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HD 172290


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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:18h39m02.36s
Declination:+09°51'48.7"
Apparent magnitude:9.252
Proper motion RA:7.5
Proper motion Dec:-0.5
B-T magnitude:9.559
V-T magnitude:9.278

Catalogs and designations:
Proper Names
HD 1989HD 172290
TYCHO-2 2000TYC 1029-3428-1
USNO-A2.0USNO-A2 0975-12503346
HIPHIP 91447

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