Table A.1
Positional data of π1 Gru from various catalogues over the past century.
| SAO(1) | AC 2000.2(2) | PPM(3) | YZC(4) | CPC-2(5) | SHCB(6) | ||||||||
|
|
|||||||||||||
| Mean epoch of RA | 1896 | 1903.7 | 1950.9 | 1961.8 | 1962.1 | 1974.6 | |||||||
| Mean epoch of Dec | 1890 | 1903.7 | 1951.0 | 1961.8 | 1962.1 | 1974.6 | |||||||
| μα ∗ (mas yr-1) | 9 ± 11 | – | 38.2 ± 4 | 39 | 38.6 ± 3 | – | |||||||
| μδ (mas yr-1) | −7 ± 8 | – | −17 ± 4 | –22 | −13 ± 3 | – | |||||||
| RA at obs. epoch [°] | 335.682791 | 335.682854 | 335.683458 | 335.683616 | 335.683791 | 335.684319 | |||||||
| Error in RA [10-5°] | 5.833 | 7.056 | 2.5 | – | 1.361 | 6.111 | |||||||
| Dec at obs. epoch [°] | –45.947583 | –45.947530 | –45.947752 | –45.947802 | –45.947802 | –45.947926 | |||||||
| Error in Dec [10-5°] | 5 | 2.694 | 2.5 | – | 1.778 | 5.556 | |||||||
|
|
|||||||||||||
| SPM4(7) | FOCAT-S(8) | Tycho-2(9) | PPMXL(10) | USNO-B(11) | |||||||||
|
|
|||||||||||||
| Mean epoch of RA [yr] | 1983.3 | 1985.3 | 1991.4 | 1991.2 | 2000.0 | ||||||||
| Mean epoch of Dec [yr] | 1983.3 | 1985.3 | 1991.4 | 1991.2 | 2000.0 | ||||||||
| μα ∗ [mas yr-1] | 26.9 ± 4.8 | 32 ± 1 | 33.4 ± 1.1 | 35.3 ± 2 | 32 | ||||||||
| μδ [mas yr-1] | −20.2 ± 4.3 | −12 ± 4 | −17.7 ± 1.2 | −16.3 ± 2 | −18 | ||||||||
| RA at obs. epoch [°] | 335.684025 | 335.684000 | 335.684094 | 335.684177 | 335.684203 | ||||||||
| Error in RA [10-5°] | 1.183 | 5 | 0.111 | 0.056 | – | ||||||||
| Dec at obs. epoch [°] | –45.947895 | –45.947872 | –45.947916 | –45.947915 | –45.947959 | ||||||||
| Error in Dec [10-5°] | 1.025 | 6.667 | 0.111 | 0.056 | – | ||||||||
Notes. All positions are given in the J2000.0 system.
Reference. (1): Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966); (2): The Astrographic Catalogue on the Hipparcos System (Urban et al. 2001); (3): Positions and Proper Motions – South (Bastian & Röser 1993); (4): Yale Zone Catalogues Integrated (Fallon 1983); (5): Cape Photographic Catalogue 2 (Nicholson et al. 1984); (6): Southern Hemisphere Catalogue of Bordeaux (Rousseau et al. 1996); (7): Yale/San Juan Southern Proper Motion Catalog 4 (Girard et al. 2011); (8): Pulkovo photographic Catalogue of Southern Hemisphere (Bystrov et al. 1994); (9): The Tycho-2 Catalogue of the 2.5 Million Brightest Stars (Høg et al. 2000); (10): The PPMXL catalog of positions and proper motions on the ICRS (Roeser et al. 2010); (11): The USNO-B Catalog (Monet et al. 2003).
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