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   PR # 22005
    We propose to obtain ASCA X-ray coronal spectroscopy of a small      
    sample of single, G0-5 V stars selected as proxies for the Sun at    
    earlier stages of its post-ZAMS lifetime. The stars selected: HD     
    129333, kappa-1 Cet, HN Peg, HD 1835, and beta Com are nearby and    
    well studied at other wavelengths. They have ages and rotation       
    periods ranging from 70 Myr/per.=2.7d to 2 Gyr/per.=12.4d. ASCA      
    observations will reveal details of the evolution of solar coronal   
    temperature and X-ray energy distribution up to 10 keV as the dynamo 
    runs down. They will be supported by UBVRI and IUE observations, and 
    when possible with VLA observations. These observations will permit  
    the most detailed examination of the early Sun's magnetic activity   
   and atmosphere from the photos
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