75871
It is a semiregular variable star of the Mu Cephei type , whose apparent magnitude varies between 3.3 and 4.0 with periods of 50 , 120 and 250 days .
 Mu Cephei
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Mu Cephei