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Discovery
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| Discovered by | David C. Jewitt, Jane X. Luu |
| Discovery date | August 30, 1992 |
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Designations
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| Alternate name | none |
| Minor planet category |
Trans-Neptunian object (cubewano)[1] |
| Epoch August 18, 2005 (JD 2453600.5) | |
| Aphelion | 46.5925 AU |
| Perihelion | 40.8754 AU |
| Semi-major axis | 43.7339 AU |
| Eccentricity | 0.0654 |
| Orbital period | 289.225 a |
| Average orbital speed | 4.4990 km/s |
| Mean anomaly | 14.5829° |
| Inclination | 2.1927° |
| Longitude of ascending node | 359.4575° |
| Argument of perihelion | 2.1541° |
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Physical characteristics
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| Dimensions | 160 km[2] |
| Mass | ?×10? kg |
| Mean density | ? g/cm³ |
| Equatorial surface gravity | ? m/s² |
| Escape velocity | ? km/s |
| Rotation period | ? d |
| Albedo | ~0.09 |
| Temperature | ~? K |
| Spectral type | ? |
| Absolute magnitude (H) | 7.2 |
(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 "QB1".
(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,[3] but as there is already an asteroid named 1613 Smiley (named after an American astronomer) the name could not 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 seven other numbered asteroids —(7026) 1993 QB1, (31114) 1997 QB1, (36447) 2000 QB1, (52468) 1995 QB1, (175357) 2005 QB1, (180774) 2004 QB1, and (214558) 2006 QB1— and many unnumbered ones).
The next three official cubewanos are (15807) 1994 GV9, (16684) 1994 JQ1, and (19255) 1994 VK8.[4]
References
- ^ Marc W. Buie (1999-11-30). "Orbit Fit and Astrometric record for 15760". SwRI (Space Science Department). http://www.boulder.swri.edu/~buie/kbo/astrom/15760.html. Retrieved 2008-09-28.
- ^ Wm. Robert Johnston (22 August 2008). "List of Known Trans-Neptunian Objects". Johnston's Archive. http://www.johnstonsarchive.net/astro/tnoslist.html. Retrieved 2008-09-29.
- ^ What Lurks in the Outer Solar System? (Science@NASA, 13 September 2001)
- ^ "MPEC 2008-O05 : Distant Minor Planets (2008 AUG. 2.0 TT)". Minor Planet Center. 2008-07-17. http://cfa-www.harvard.edu/iau/mpec/K08/K08O05.html. Retrieved 2008-09-29.
External links
- Orbital simulation from JPL (Java) / Ephemeris
- The IAU circular announcing the discovery
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