Hemisphere:  Northern  ·  Constellation: Lynx (Lyn)
Jones-Emberson 1 (Revisited)  - A Very Blue White Dwarf, 



    
        

            Jason Guenzel
Jones-Emberson 1 (Revisited)  - A Very Blue White Dwarf
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Jones-Emberson 1 (Revisited) - A Very Blue White Dwarf

Jones-Emberson 1 (Revisited)  - A Very Blue White Dwarf, 



    
        

            Jason Guenzel
Jones-Emberson 1 (Revisited)  - A Very Blue White Dwarf
Powered byPixInsight

Jones-Emberson 1 (Revisited) - A Very Blue White Dwarf

Equipment

Imaging Telescopes Or Lenses
CELESTRON EdgeHD 800
Imaging Cameras
ZWO ASI1600MM-Cool · ZWO ASI174MM-Cool
Mounts
Orion Atlas Pro AZ/EQ-G
Filters
ZWO Green 1.25" · ZWO Red 1.25" · ZWO Blue 1.25" · Astronomik Deep-Sky R 1.25" · ZWO Luminance 1.25" · Astronomik H-alpha 6nm CCD 1.25" · Astronomik Deep-Sky B 1.25" · Astronomik Deep-Sky G 1.25" · Astronomik L-3 UV-IR Block 1.25"
Accessories
Orion Thin Off-Axis Guider (TOAG) · Moonlite CHL 2.5" Large Format Crayford Edge Focuser · Celestron 0.7x Focal Reducer
Software
Sequence Generator Pro · PixInsight · Adobe Lightroom · Adobe Photoshop · PHD 2
Guiding Telescopes Or Lenses
CELESTRON EdgeHD 800
Guiding Cameras
ASI120MM

Acquisition details

Dates:
Feb. 11, 2016 ·  March 11, 2016 ·  March 12, 2016 ·  March 17, 2016 ·  March 26, 2016 ·  March 29, 2016 ·  Oct. 25, 2018 ·  Nov. 19, 2018 ·  Dec. 9, 2018 ·  Jan. 4, 2019 ·  Jan. 5, 2019 ·  Jan. 13, 2019 ·  Jan. 14, 2019
Frames:
Astronomik Deep-Sky B 1.25": 25x240" (1h 40') (gain: 0.00) -20C bin 1x1
Astronomik Deep-Sky G 1.25": 25x240" (1h 40') (gain: 0.00) -20C bin 1x1
Astronomik Deep-Sky R 1.25": 25x240" (1h 40') (gain: 0.00) -20C bin 1x1
Astronomik H-alpha 6nm CCD 1.25": 81x240" (5h 24') (gain: 139.00) -20C bin 1x1
Astronomik L-3 UV-IR Block 1.25": 168x180" (8h 24') (gain: 0.00) -20C bin 1x1
ZWO Blue 1.25": 15x300" (1h 15') (gain: 0.00) -30C bin 1x1
ZWO Green 1.25": 15x300" (1h 15') (gain: 0.00) -30C bin 1x1
ZWO Luminance 1.25": 135x300" (11h 15') (gain: 0.00) -30C bin 1x1
ZWO Red 1.25": 15x300" (1h 15') (gain: 0.00) -30C bin 1x1
Integration:
33h 48'
Darks:
50
Flats:
50
Bias:
256
Avg. Moon age:
12.05 days
Avg. Moon phase:
42.54%
Bortle Dark-Sky Scale:
5.00

Basic astrometry details

Astrometry.net job: 2504001

RA center: 07h57m51s.4

DEC center: +53°2519

Pixel scale: 0.874 arcsec/pixel

Orientation: 248.392 degrees

Field radius: 0.235 degrees

Resolution: 1607x1080

Data source: Backyard

Description

Jones-Emberson 1 is a planetary nebula about 1600 light years away in the constellation Lynx. It is also known by the name corresponding to its galactic coordinates, PK164+31.1, which doesn't exactly roll off the tongue. Although incredibly faint with low surface brightness, it is actually one of the larger planetary nebulae in the night sky.

Long ago, the 16.8-magnitude central white dwarf collapsed from the original progenitor star. It shines a brilliant blue. As it compacted, it shed the outer shells of slowly expanding hydrogen gas. The central "void" is filled by a diffuse oxygen cloud. Together, the combination of emission from these gasses tint the nebula a range of rich tones.

One interesting aspect of this nebula is that there are at least a few background galaxies visible when looking through the central void. In fact, the field is rich with far-flung galaxies.

This image was compiled from two complete data sets I captured three years apart. Because of the incredible faint detail available in this one, I may come back a third time. But, for now, we'll say this year's revision is done.

Enjoy!

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