No proper motions are given in this release 2. The TAC 2.0 data are to be used in combination with other astrometric catalogs to get precise, current epoch positions. For proper use of the data, please read the following sections carefully, in particular the remarks section. The first and last 10 lines of the main data file are given below. The columns are explained in the following section.
All entries are positive integer numbers.
The catalog contains 705099 stars on 705099 lines. All TAC ISN are in the range from 1 to 800342. Each star has a unique ISN, however not all ISN in that range are used. There will be no confusion with the numbering in the release 1 TAC, because there a scheme by declination zones was adopted for the catalog data and the nomenclature. The catalog includes single image stars and is sorted by declination.