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(15760) 1992 QB1
, also written (15760) 1992 QB1, was the first trans-Neptunian object to be discovered after Pluto and Charon. It was discovered in 1992 by David C. Jewitt and Jane X. Luu at the Mauna Kea Observatory, Hawaii. It is a classical Kuiper belt object and gave rise to the name ''cubewano'' for this kind of object, after the "QB1" portion of its designation. Decoding its provisional designation, "QB1" reveals that it was the 27th object found in the second half of August of that year. Over 1,500 further objects have been found beyond Neptune, a good number of which are classical Kuiper belt objects.
The discoverers suggested the name "Smiley" for ,〔(What Lurks in the Outer Solar System? ) (Science@NASA, 13 September 2001)〕 but the name was already used for an asteroid 1613 Smiley, named after the American astronomer Charles Hugh Smiley. It has received the number 15760〔 and remains unnamed; it is normally referred to simply as "QB1", even though this is technically ambiguous without the year of discovery.
==Notes==
Asteroid provisional designations follow a format, in which the year it was discovered comes first, followed by the half-month it was discovered alphabetically (e.g. A=January 1–15, B=January 16–31 and so on,) and then the order of its discovery alphabetically (skipping the letter I) followed by a number (e.g. 1992 QA, 1992 QB, 1992 QC ... 1992 QY, 1992 QZ, 1992 QA1, 1992 QB1 and so on.) According to this, Q=August 16–31 and B1=25+2=27.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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