NGC 6778 (Gary Imm)

Celestial hemisphere: Southern · Constellation: Aquila (Aql) · Contains: IC 1298 · NGC 6778 · PK034-06.1

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NGC 6778

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NGC 6778

This object is a very distant rarely imaged planetary nebula located 10,000 light years away in the constellation of Aquila at a declination of -2 degrees. Because of its distance away from us, this nebula appears tiny in our apparent view at only 30 arc-seconds. The true diameter of this nebula is 1.5 light years, which is fairly typical for a PN. As shown in the Astrobin mouseover, this object (NGC 6778) also was designated NGC 6785 by mistake.

The morphology of the nebula is well described in the 2018 paper by Guerrero and Miranda, "NGC 6778: A Disrupted Planetary Nebula Around a Binary Central Star". The visible central star is actually two - a close binary star system with an orbital period of just a few hours. The bright sections of the nebula comprise the "highly disrupted" equatorial ring (torus) around the center. The outflows of two bi-polar jets extend to lower left and upper right, having blown through the outer gas lobes which initially contained them.

This nebula resembles M76, except that here each end of the outer gas lobes are broken through. M76 is almost 10x larger to our view than this nebula.

As shown in the Astrobin mouseover, the open star cluster IC 1298 is towards the bottom right of the image. I only count 8 stars here at most, maybe less. Surely this must be one of the sparsest designated open clusters in existence.

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	2945453
PixInsight job	Z8U79I63JRSRWO7UHID212W6VXR8AWME
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	19h18m24s.925
RA (top/left)	19h18m03s.708
RA (top/right)	19h18m25s.809
RA (bottom/right)	19h18m46s.142
RA (bottom/left)	19h18m24s.450

Dec (center)	-01°35′46″.94
Dec (top/left)	-01°34′26″.84
Dec (top/right)	-01°41′14″.72
Dec (bottom/right)	-01°37′06″.70
Dec (bottom/left)	-01°30′19″.13

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