Assessment of the accuracy of measures in the 1829 southern double star catalogue of James Dunlop
Article
Article Title | Assessment of the accuracy of measures in the 1829 southern double star catalogue of James Dunlop |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Letchford, Roderick R. (Author), White, Graeme L. (Author) and Brown, Carolyn J. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 510 (4), pp. 5330-5347 |
Number of Pages | 18 |
Year | 2022 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stab3777 |
Web Address (URL) | https://academic.oup.com/mnras/article/510/4/5330/6507584 |
Abstract | In 1829 James Dunlop published the first southern double star catalogue of some 253 double stars. The accuracy of this catalogue has been determined by using Aladin to cross-match them with Gaia DR2 and estimate their positional (right ascension, declination, position angle, and separation) and magnitude accuracy. Seven per cent could not be identified using Aladin and 14 were single stars. We found 13 double stars (5 per cent) not currently listed in the Washington Double Star Catalog. The catalogue equinox was determined as B1826.0. Overall, 1σ uncertainties in right ascension were within 1 sidereal minute and declinations within 10 arcmin. We also identified and corrected a number of Quadrant errors in the position angles and quantified the separations. Apparent visual magnitude estimates were generally within 1 mag. Dunlop's overall uncertainties were larger than those of his contemporaries, nevertheless the little known catalogue remains valuable as the earliest source of over 200 double star astrometric and visual magnitude estimates. |
Keywords | Astrometry; Binaries: Visual; History and philosophy of astronomy; Methods: Analytical |
ANZSRC Field of Research 2020 | 510199. Astronomical sciences not elsewhere classified |
510109. Stellar astronomy and planetary systems | |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society©: [2022] [Roderick R. Letchford, Graeme L. White, Carolyn J. Brown] Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Byline Affiliations | Centre for Astrophysics |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q7x15/assessment-of-the-accuracy-of-measures-in-the-1829-southern-double-star-catalogue-of-james-dunlop
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