6365
First observed as a faint telescopic object on September 18 , 1965 , the first calculations of its orbit suggested that on October 21 , it would pass just 450,000 " km above the Sun 's surface , and would probably become extremely bright .
 astronomical object: Sun
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: Sun