NT Aps, a southern sky W UMa stellar system with a decreasing period.
Bibcode: 2012MNSSA..71...72M
Middleton, C. T.
South Africa
Abstract
NT Aps, a W UMa star in the southern hemisphere, was observed in white light in 2007 and Band V filter in 2008 using personal telescopes from South Africa. From the Hipparcos ephemeris of 1991 a decrease in period of ~125 seconds per year for the binary is detected. Furthermore, software modeling packages of BINARY MAKER 3 and PHOEBE were employed to constrain the parameters of the binary components. The result of the modeling exercise is presented.
2012
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Monthly Notes of the Astronomical Society of South Africa
Hipparcos
1