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The Journal of the British Astronomical Association, 2016 June

Volume 126, Number 3

Two superb pieces of historical research, and some state-of-the-art amateur observations which are helping the professionals tease out the mysteries of some of the sky's most enigmatic objects.

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:

Refereed Papers

Rømer revisited: A modern estimation of the speed of light from observations of Jupiter’s Galilean satellites
Ole Rømer (1644−1710) is remembered today for establishing, from observations of eclipses of the Galilean satellites of Jupiter, that the velocity of light is finite. This paper describes the use of amateur timings of Galilean eclipses observed during 2012−’14 to recreate Rømer’s work, together with a theoretical investigation of the accuracy of such approaches for estimating the speed of light.
James Appleton
SN2008S – A new class of optical transient in NGC 6946: an amateur discovery
The purpose of this paper is to bring to the attention of the amateur astronomical community the writer’s discovery of a previously unknown class of object, the significance of which does not appear to have been reported in amateur publications.
Ron Arbour
Patrick Henry Hepburn (1873−1929) - Part I: Solicitor, Eclipse-chaser and Major
The life and times of one of the BAA’s most extraordinary Presidents and eclipse chasers is described, including his fascination with the rings of Saturn, his remarkable physical and mental stamina, his complex home life and (in Part II) his tragic demise.
Martin Mobberley
Saturn in 1999−2000
A report of the Saturn Section (Director: M. Foulkes)
Richard McKim
Outbursts of the dwarf nova CSS 121005:212625+201948 in Pegasus
A monitoring programme of CSS 121005:212625+201948 covering nearly two observing seasons has shown that it is a typical SU UMa dwarf nova, but has one of the shortest supercycles of its class.
Jeremy Shears et al.