Abell 7 (PK215-30.1) (Los_Calvos)

Celestial hemisphere: Southern · Constellation: Lepus (Lep) · Contains: PK215-30.1

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Abell 7 (PK215-30.1)

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Abell 7 (PK215-30.1)

Our publication today is a trial on an object of very low surfacic magnitude (-16) but we wanted to try to image even thoug

h all the photos on the net are taken with instruments large and/or very open. The OIII brutes show a barely discernible signal and it was impossible to discern anything about the Ha... A stacking on 10 poses showed us that a signal was nevertheless visible, we tried to image the beautiful. So here's the result with a 315mm of Fd 8, it's below what we hoped but much better than we could have feared.

Abell 7 or PK215-30.1

The very discrete and ancient planetary nebula Abell 7 is about 1,800 light-years away, just south of Orion, in the constellation Lepus. Surrounded by stars from the Milky Way and angularly close to distant background galaxies, its spherical shape of some 8 light-years in diameter is sketched in this telescope image. Internal details are revealed through the use of filters. Hydrogen and nitrogen emissions appear in shades of red while oxygen emissions are blue-green. These nuances are absolutely imperceptible to human vision. The planetary nebula phase represents a very brief episode of the end-of-life of the stars that our own Sun will experience in 5 billion years, when it expels its outer layers. Abell 7 has an estimated age of 20,000 years, with its central star WD 0500-156 which is probably a double system with a dwarf companion located at 0.91 sec, which became a pale white dwarf after 10 billion years of intense radiation.

Pictured is the galaxy at the right is PGC 1611.

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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.
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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	4184392
PixInsight job	1I9TMXPEL2DDB6JU8FWW2AGNJFVN0LC9
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	05h03m08s.393
RA (top/left)	05h04m21s.484
RA (top/right)	05h01m57s.837
RA (bottom/right)	05h01m55s.216
RA (bottom/left)	05h04m19s.151

Dec (center)	-15°38′04″.23
Dec (top/left)	-15°20′17″.46
Dec (top/right)	-15°19′44″.51
Dec (bottom/right)	-15°55′48″.28
Dec (bottom/left)	-15°56′22″.21

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Abell 7 (PK215-30.1)

Abell 7 (PK215-30.1)

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Abell 7 (PK215-30.1)

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