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Submit a new article| Stars with the Largest Hipparcos Photometric Amplitudes A list of the 2027 stars that have the largest photometric amplitudes inHipparcos Photometry shows that most variable stars are all Miras. Thepercentage of variable types change as a function of amplitude. Thiscompilation should also be of value to photometrists looking forrelatively unstudied, but large amplitude stars.
 
 
 |  | Interstellar reddening in the Southern Hemisphere. I - The UVBY beta observations The uvby-beta photometric data obtained from a Southern Hemisphereobservational project is presented. A uvby-beta photometric network ofnearly 3900 A and early F stars has been established with the intentthat the stars serve as 'space probes' for measurements of interstellarreddening.
 
 
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 Observation and Astrometry data
| Constellation: | Tucana |  | Right ascension: | 22h43m40.47s |  | Declination: | -64°38'53.4" |  | Apparent magnitude: | 8.777 |  | Distance: | 174.52 parsecs |  | Proper motion RA: | 17.7 |  | Proper motion Dec: | -3.1 |  | B-T magnitude: | 9.223 |  | V-T magnitude: | 8.814 |  Catalogs and designations:
 
 
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