 1, Gary Imm
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Jones 1

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Description

This object is a dim magnitude 15.6 planetary nebula located 2600 light years away in the constellation of Pegasus at a declination of +30 degrees. It is known as both Jones 1 (distinct from Jones-Emberson 1), and PK 104-29.1. 

This PN is 6 arc-minutes in width in our apparent view, which corresponds to a PN diameter of about 5 light years, larger (and likely older) than the typical PN.  As such, it is considered an ancient PN. My Astrobin collection of ancient PN is shown here.

OIII emission dominates the nebula, resulting in the teal color, although some faint HII emission is also present.  It appears that the interstellar medium (ISM) has impact the symmetrry of the bright torus ring.  The bluish star in the exact center of the nebula seems to be the progenitor star.

An interesting faint red “cloud” is seen below the nebula in my image.  This region is slightly higher in HII than OIII, leading to the reddish tint.  Its position leads one to believe that it is part of this PN.  It could be the remnants of ansae which sometimes occur at each extreme end of bi-polar flow, as seen more clearly in younger PNe such as Minkowski 3-1 or NGC 7009.  If it is one ansa, then where is the opposite ansa?  Assuming that our apparent view is nearly along the bi-polar axis, the other ansa could be towards the top of the image but hidden behind the upper part of the torus ring.

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