5708
This is an RS Canum Venaticorum variable star with its luminosity varying by 0.033 magnitudes over a period of 18 days .
 RS Canum Venaticorum variable
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:
 RS Canum Venaticorum variable