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The Journal of the British Astronomical Association, 2014 October

Volume 124, Number 5

Viewing the heart of a comet, the drawings of George Alcock, and 2014's spectacular phenomena of Jupiter's satellites.

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

Noctilucent cloud in 2010-2014
Ken Kennedy
From the Journal archive
John Chuter

Observers' Forum

A spectrum and image of comet 2014 E2 (Jacques)
David Boyd

Also in this issue

George Alcock: an artist among the planets
The 2014 George Alcock Memorial Lecture, given at Burlington House, Piccadilly, London, on 2014 May 28
Richard McKim
A plaque to B.M. Peek at the Simon Langton School
A school in Canterbury honours a former Director of the BAA Jupiter Section
John Rogers

Refereed Papers

Analysis of lunar crater timings, 1842-2011
Crater timings are made during a total or partial lunar eclipse as the Moon slowly glides through the Earth’s central shadow cone, or umbra. We have gathered 22,539 observations made at 94 lunar eclipses since 1842 – the largest collection of crater and contact timings ever compiled. In this paper we analyse these timings to derive an improved characterisation of the umbra’s size, shape, and stability over time.
David Herald & Roger W. Sinnott
The comets of 2002 (Part 1)
This report is the thirteenth in the annual series which gives for each comet: the discovery details, orbital data and general information, magnitude parameters and BAA Comet Section observations. The year was somewhat unusual with several bright comets.
Jonathan Shanklin
Spectroscopic observations of the bright RV Tauri variable R Scuti
A series of spectra of the RV Tauri star R Scuti taken as it rose from a deep minimum to a bright maximum during 2013 October and November reveals major changes taking place in the photosphere and outer atmosphere of the star. This may be the first such series of spectra and demonstrates the capability of amateur spectroscopy for studying these complex stars.
David Boyd