A Maths Problem for You

Posted on January 15, 2024 by Greg Parker

Here’s a simple little maths problem for you to look at, if you like that sort of thing.

For what value of x does the following equation hold true?

x^n + 2.x^n+1 = x^n+3

Where x^3 is x cubed.

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Definitive M31

Posted on January 11, 2024 by Greg Parker
Definitive_M31_Forums

I sent a friend a low-res version of M31 and they asked if they could have the hi-res version to print out and put on their wall. Now it gets embarrassing – can’t find the hi-res version anywhere. So I have to go back to the original datasets (Sky90 and Hyperstar 4 data) composite them, completely reprocess them, and have another go. The result is above. Close to the original low-res version but not exactly the same.

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The Full Stellar Spectral Classification

Posted on January 7, 2024 by Greg Parker
Full_Spectral_Star_Montage_Forums
Kemble’s Cascade alone has R N and S-type stars in the frame. In case the labelling on the image itself doesn’t come out too well, the TOP labelled star is BD Camelopardalis S-type, the MIDDLE star is V Camelopardalis N-type, and the BOTTOM labelled star is UV Camelopardalis R-type. I have an image of another S-type star lying near Rigel and it too looks the same washed out colour as BD Camelopardalis, so although it looks odd (in not being VERY red) it appears to be correct.
 
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Stellar Spectral Classes

Posted on January 5, 2024 by Greg Parker
Spectral_layer_Forums

I just put this montage together of stellar spectral classes with some real examples.

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M33 – The Triangulum Galaxy

Posted on December 28, 2023 by Greg Parker
M33_AllData_Forums

Absolutely all the data I have on the Triangulum Galaxy.

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The Propus Region of Gemini

Posted on December 24, 2023 by Greg Parker
Propus_Region_Forums

Now there’s a LOT going on in this one! Central object is the Jellyfish nebula with bright star Propus. Top right we have TWO open clusters, the larger one is M35, and the smaller golden one to its right is NGC2158. Finally in the bottom right hand corner there is the Monkey Head nebula. Image captured using the Canon 200mm prime lenses with the M26C OSC CCDs. A total of 18 subs at 20-minutes per sub.

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The Whole of Canis Minor

Posted on December 23, 2023 by Greg Parker
Proc_Gomeisa_200mm_2frame_37subs_9mins_Forums

The whole of Canis Minor. Canis Minor only comprises 2 stars – Procyon (bright white star bottom left) and Gomeisa (blue star towards top right). This is a 2-frame mosaic using the Canon 200mm prime lenses and the M26C OSC CCDs. The image comprises 37 subs at 9-minutes per sub.

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Arcturus Wide Field

Posted on December 23, 2023 by Greg Parker
Arcturus_40subs_5mins_2frame_Forums

A 2-frame mosaic of the Arcturus region using the Canon 200mm prime lenses and the M26C OSC CCDs. This image comprises 40 subs at 5-minutes per sub. Note the Napoleon’s Hat asterism at the 5 o’clock position.

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The IC2087 Region in Taurus

Posted on December 22, 2023 by Greg Parker
IC2087_200mm_2600MC_26subs_15mins_Forums

Lots of Taurus Molecular Cloud dust in this one taken using the 200mm lenses and the ASI 2600MC Pro CMOS cameras on the MiniWASP array. This image comprises 26 x 15-minute subs and could do with at least the same amount of data again.

 

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Larger Field of View Flaming Star Nebula

Posted on December 20, 2023 by Greg Parker
IC410_IC405_Forums

Here is a larger field of view of the Flaming Star nebula region taken on the 200mm lenses, without stars.

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