Observation by Nick White: M25 Photometry

Uploaded by

Nick White

Observer

Nick White

Observed

2020 Jun 01 - 15:19

Uploaded

2020 Jun 03 - 15:26

Objects

M25

Target name

M25

Title

M25 Photometry

About this image

Long story short, a freebee on a small robotic telescope offered up an unplanned opportunity to do some CCD photometry of the open cluster M25 (my first ever attempt). Here's a plot of V versus B-V, raw data, showing the main sequence and the variable U Sgr which has moved off the main sequence within the cluster. It all looks plausible enough but keep in mind I'm a visual observer rather than a CCD bod...

Files associated with this observation

M25_CDM50b.png (14.8 kB)

Like this image

David Basey, Jeremy Shears, Peter Mulligan, Ray Emery, Alan Thomas, Dr Paul Leyland, Dr Andrew Smith, Andy Wilson, Nick Hewitt, Graham Winstanley, Robin Leadbeater

Comments

Andy Wilson, 2020 Jun 05 - 08:51 UTC

That's a great bit of astrophysics Nick!

Thanks for sharing,

Andy

Nick White, 2020 Jun 05 - 15:56 UTC

Thank you, Andy. I've made a similar plot for the globular M22 but which looks quite different, showing the giant branch sloping diagonally in the other sense like this... /

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