Tetoora Road Observatory

 Welcome to my

Variable Star Pages

22″ Telescope “Infinity”

The science of Astronomy is unique. A great deal of astronomical research depends on the work of highly skilled amateur astronomers that provide a pivotal role in the constant monitoring of variable stars.

I observe and monitor variable stars particularly the cataclysmic (explosive ) variable stars (CVs) for outbursts. Recorded observations are then sent to various variable star organizations which include, the American Association of Variable Star Observers (AAVSO), the research section of the Royal Astronomical Society of New Zealand, Variable Stars South (VSS) and the Variable Star Network (VSNET) a global professional-amateur network of researches in variable stars. 

These pages tell my story, show a selection of light curves, links to articles, dramatic events, transient objects and cataclysmic variables (CVs).

300,000 Visual Variable Star Observations!

Article on my 300,000th visual variable star observation achieved on October 6, 2018, covering my observing career published by The British Astronomical Association Variable Star Section.

The current observations page will show my latest observations, outbursts detections, and activity on variable stars.

My visual light curve on the eclipsing symbiotic star AR Pav with a period of 604.5 days

22″ f/3.8 Telescope “Infinity”

Latest outbursts detected

March 9, 2019

CAROQ 190309.457 142 outburst
CENV342 190309.467 160 outburst
CENV442 190309.468 130 outburst
CMADM 190309.496 144 outburst
CNCGZ 190309.488 130 outburst
LEOX 190309.613 146 outburst
LUPBR 190309.599 144 outburst
MENAD 190309.510 155 outburst
MONCW 190309.494 128 outburst
NORIK 190309.615 131 outburst
ORIV1159 190309.436 137 outburst
PUPBX 190309.591 146 outburst
PYXVZ 190309.423 136 outburst
SCOV478 190309.626 148 outburst
VELV383 190309.467 129 outburst
VOLSY 190309.456 148 outburst
DDE 76 190309.589 144 outburst
SSS 110525:124508-381322 190309.483 123 outburst

The XMM-Newton space observatory will be observing the dwarf nova GW Librae on Aug.31 / Sept.1, 2017. The Space Telescope Science Institute (STScI) needs constant updates on the current state of GW Lib to make sure it is at a minimum. My latest observation sent at magnitude 16.5 shows it is around minimum.

GW Lib was discovered in 1983 as a 9th magnitude object. On April 12, 2007, I noticed GW Lib was rising to outburst, the first recorded outburst in 24 years since the discovery! GW Lib has had no further outbursts. My visual light curve of the 2007 outburst which lasted over 70 days. More here.

Observation of a Deep Visual “Eclipse” in the WC9-Type Wolf-Rayet Star, WR 76

My paper was published with Peredur Williams, Institute for Astronomy, Royal Observatory, Edinburgh on ” Observation of a Deep Visual “Eclipse” in the WC9-Type Wolf-Rayet Star, WR 76 ” One of the deepest found so far in these types of stars. A real challenge visually as the eclipse is well below 17.0 magnitude.

UY Puppis – A New Anomalous Z Cam Type Dwarf Nova

My paper was published October 2016 with Mike Simonsen on UY Puppis – A New Anomalous Z Cam Type Dwarf Nova. UY Pup is now one of only four known anomalous Z Cam stars!

Wolf-Rayet Star, WR 53

My paper published on the discovery of the first-ever recorded eclipse in the Wolf-Rayet star WR 53. After 5 years of constant monitoring, we now have a new variable star!

Wolf-Rayet Star WR 53     – Added to the International Variable Star Index July 2015.

OQ Carinae: A New Southern Z Cam Type Dwarf Nova

My paper published on the first-ever standstill of OQ Carinae after 14 years of study.

Discovery story on OQ Carinae!

OQ Carinae: Rod Stubbings – Patience, Persistence, and Purpose

100th year Anniversary of the AAVSO Top Visual Observers 2009-2010

Eye on the sky 

Amateur astronomers are making a unique contribution to science’s understanding of the universe, reports Marilyn Moore

Photo Chris Morley

iPhone Moon Snaps