IC 5148 A SMALL Planetary Nebula (Alex Woronow)

Celestial hemisphere: Southern · Constellation: Grus (Gru) · Contains: IC 5148 · PK002-52.1

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IC 5148 A SMALL Planetary Nebula

Powered byPixInsight

IC 5148 A SMALL Planetary Nebula

IC 5148

OTA: RCOS (12.5” f/8)

Camera: SBIG STXL11002

Observatory: Heaven’s Mirror, Au

EXPOSURES:

Red: 8 x 120 sec

Blue: 9 x 120

Green: 11 x 120

Hydrogen: 15 x 1800

Oxygen: 10 x 1800

Total exposure ~13.4 hours

Image Width: ~11 arc-minutes

Processed by Alex Woronow (2019) using PixInsight, Matlab, and others

The planetary nebula, IC 5148, is only two arc-minuets across--a difficult target for a small scope. It occupies on 0.4% of the RCOS’s image frame; so this image is greatly enlarged and aggressively cropped (to about 9% of the full frame size).

This nebula planetary, as with all planetary nebulae, results from a moderate-size (sun like) star reaching its end of life. The star expands into a Red Giant, and expels it outer atmosphere. The expelled shell is ionized by the exposed core of the star and ‘shines’ as a planetary nebula. IC 5148, at about 3000 light-years, is the fastest expanding planetary nebulae known. It is expanding at about 50 km/sec. Planetary nebulae are thought to dissipate and fade from detection in a few tens of thousands of years. In the process of blending into the galaxy’s background of gas, they enrich that interstellar medium with elements heavier than the primordial hydrogen and abundant helium.

This is 'natural' color in that Ha was mixed into the red channel and OIII was mixed into the gree and blue channels.

Narrowband imaging
Planetary Nebulae
Unique or Unusal Deep Sky Targets

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Status	Advanced success
Started	...
Astrometry.net job	2957256
PixInsight job	V3ZV9JZQ5Q2EE7UE8BEG4ZWE6AM4D2OC
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	21h59m34s.666
RA (top/left)	21h59m12s.153
RA (top/right)	21h59m02s.395
RA (bottom/right)	21h59m57s.263
RA (bottom/left)	22h00m06s.948

Dec (center)	-39°23′11″.40
Dec (top/left)	-39°16′56″.53
Dec (top/right)	-39°27′32″.24
Dec (bottom/right)	-39°29′23″.75
Dec (bottom/left)	-39°18′49″.80

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IC 5148 A SMALL Planetary Nebula

IC 5148 A SMALL Planetary Nebula

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IC 5148 A SMALL Planetary Nebula

IC 5148 A SMALL Planetary Nebula

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