Tycho-2 merged with the TDSC catalog and TDSC supplement.The Tycho Double Star Catalogue, (TDSC, ) contains 98482 components of double and multiple systems processed in the Tycho-2 context. It include
Gaia DR3 data were originally released by the European Space Agency in December 2020. This HATS-formatted catalog was produced by the LSST Interdisciplinary Network for Collaboration and Computing. Th
PPMXL Neighbourhood table includes all good neighbours for each matched Gaia object. A good neighbour for a given Gaia object is a nearby object in the external catalogue whose position is compatible
Recently, the first installment of data from ESA’s Gaia astrometric satellite mission (Gaia DR1) was released, containing positions of more than 1 billion stars with unprecedented precision, a