Planetary nebulae collage (high resolution) (Victor Van Puyenbroeck)

Planetary nebulae collage (high resolution)

I used the short exposure technique on a few planetary nebulae as they usually have high surface brightness. The uncooled ASI462MC produced surprisingly clean results for deepsky, even during a heat wave.

A few objects were imaged at low elevations, those results were noticeably more blurry. I kept total integration time low to compare relative brightness of all objects. Each 400x400 pixel field is 5x5 arcminutes.

Object ID - Common name(s) - size - exposure time
IC 3568 - Lemon slice, Baby Eskimo - 22 x 21 arcsec - 1200x500ms
NGC7027 - Jewel Bug, Pillow nebula - 23 x 20 arcsec - 1000x300ms + 95x3sec
NGC6543 - Cat's eye - 23 x 37 arcsec - 2400x500ms
NGC7026 - 51 x 28 arcsec - 412x2sec
NGC6826 - Blinking Planetary - 26 x 32 arcsec - 300x1sec
NGC7662 - Blue Snowball - 46 x 40 arcsec - 413x2sec
NGC7009 - Saturn Nebula - 55 x 30 arcsec - 2040x500ms + 591x1sec
NGC6905 - Blue Flash - 86 x 37 arcsec - 118x5sec
M57 - Ring Nebula - 98 x 72 arcsec - 140x2sec
NGC7008 - Fetus Nebula - 100 x 74 arcsec - 413x2sec
NGC6781 - Snow globe - 146 x 116 arcsec - 60x5sec
M76 - Little Dumbbell - 167 x 118 arcsec - 60x5sec

Focal length: 805 mm
Camera pixel size: 2.9 um
Resolution: 0.74 arcsec/pixel

Coma corrector was used for IC3568 and NGC6543. Almost all exposures used a Gain setting of 331, which minimizes read noise and still provides slightly over 8 bits of dynamic range. Stacked in AS!3 and PixInsight, deconvolution was applied. All images are presented at the same scale.

PixInsight Addicts
Astrophotographers of Belgium
Planetary Nebulae
Fast Newtonians
Cloudy Nights
Broadband under Bortle 7/8/9
Suburban Astrophotography

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