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The Journal of the British Astronomical Association, 2017 June

Volume 127, Number 3

Four comets observed from Winchester, full details of the 2009 SEB fade on Jupiter, and a historical note from one of our oldest members....

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

Bipolar magnetic regions on the Sun and their associated H-alpha features
Bipolar magnetic regions (BMRs) are the underlying cause of all photospheric and chromospheric solar activity including active sunspot regions, white light faculae and disturbances in the solar granulation. This paper describes how monochrome imaging with commercially available H-alpha telescopes can reveal intricate detail in BMRs.
Kevin J Kilburn
Jupiter’s South Equatorial Belt cycle in 2009−2011: I. The SEB fade
Cycles of fading and revival of the South Equatorial Belt (SEB) are the most spectacular large-scale events that occur on Jupiter. The most recent started in 2009, when the SEB suddenly ceased its convective activity and began to fade. Modern amateur images, combined with measurements by the JUPOS team, have revealed several new insights into the process. In this pair of articles, I synthesise all the important results of the 2010 Fade (this paper) and Revival (following paper).
John H Rogers
The ‘Great Filter Debate’
The Great Filter Debate took place in the BAA in the 1950s. As the writer was involved in the experiment, members of the Association may find the following account of interest.
Alan W Heath
The shock breakout cooling tail of supernova 2011dh in Messier 51
Unfiltered CCD observations acquired using the 6-inch [155mm] robotic telescopes of the NASA/Harvard Smithsonian MicroObservatory e-learning project covering the first 163 days following the discovery of the Type IIb supernova 2011dh in Messier 51 are presented.
Martin J F Fowler & Frank Sienkiewicz
The brighter comets of 2010
This report describes and analyses observations received of the brighter or more interesting comets discovered or at perihelion during 2010, concentrating on those with visual observations.
Jonathan Shanklin