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The Journal of the British Astronomical Association, 2019 February

Volume 129, Number 1

From a violent outburst to a cosmic vanishing act, this Journal celebrates recent amateur discoveries. Achievements of early BAA member Alice Cook are to be found alongside present-day research of the Jupiter Section, while for aspiring discoverers, David Arditti explains how to set up a telescope..

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Selected highlights from this Journal:

Notes and News

Comet 46P/Wirtanen’s December close approach

Nick James

'Through which end do I look?' – the absolute basics of using a telescope

David Arditti

The nebula vanishes: a disappearance of McNeil’s Nebula

Nick Hewitt

Observers' Forum

Amateur discovery of a nova in the Andromeda Galaxy

George Carey

Eridanus: winter nights on the river

Nick Hewitt

BAA Update

BAA Weekend Meeting, Christchurch, Dorset: 2018 September 7–9

Alan Dowdell

Refereed Papers

Jupiter’s North Equatorial Belt & Jet I. Cyclic expansions & planetary waves

This article presents a synopsis of the activity in Jupiter’s North Equatorial Belt (NEB) from 1986–2010, and of the speeds of dark formations on its south edge and bright streaks (‘rifts’) in its interior. In particular I discuss NEB expansion events (NEEs), which took place every 3–5 years during this time, and how the various features of the NEB are involved in them.

John H. Rogers

The mean distance from the Earth to the Moon

The mean value (over time) of the distance between the centres of the Earth and the Moon is 385,000 km, not 384,400 km as given in many texts. This is based on the Moon’s mean equatorial horizontal parallax.

Jean Meeus

Alice Grace Cook: An East Anglian meteor observer

Alice Grace Cook (1877–1958, and usually known by her middle name) was one of the first female Fellows of the Royal Astronomical Society. She was also briefly the Director of the British Astronomical Association Meteor Section. However, she is a little-known figure. This paper presents an overview of her life and contributions to astronomy.

William Barton

A lunar cryptomare dome near Cavalerius A and Hevelius A

In this study we examine a lunar dome, identified using CCD terrestrial imagery, LROC WAC images, Clementine multispectral data and the LROC WAC-based GLD100 DTM. The dome lies near Cavalerius A and Hevelius A, in a complex region known as Hevelius Formation, showing evidence of ancient (pre-Orientale) mare volcanism and cryptomare deposits.

Raffaello Lena & K. C. Pau

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The Journal of the British Astronomical Association, 2019 February

Notes and News

Observers' Forum

BAA Update

Refereed Papers