Category Archives: Uncategorized

VStar

Posted on October 20, 2012 by Gustav Holmberg

My work – “work”, this is supposed to be amateur astronomy! – in variable star astronomy is mainly observational. I love being out under the sky, estimating variables using the time-tested tools of variabilists that’s been around since, well, Argelander’s … Continue reading →

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Comet 168P/Hergenrother

Posted on October 7, 2012 by Gustav Holmberg

I observed comet 168P/Hergenrother yesterday, at October 6.88 (UT). Instrument: 20 cm Newton, 120 x. Location: Lund, Sweden. Sky: moderate quality, city lights. The coma was estimated to be 0.5′ and the magnitude 9.8 (Tycho catalogue comparison stars). The comet … Continue reading →

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Printing

Posted on July 20, 2012 by Gustav Holmberg

I’m printing a new batch of charts for variable star observing; in this electronic age, I still prefer to have paper charts with sequences of compstars with me out at the telescope. For one thing, they can handle the damp … Continue reading →

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SS Cyg in outburst

Posted on July 4, 2012 by Gustav Holmberg

Yesterday I observed SS Cygni at 11.2 and 11.1, the early stages of an outburst.

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Time for a nova?

Posted on May 15, 2012 by Gustav Holmberg

Since I got back to amateur astronomy in November 2011, after a hiatus since around 1990, I’ve had the opportunity to observe several types of objects and celestial phenomena: a total lunar eclipse; U Geminorum in outburst; a fading of … Continue reading →

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4C 32.55

Posted on May 3, 2012 by Gustav Holmberg

When reducing CCD images in Vphot, I often get several variables in the field, other than the star intended, especially with wide field instruments such as the iTelescope 10 cm refractor. The other day, as I was analysing observations of … Continue reading →

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Miras in the Kepler field

Posted on May 1, 2012 by Gustav Holmberg

We run a programme of studying 50 neglected miras in the Swedish variable star community. After having found out, by chance, that one of the stars was in the Kepler field, I decided to check out if more of our … Continue reading →

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Neglected miras

Posted on April 17, 2012 by Gustav Holmberg

Here is a status report (in Swedish) for the project on 50 neglected miras observed by SAAF/SVO observers. Update: Thomas Karlsson has made a page that gives an overview of the observations in SAAF V/SVO programme of neglected Miras.

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Variable star observers meet in Gothenburg

Posted on April 15, 2012 by Gustav Holmberg

Just came back from the very inspiring spring meeting of SVO/SAAF Swedish variable star observers. Here are some pictures:

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KK Aurigae

Posted on April 9, 2012 by Gustav Holmberg

I’ve been observing KK Aurigae for some six weeks or so. It is situated close to YY Aurigae, a star I am observing for a programme on neglected Miras together with some fellow Swedish amateurs, and sometimes it ends up … Continue reading →

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