Variable Stars

SAM III

HHO SAM III Geomagnetic monitor is now online.

22 June 2011

Poor sky conditions Bug HHO

HHO is suffering an unprecedented period of unfavorable weather conditions.  It's almost as if we have a monsoon season - without the rain!

17 January 2012

Spectra L-200

The L200 spectrograph has been calibrated and seen first light on Sirius and Spica.  See here for details

04 May 2011

Introduction

Variable Stars are the bane of my Minor Planet lightcurve work.  I pick comp stars for my reductions only to find that the comp star I have chosen is variable so I have to repeat the reduction work all over again with a new star.  The bonus, of course, is that I may well have discovered a new variable star in the process.  Of course these 'new' discoveries are reported and are in need of follow-up work to determine their spectral type, likely variable type and an accurate measurement of the objects magnitude.  Typically this will require filtered observations and all sky photometry.

On the nights that are not suited to Minor Planet Photometry I also undertake observations of Variable stars that the AAVSO report as in need of observations (those objects that have little or no coverage)  Typically I can completed about 50 stars in a night which covers off most of those 'in need' targets that are visible to me at any given time.

Discoveries

The following is a list of variable stars uncovered by HHO