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Photometry of stars in the uvgr system Photoelectric photometry is presented for over 400 stars using the uvgrsystem of Thuan and Gunn. Stars were selected to cover a wide range ofspectral type, luminosity class, and metallicity. A mean main sequenceis derived along with reddening curves and approximate transformationsto the UBVR system. The calibration of the standard-star sequence issignificantly improved.
 
  |  Four-color observations of early-type stars. Standards and secondary standards. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1973ApJ...179..855P&db_key=AST
 
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Osservazione e dati astrometrici
| Costellazione: | Pegaso |  
    | Ascensione retta: | 22h10m49.24s |  
    | Declinazione: | +13°57'07.7" |  
    | Magnitudine apparente: | 8.835 |  
    
        | Distanza: | 342.466 parsec |  
        
    
    | Moto proprio RA: | 0.9 |  
    | Moto proprio Dec: | -4.9 |  
    | B-T magnitude: | 9.135 |  
    | V-T magnitude: | 8.86 |  
    
 
 
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