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New optical positions and proper motions of late type stars associated with SiO masers
The 33 cm astrograph of the Bordeaux Observatory has been used to derivewith respect to AGK3 reference stars, accurate positions of late typevariable stars variable stars associated with strong SiO maser emission.It is suggested that selected maser stars can be used to link theHIPPARCOS system and the VLBI extragalactic reference frame. The propermotions of the program (SiO) and reference stars are derived and, forthe program stars, are compared to the McCormick catalog of propermotions.
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Observation and Astrometry data
| Constellation: | Οφιούχος |
| Right ascension: | 18h34m21.90s |
| Declination: | +10°29'57.4" |
| Apparent magnitude: | 9.214 |
| Proper motion RA: | -0.4 |
| Proper motion Dec: | -0.6 |
| B-T magnitude: | 9.499 |
| V-T magnitude: | 9.238 |
Catalogs and designations:
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