61550
Subsequent studies have reported an angular diameter ( i.e. , apparent size ) ranging from 0.042 to 0.056 arcseconds ; that range of determinations is ascribed to non-sphericity , limb darkening , pulsations and varying appearance at different wavelengths .
 pulsations
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:
 pulsations