TY - JOUR
T1 - The southern double stars of James Dunlop IV
T2 - Rectilinear and orbital motion of some very slow moving doubles
AU - Letchford, Roderick
AU - White, Graeme
AU - Ernest, Allan
N1 - Includes bibliographical references
PY - 2019/7/1
Y1 - 2019/7/1
N2 - 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%.
AB - 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%.
M3 - Article
SN - 2572-4436
VL - 15
SP - 394
EP - 402
JO - Journal of Double Star Observations
JF - Journal of Double Star Observations
IS - 3
ER -