Author Archives: Greg Parker

Picture of the Week

This week features bright star Vindemiatrix in the constellation Virgo. This is a Sky90 array image using the M26C OSC CCDs, and is a 2-frame (vertical) mosaic.

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24-hours on the Pleiades

This isn’t my deepest image of the Pleiades, but this dataset was taken over a couple of consecutive nights using the Sky90 array and the M26C OSC CCDs. This is 24-hours of total exposure time using 40-minute subs!

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Picture of the Week

This week we feature the Pickering’s Triangle region of the Veil nebula in the constellation Cygnus. This image comprises many hours of Sky90/M26C exposure.

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Picture of the Week

This week features the M44 (Beehive Cluster) “Stargate” in central Cancer. This is a composite image created using two outings (in different years) with the 200mm lenses and the M26C OSC CCDs in one year, and the 2600MC Pro CMOS … Continue reading

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Picture of the Week

This week we feature the bluest, brightest star in the sky – SPICA! Always low down in the murk in the south, this is a difficult one to do justice as it always has a broad fuzzy appearance due to … Continue reading

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The Golden Solid Angle – Full Derivation

Title: The Golden Solid Angle: A Three-Dimensional Extension of the Golden Ratio Abstract: The Golden Ratio (φ) and its planar analogue, the Golden Angle (α), are well-known mathematical constants that appear widely in Nature, design and geometry. In this short … Continue reading

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Picture of the Week

This week we feature the Propus region of Gemini which of course contains the well-known Jellyfish nebula, and if your field of view is big enough, the Monkeyhead nebula and open cluster M35 (and neighbouring open cluster NGC2158) as well. … Continue reading

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On Being a Photon

Imagine you are a photon. You suddenly come into existence, and without the passing of any time, and without travelling any distance, you suddenly disappear again. Did you even exist? Well you must have done because an astrophotographer on planet … Continue reading

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Composite Arcturus

I just combined last night’s 24 x 5-minute subs 200mm lens single framer with an older 40 x 5-minute subs 2-framer also using the 200mm lenses. This is the resulting Arcturus composite.

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Arcturus

Managed to get some imaging done last night. Arcturus with the 200mm lenses and 2600MC Pro CMOS cameras. 24 x 5-minute subs. Note the “Napoleon’s Hat” asterism at the bottom of the lower spike slightly to the right.

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