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The Journal of the British Astronomical Association, 2017 October

Volume 127, Number 5

Here is part II of John Rogers’ seminal study of Jupiter’s South Equatorial Belt cycle in 2009-2011. We also show some amazing images by BAA members from the 2017 August 21 total solar eclipse, and Paul Abel’s ‘Absolute Beginners’ tutorial no. 11: ‘Astronomical Seeing’. 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

The total solar eclipse of 2017 August 21
Hazel McGee (Ed.) & Peter Parish
From the President
Jeremy Shears
Two autumn comets
Nick James

Refereed Papers

Mapping the infrared thermal emission from the surface of Venus, 2017 April-May
Employing a novel narrow-band filter technique, Australian BAA observers Phil Miles & Anthony Wesley have been able to achieve a new level of resolution for amateur imaging of the infrared thermal emission from the nightside of Venus. In addition to revealing topographic details, images from 2017 April-May reveal at least one compact, infrared-bright spot located within a topographic depression upon the surface. We discuss the interpretation of this bright spot, and the question of whether it was or was not a temporary feature.
Richard McKim
Jupiter's South Equatorial Belt cycle in 2009--2011: II. The SEB Revival
A Revival of Jupiter’s South Equatorial Belt (SEB) is an organised disturbance on a grand scale. It starts with a single vigorous outbreak, from which energetic storms and disturbances spread around the planet in the different zonal currents. The Revival that began in 2010 was better observed than any before it. The observations largely validate the historical descriptions of these events: the major features portrayed therein, albeit at lower resolution, are indeed the large structural features described here.
John H. Rogers
Observing Sunspots from 1958 to 2015
This paper describes methods and long-term observations of sunspots made between 1958 and 2015, an interval covering more than 5 solar cycles.
R. J. Livesey
The colour and temperature evolution of the plateau phase of SN 2012aw in Messier 95
BVRI and unfiltered MicroObservatory CCD observations of SN 2012aw covering up to 124 days following the explosion of the supernova are reported together with observations submitted to the BAA VSS Online Database. The photometry shows a plateau in the R and I passbands lasting ~100 days and gradual declines in brightness in the B, V and clear passbands over the same period.
Martin J. F. Fowler