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Interstellar extinction in the direction of the Merope dark cloud in Pleiades The dependence of interstellar extinction on distance in the directionof the dark cloud south of Merope is determined using photoelectricphotometry of 93 stars in the Vilnius photometric system. The cloudfront edge is detected at 120-130 pc from the sun, and the distance ofthe Pleiades cluster is found to be 127 pc. Mean extinction, A(V), inthe Merope cloud is of the order of 1.0 mag. There is no evidence ofextinction at distances exceeding the Merope cloud distance. Thevariable extinction method yields R = A(V)/E(B-V) = 3.6, while themaximum polarization wavelength method gives the value 3.4. SomePleiades stars are suspected to be unresolved binaries.
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Observation and Astrometry data
Constellation: | Taurus |
Right ascension: | 03h45m13.98s |
Declination: | +23°07'22.5" |
Apparent magnitude: | 9.8 |
Proper motion RA: | 71.7 |
Proper motion Dec: | -79.7 |
B-T magnitude: | 10.605 |
V-T magnitude: | 9.867 |
Catalogs and designations:
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