Measures of Ten Sco Doubles and the Determination of Two Orbits

TL;DR

This paper reports precise measurements of ten star pairs in Scorpius using advanced imaging techniques, calibrates these measurements with known orbital data, and derives orbital elements for two pairs, enhancing astrometric data accuracy.

Contribution

It introduces new high-precision measurements of star pairs, calibrates them with established orbital data, and computes orbital elements for two pairs, advancing observational astronomy methods.

Findings

Measurements agree well with historic data and Gaia positions.

Internal uncertainties are approximately 0.06 arcsec in separation and 0.06 degrees in position angle.

Orbital elements for two star pairs are derived.

Abstract

We present measures for 10 pairs in the constellation of Scorpius using a C14 telescope, Lucky Imaging, and the Reduc software. The separations of Alpha Centauri AB, as determined from the orbital elements of Pourbaix and Boffin (2016), were used as an image scale and position angle calibrator. Our internal uncertainties are ~0.06 arcsec in rho and ~0.06 degree in PA. There is excellent agreement with historic data extrapolated to epoch of observation (~2018.53), and micro-arcsecond positions from the GAIA database where the differences are ~0.05 arcsec in rho and ~0.15 degrees in PA. In addition, we present rectilinear elements for the 10 Sco pairs and orbital elements for two of them. Ephemera are given for these pairs based on both the rectilinear elements and the orbital elements.