(15760) 1992 QB1
(15760) 1992 QB1 <tr><th style="background-color: #FFFFC0" colspan="2" align="center">Discovery </td></tr><tr><th>Discovered by:</th> <td>David C. Jewitt,
Jane X. Luu</td></tr><tr><th>Discovery date:</th> <td>August 30, 1992</td></tr><tr><th>Alternative names:</th><td>none</td></tr><tr><th>Minor planet category:</th> <td>Trans-Neptunian object</br>(cubewano)</td></tr>
Orbital characteristics

<tr> <td align="center" colspan="2"> Epoch August 18, 2005 (JD 2453600.5)</td></tr><tr><th>Aphelion distance:</th> <td>46.5925 AU</td></tr><tr><th>Perihelion distance:</th> <td>40.8754 AU</td></tr><tr><th>Semi-major axis:</th> <td>43.7339 AU</td></tr><tr><th>Eccentricity:</th> <td>0.0654</td></tr><tr><th>Orbital period:</th> <td>289.225 a</td></tr><tr><th>Avg. orbital speed:</th> <td>4.4990 km/s</td></tr><tr><th>Mean anomaly:</th> <td>14.5829°</td></tr><tr><th>Inclination:</th> <td>2.1927°</td></tr><tr><th>Longitude of ascending node:</th> <td>359.4575°</td></tr><tr><th>Argument of perihelion:</th> <td>2.1541°</td></tr><tr><th style="background-color: #FFFFC0" colspan="2" align="center">Physical characteristics</td></tr><tr><th>Dimensions:</th> <td>160 km[1]</td></tr><tr><th>Mass:</th> <td>?×10? kg</td></tr><tr><th>Mean density:</th> <td>? g/cm³</td></tr><tr><th>Equatorial surface gravity:</th> <td>? m/s²</td></tr><tr><th> Escape velocity:</th> <td>? km/s</td></tr><tr><th>Rotation period:</th> <td>? d</td></tr><tr><th>Albedo:</th> <td>~ .07</td></tr><tr><th>Temperature:</th> <td>~? K</td></tr><tr><th>Spectral type:</th> <td>?</td></tr><tr><th>Absolute magnitude:</th> <td>7.2</td></tr>

(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 and is now classified as a cubewano, an object in the main Kuiper Belt. The term cubewano derives from "Q B one oh".

(15760) 1992 QB1 was discovered by David C. Jewitt and Jane X. Luu at the Mauna Kea Observatory, Hawaii. The discoverers suggested the name "Smiley" for the object [1], but as there is already an asteroid named 1613 Smiley (named after an American astronomer) the name couldn't be used. The asteroid has received the number 15760, and remains unnamed; it is normally referred to simply as "QB1" (this is ambiguous, as it could refer to any of five other numbered asteroids —(5322) 1986 QB1, (7026) 1993 QB1, (31114) 1997 QB1, (36447) 2000 QB1, and (52468) 1995 QB1— and a great number of unnumbered ones).



External links

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For a complete listing, see: List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.

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