Globular Cluster Marathon

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  • #612212
    Paul Leyland
    Participant

    Many of you know that I have been imaging small planetary satellites of the gas and ice giants. My stamp collection is now almost full in that the remaining ones are below magnitude 22.0 at best. Some of you may be aware of https://britastro.org/section_information_/deep-sky-section-overview/observing-programmes/globular-clusters/the-gc-marathons-part-i-galactic-globular-clusters which I wrote a couple of years back. Unfortunately, a couple of links there were broken when the BAA site was updated but http://www.astropalma.com/Projects/GC_Marathon.html still works.

    Accordingly, I have now started imaging GCs and will eventually put them in the BAA gallery and my personal web pages. I have only managed 14 out of 158 so far but hope to pick up a few more in the next week while Sgr et al. are still visible. At least twenty are too far south for a telescope in La Palma and a few more are visible only in the IR. To summarize: only 10% have so far been done.

    I urge others to join in this escapade.

    #612233
    Paul Leyland
    Participant

    Since writing that GC article, I have discovered that another GC has been added to the zoo: Minni 22 which is located at 17:48:51.4 -33:03:40. It is quite small, with a half-light radius of 1.1 arcmin, and in a very crowded part of the Milky Way in Scorpius. This is why it went undiscovered until 2018. As it happens, it is well placed here for tonight and as long as clouds don’t intervene I intend to have a go. By the looks of the DSS images, I don´t expect it to look like anything other than a MW star field but hope to pick up some of the stars mentioned in the discovery paper https://iopscience.iop.org/article/10.3847/1538-4357/aadd06/pdf

    Won’t be easy, but we do these things not because they are easy but because they are hard.

    #612234
    Paul Leyland
    Participant

    As expected. Opened up the observatory at sunset and took a few snapshots of the moon. By the time that the sky was half-way dark all that could be seen was the moon and a sky full of moonlit cirrus.

    Mañana perhaps.

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