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Abell 79 nebula / supernova remnant

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#1 meegja

meegja

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Posted 05 December 2020 - 03:05 AM

This one took over a month to complete: clouds, full moon, wind, and so on. In total over 8 hours data of which I only could use 4:40 hours.
And also a challenge because my Zwo ASI294MC Pro is back at the store for a check, so I used my Zwo ASI385MC planet camera. Hence the "big" stars.

 

This is Abell 79 (PN A66 79, PN G102.9-02.3, PK 102-2.1). This object is not very known and as such not much captured. So of course I had to dot it wink.gif

I gathered info from several online resources.

They are not sure if it is a planetary nebula or a supernova remnant. This also because the center star is a cool dwarf which has not enough energy to "feed" the nebula. So they suspect that there is a undiscovered hot companion.

The nebula is in Lacerta, has an apparent size of 2' x 1.5' and has a surface magnitude of around 16.
The distance is also not exactly known. I did find 3300, 4200 or 4800 light years.

 

The capture has a FOV of 16' 23" x 09' 12" and a resolution of 0.517 arcsec/px.

Also a record for me: I also used the Optolong L-eNhance filter (Ha, Hb and OIII) with 240 second unguided exposures. Was a lot of tweaking of the mount settings and the polar alignment had to be spot on. The Ioptron CEM25EC mount just keeps on amazing me.

 

Bortle 7/8
Meade LX200 8 "f / 10 ACF OTA
Ioptron CEM25EC mount (no guiding)
Optolong L-Pro filter

Optolong L-eNhance filter
Optec Lepus Standard 0,62x reducer
Zwo ASI385MC planet camera

 

Captured with SharpCap Pro
Optolong L-Pro: 37 x 120 sec / Gain 120 / Offset 15 / White balance R50 / B50
Optolong L-Pro: 42 x 180 sec / Gain 100 / Offset 15 / White balance R50 / B50

Optolong L-eNhance: 20 x 240 sec / Gain 120 / Offset 15 / White balance R50 / B50

 

Each set stacked in DeepSkyStacker with darks, flats and darkflats and saved as FITS.
Then a stack of the 3 FITS files.

 

Processed in SiriL and Photoshop
SiriL: background extraction, photometric color calibration
Photoshop: shadows/highlights, levels, curves, noise reduction (Neat Image plugin), star reduction.

 

Abell 79 PN G102.9-02.3_sm.jpg


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#2 hyperion0001

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Posted 05 December 2020 - 04:08 AM

Beautiful image. Nice detail and great focus.

Nice job!

terry


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#3 meegja

meegja

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Posted 05 December 2020 - 06:42 PM

Beautiful image. Nice detail and great focus.

Nice job!

terry

Thank you Terry! I will revisit it with the DSO camera for sure. Can get more detail out of it then :)



#4 hobbyknipser

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Posted 06 December 2020 - 11:22 AM

Very nice result and interesting background information about this PN! waytogo.gif 

Thanks for showing this object.

 

greetings

Andreas


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