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)

Getting plate-solving status, please wait...
Abell 7 (PK215-30.1), 


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Abell 7 (PK215-30.1)

Imaging telescopes or lenses: PlaneWave Instruments CDK 12.5"

Imaging cameras: Moravian Instrument G4-16000

Mounts: Astro-Physics Inc AP 1100 GTO

Guiding telescopes or lenses: PlaneWave Instruments CDK 12.5"

Guiding cameras: Atik 414EX

Software: TheSkyX  ·  Adobe Photoshop CC 2020  ·  Pixinsight  ·  MaxPilote  ·  FocusMax4

Filters: Chroma Technology Chroma Ha 3nm  ·  Chroma Technology Chroma OIII 3nm  ·  Chroma Technology Chroma Blue  ·  Chroma Technology Chroma Green  ·  Chroma Technology Chroma R  ·  Chroma Technology Chroma L  ·  Chroma Technology Chroma SII 3nm

Accessory: Skyméca DO 3"

Dates:Oct. 27, 2020Nov. 10, 2020

Chroma Technology Chroma Ha 3nm: 194x1200" (64h 40') -20C bin 1x1
Chroma Technology Chroma OIII 3nm: 109x1200" (36h 20') -20C bin 1x1

Integration: 101h

Darks: ~50

Flats: ~7

Bias: ~200

Avg. Moon age: 17.62 days

Avg. Moon phase: 57.28%

Bortle Dark-Sky Scale: 1.00

Astrometry.net job: 4184392

RA center: 5h 3' 8"

DEC center: -15° 38' 4"

Pixel scale: 0.733 arcsec/pixel

Orientation: 0.931 degrees

Field radius: 0.417 degrees

Resolution: 2838x2958

Data source: Own remote observatory

Remote source: Observatorio El Sauce


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.


Sky plot

Sky plot


Abell 7 (PK215-30.1),