A new and improved ephemeris for the hot subdwarf eclipsing binary SDSS J082053.53+000843.4
SDSS J082053.53+000843.4, for brevity here referred to as J08205, is a 15th magnitude short period, 0.0962404(1)d (~2h 18.6m), detached eclipsing
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The brighter comets of 2007
This report describes and analyses the observations of the brighter or more interesting comets discovered or at perihelion during 2007, concentrating on those with visual observations.
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Saturn in 1998-’99
Richard McKim reports observations and images from the 1998 opposition of Saturn.
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Albert Francis Arthur Lofley Jones, DSc., OBE, FRAS, FRASNZ (1920-2013)
John Toone looks back at the life of Albert Jones, the most prolific variable star observer in the history of observational astronomy.
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Obtaining solar eclipse and planetary transit contact times using DSLR imaging
A simple method is presented to determine the times of contact of solar eclipses and planetary transits across the solar disk.
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A BAA spectroscopy initiative
Spectroscopy is now a practical possibility for amateur astronomers motivated to produce scientifically useful observations. The BAA is therefore launching
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Absolute Beginners No. 5: Right ascension and declination
Paul G. Abel takes a look at celestial coordinate systems.
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Recalling the 2003 transit of Mercury
As described in the previous Journal, Mercury will cross the Sun’s disk on Monday May 9. The timings for the
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