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Jean Meeus sets the standard for such celestial calculations – and anomalies. I would think he has an article somewhere for centuries of predictions.
There is also a discussion at https://astronomy.stackexchange.com/questions/10901/how-did-meeus-calculate-equinox-and-solstice-datesSpelling mistake in Q33: it’s Trifid
PS I tend to use typeform.com for surveys as the results are more detailed (downloadable spreadsheet) while still being free to run (!) and you’re able to ask unlimited and multi-type questions.
I didn’t get the email despite others about nacreous clouds etc. Fairly happy but made couple of suggestions about content.
I do think the forum is about right now it’s organised by observing section as I sugested a while back 🙂
Thanks that’s useful. I rarely get to London these days and by the time I recovered my ballot paper with some spare time for consideration of voting the deadline has passed. Any thoughts on e-voting as the RAS does?
I hadn’t seen JM’s piece but the top part looks like a header that may (or may not) have been inserted after your query. If the piece had omitted a reference to the BAAH then that’s certainly odd. I value the Handbook greatly though there are now many online resources as well. How much use I make depends on clear skies which vary enormously over a year and also on lunar phase.
Thanks for your suggestion. Unfortunately Sky Safari isn’t on the Amazon app list so I went for Skeye Pro which is also updated for comets. Had to pay £1.50-odd on top of my promo credit but I can download it to all my devices. Pleased so far.
At midnight on Jan 22/23 I made Lovejoy slightly smaller, fainter and less condensed than a week ago, though it was at a lower elevation with low level fog and 12×32 B eyepieces dewing up. Fingers crossed for another clear evening for better comparision over weekend.
With poor weather recently I’ve only managed a couple of views. Not naked eye from central Bristol and no sign of the tail with 12×32 binocs but certainly an impressive sight. I made it larger and slightly brighter and more condensed on Jan 13th compared with 10th. If next week goes cold and wintry then may still manage to make the most of the perihelion ‘plateau’.
Hi Nick, feel free to link to a webpage, but what is the overview of your system, and the details for getting meteor mags to 0.1? I also note you’re not getting fainter than about mag 2 for showers or sporadics. Is this because of the system or sky conditions during the session? (Yes I know the Moon was around over Perseid maximum). Just interested in any limitations. Thanks
We all have to start somewhere, from ‘getting our eye in’ on the planets, discerning faint detail in comets and galaxies, getting fine resolution on double stars, and making judgements on intermediate magnitudes compared with reference stars for the variables. So not surprisingly digital users also have to start somewhere.
Whilst I’ve not read the book either, it seems a wider readership is served by starting with basics (which experienced, almost professional, observers can skip or disagree with), though to some pretty detailed material in an appropriate context for advanced amateurs.
It would be interesting, for instance, to know about Damian Peach’s first/early efforts in order to attain Hubble quality images nowadays. Would he have been overawed by talk of calibrations?
