The Southern Double Stars of James Dunlop IV: Rectilinear and Orbital Motion of Some Very Slow Moving Doubles
Abstract
We present rectilinear and orbital elements and their plots of some very slow moving doubles from the first published dedicated catalogue of southern double stars. Of the 12 Dunlop doubles analysed, DUN 4*, 42*, 138*, 251 probably are not binaries; DUN 38*, 52*, 111*, 116*, 168, 230, 246 have uncertain but possible binarity; and only DUN 5* is a confirmed binary. The orbital parameters for DUN 52*, 230 and 246 we consider to be grade 5. Of those grade 5 orbits, curvature was detected in the historical data for DUN 230, with a probability of binarity of 50.5%.
- Publication:
-
Journal of Double Star Observations
- Pub Date:
- July 2019
- Bibcode:
- 2019JDSO...15..394L