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Active Region 10918/923/930.
Towards the end of 2006 the author monitored the Sun for an active Region that lasted possibly three solar rotations. The flaring that it underwent was remarkable for the fact that it occurred near Solar Minimum when the Sun is expected to be quiescent. Observing in Hydrogen-alpha light, a number of features associated with the region were seen to interact.
Volume 46, number 1. March 2007. P3
New Detectable Eccentricities of Southern Binary Star Systems.
Siramas Komonjinda, John B. Hearnshaw, David J. Ramm
The theory of tidal circulation and synchronization of binary star systems was investigated by many authors. This theory has been tested using the observed radial velocities of binary stars systems using few-kilometres-per-second-resolution spectrographs. Using the HERCULES spectrograph at Mt John University Observatory one can measure the radial velocities of celestial objects at a precision on the order of ten meters per second. In this research, more than 20 southern binary star systems that have circular or nearly circular orbits were selected. The preliminary analysis of 13 single-lined spectroscopic binaries shows that using the HERCULES spectrograph we can not only gain better results for the systems' orbits but also detect the small eccentricity of four systems which were assumed to be circular by prior works.
Volume 46, number 1. March 2007. P7
Comet McNaught 2006 P1 - the Comet that Blew our Socks off.
"look over in the south-west there, it looks like that hill has turned into a volcano with lave and smoke billowing out a giant plume of gas! Wait, that's no volcano, that's a comet!" Such is the impression that I and many others had at Stardate 2007 when we saw the brightest comet in forty years put on an absolutely mind-blowing celestial fireworks display. C/2006P1 (McNaught) became the most breath-taking "hairy star" since Comet Ikeya-Seki in 1965.
Volume 46, number 1. March 2007. P9
History of the Gifford-Eiby Lecture Fund.
Initially the Gifford-Eiby Lecture Fund was known as the Gifford Lecture Fund and it was set up to enable local Societies affiliated to the RASNZ to exchange lecturers on suitable topics. This article traces the history of the scheme from an initial suggestion made by the Auckland Astronomical Society in 1969 to the present day.
Volume 46, number 1. March 2007. P16
Book Review - "Bright Star: Beatrice Tinsley, Astronomer." by Christine Cole Catley, reviewed by William Tobin.
Volume 46, number 1. March 2007. P15