9970
The brighter star is spectral class G while the secondary has spectral class M. They are separated by 0.147 AU , and complete an eccentric orbit around a common center of mass every 8 days .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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