Author Archives: Greg Parker

Picture of the Week

Picture of the Week is Greg’s 3 asterism in Leo seen almost dead centre in this image. The image comprises 14 x 12-minute subs taken with the 200mm lenses and M26C OSC CCDs. I first discovered this asterism whilst scanning … Continue reading

Posted in Picture of the Week | Leave a comment

Picture of the Week

For this week’s “Picture of the Week” I have chosen my favourite asterism, namely Kemble’s Cascade. Not only is this a superb star cluster in its own right, but it also has 3 very special stars closely associated with it. … Continue reading

Posted in Picture of the Week | Leave a comment

Picture of the Week

A regular visitor to this website made the valid comment that the Andromeda image has been the latest one to be shown for far too long. Why has it been up there for so long? Very simple really, I haven’t … Continue reading

Posted in 200mm lens and ASI 2600MC-Pro camera, Canon 200mm prime lens, Picture of the Week | 2 Comments

M31 – the Final Cut

I just found another 6-hours of 40-minute subs of M31 taken with the Sky90 array, and I added this to the earlier composite. You can see the result above and it is virtually no different from the previous result. I … Continue reading

Posted in Hyperstar 4 and ASI2600MC-Pro, mini-WASP Array, Projects, Sky 90 and SXVF-M26C | Leave a comment

Composite Rosette Nebula

This image of the Rosette nebula is a composite using data from the 200mm lenses with ASI 2600MC Pro CMOS camera and Optolong filter, together with Hyperstar 4 data using an ASI 2600MC Pro CMOS camera and a UV/IR cut … Continue reading

Posted in 200mm lens and ASI 2600MC-Pro camera, Hyperstar 4 and ASI2600MC-Pro | Leave a comment

A Maths Problem for You

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.

Posted in News, Projects | 10 Comments

Definitive M31

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 … Continue reading

Posted in Hyperstar 4 and ASI2600MC-Pro, Sky 90 and SXVF-M26C | Leave a comment

The Full Stellar Spectral Classification

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, … Continue reading

Posted in News, Writing | Leave a comment

Stellar Spectral Classes

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

Posted in Writing | Leave a comment

M33 – The Triangulum Galaxy

Absolutely all the data I have on the Triangulum Galaxy.

Posted in Hyperstar 4 and ASI2600MC-Pro, Hyperstar and 814C, Hyperstar and SXV-H9C | Leave a comment