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The Journal of the British Astronomical Association, 2018 June

Volume 128, Number 3

Define the size of an asteroid with amateur observations, travel back in time to the BAA in the 1970s, and find your way around the spectacular dark nebulae of the summer sky: plenty for all in this Journal.

Log in or join the BAA today to view this journal online. A full list of contents is also available.

Selected highlights from this Journal:

Notes and News

From the President
Callum Potter

Observers' Forum

BAA Update

Obituary: John Wall (1932−2018)
Malcolm Gough & Mike Rushton
Obituary: Michael J. Hendrie (1931−2018)
Richard McKim & John Vetterlein

Also in this issue

Data Protection & Security
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Refereed Papers

The strange world of V. Axel Firsoff (1910−1981)
Axel Firsoff was one of the most controversial theorists and letter writers in the BAA’s history, submitting huge amounts of correspondence to the Journal between 1956 and 1981 and serving on the Committee of the Terrestrial Planets Section from 1979 to 1981. He was also a successful author, writing more than 20 books from 1942 until his death. In addition, Firsoff was a skilful artist, an accomplished skier, a lunar and planetary observer and an early pioneer in the use of colour filters.
Martin Mobberley
The opposition of Mars, 2010: Part I
This report summarises over 8,000 observations by 149 observers between 2009 March and 2010 September, covering martian northern late autumn to winter, spring and early summer (Ls= 232-156°). Part I discusses dust storms and albedo features.
Richard McKim
RZ Cas lightcurve and orbital period variations
A binary star model for RZ Cas is fitted to a set of high quality electronic magnitude observations of recent minima, deriving in the process some of the parameters of the system. This lightcurve is then fitted to raw observational data from the BAA, AAVSO, AFOEV and VSOLJ in order to determine the times of minimum. These observed times of minimum supplemented by data from the Lichtenknecker database are then compared to expected times and are shown to be consistent with several significant long-term changes in the period.
G. B. Chaplin, G. Samolyk & J. T. Screech
A previously unreported naked-eye sunspot observation: 1604 November
Evidence is presented of a previously unreported naked-eye sunspot observation in 1604. A report from a 17th century Hungarian history is analysed and possible alternative interpretations are discussed. Further evidence of high solar activity at the time is briefly examined.
John Simpson