M1-75 (planetary nebula) (lowenthalm)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: HD331798 · HD331803 · PK068-00.1 · TYC2670-1190-1 · TYC2670-3026-1 · TYC2670-3140-1 · TYC2670-3434-1 · TYC2670-962-1

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M1-75 (planetary nebula)

Acquisition type: Lucky imaging

Powered byPixInsight

M1-75 (planetary nebula)

Acquisition type: Lucky imaging

I tried to capture the fainter tendrils of H-alpha emission around the bright core of the nebula, but only got a little of it and what I got didn't have much detail. The moon was just too bright even when using a duoband filter. I'll try again next year with the duoband filter and no moon! Still, pretty nifty little nebula. The best estimates for its distance is about 3900 parsecs, but this is a pre-Gaia mission estimate from 2008. Its not obvious which is the progenitor star, so parallax data isn't too much help without some spectrometry to figure out if the progenitor is a companion of one of the little yellow stars in the sky surveys obtained by the big PANStarrs telescope. I could not detect any stars at the center of the nebula in my image, so they must be dimmer than 20th magnitude. This would point to a very distant nebula, so that distance of over 10,000 light years might not be too bad an estimate after all. The bright core of the nebula is only 20 arc seconds across, which again would indicate its pretty far away.

You can see numerous yellow K class and whitish G and F stars, but also several extremely red stars with very red halos. I suspect these are all carbon stars, which emit the majority of their light visible red and the infrared. When you look at the blue channel of the image, these red stars are almost invisible!

Each 9 minute sub was a live-stack of 135 x 4 second exposures. IRCut image data was used for the star colors and combined with the duoband image data of the nebula itself.

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Planetary Nebula

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Status	Advanced success
Started	...
Astrometry.net job	6721364
PixInsight job	76OAJXH0LM6GFR0BGNW81ZK5DFRQOEWM
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h04m44s.377
RA (top/left)	20h05m21s.220
RA (top/right)	20h04m07s.897
RA (bottom/right)	20h04m07s.805
RA (bottom/left)	20h05m20s.758

Dec (center)	+31°27′25″.15
Dec (top/left)	+31°33′21″.14
Dec (top/right)	+31°33′24″.20
Dec (bottom/right)	+31°21′28″.35
Dec (bottom/left)	+31°21′25″.68

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M1-75 (planetary nebula)

M1-75 (planetary nebula)

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M1-75 (planetary nebula)

M1-75 (planetary nebula)

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