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A photometric study of wide visual double stars with significant relative proper motion
Photometric observations and uvby H-beta indices of 142 wide visualdouble stars are presented. Calibrations of the indices are used toderive MK class, color excess, absolute magnitude, effectivetemperature, and distance. The results are used to check candidatesdouble stars for the Hipparcos mission for opticity.
| 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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| Сазвежђа: | Змијоносац |
| Ректацензија: | 18h34m09.06s |
| Deклинација: | +11°22'34.6" |
| Apparent магнитуда: | 8.825 |
| Proper motion RA: | 4.1 |
| Proper motion Dec: | 2.1 |
| B-T magnitude: | 8.915 |
| V-T magnitude: | 8.833 |
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