AAVSO: American Association of Variable Star Observers

Southern Eclipsing Binary Minima and Light Elements in 2019

Volume 48 number 2 (2020)

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Tom Richards
Pretty Hill Observatory, Kangaroo Ground, Vic., Australia; tomprettyhill@gmail.com
Mark Blackford
Congarinni Observatory, Congarinni, NSW, Australia. markgblackford@outlook.com
Neil Butterworth
Townsville Observatory, Mount Louisa, Qld., Australia; neilb2@bigpond.net.au
Robert Jenkins
Theta Observatory, Salisbury, SA, Australia; robynnabara@ozemail.com.au

Abstract

We present 156 times of minima of 68 southern hemisphere eclipsing binary stars acquired in 2019, plus two earlier (V676 Cen). These observations were acquired and analyzed by the authors who are members of the Southern Eclipsing Binary group of Variable Stars South (VSS) (http://www.variablestarssouth.org), using DSLR and CCD detectors. For seven of the systems we have derived updated light elements and present those as well as O–C values for the VSS minima. This paper is the fifth in a series; previous papers were published in the Open European Journal on Variable Stars.