2077
The initial light curve resembled that of a nova , an eruption that occurs when enough hydrogen gas has accumulated on the surface of a white dwarf from its close binary companion .
 astronomical object: nova; astronomical object: white dwarf; astronomical object: binary
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 astronomical object: nova; astronomical object: white dwarf; astronomical object: binary