(278361) 2007 JJ43
Template: Infobox Asteroid / Maintenance / Error 2
(278361) 2007 JJ43 is a great transneptunisches object in the Kuiper Belt, which is classified as Cubewano. Due to its size, the asteroid is a dwarf planet candidate.
- 3.1 size
- 3.2 Surface
Discovery and designation
(278361) 2007 JJ43 was discovered on 14 May 2007 by a team of astronomers from the California Institute of Technology in Pasadena by Michael E. Brown at the Palomar Observatory. The discovery was announced on July 5, 2007. The asteroid was on 24 June 2011 by the IAU, the official numbering 278361 and was identified retrospectively on older photos to the year 2002.
Web properties
Orbit
2007 JJ43 orbits the sun on a prograde, slightly elliptical orbit between 6.02987 billion km ( 40.307 AU) and 8.264878 billion km ( 55.247 AU) distance from its center. The orbital eccentricity is 0.156, the orbit is tilted 12.082 degrees to the ecliptic.
The orbital period of 2007 JJ43 is 330.25 years or 120,622 days, 19 hours, 34.8 minutes.
Currently, the asteroid 41.5 AU from the Sun ( 2012).
Physical Properties
Size
Currently, one starts with a diameter of 694 km, which the asteroid have comparable Ixion size. This value is based on an assumed albedo of 12 % and an absolute brightness of 3.9 mag. The diameter should be in this case between 600 and 800 km. Since so far no moon was found in 2007 JJ43, the mass can not be calculated directly. According to Mike Brown exists according to observations by the Keck Observatory not a big moon, the asteroid could, however, still have a - or several - small feature.
Surface
About the surface condition is not known, but heard JJ43 2007 to the 20 brightest TNO 's ( Apparent magnitude 20.8 mag), but this is probably more due to the size as a particularly bright surface.
Dwarf planet candidate
Since it is assumed that in 2007 JJ43 is located and must therefore be largely around due to its size in hydrostatic equilibrium, he would have the criteria for classification as a dwarf planet meet. Mike Brown believes that it is most likely a dwarf planet in 2007 JJ43.
Research
After its discovery in 2007 JJ43 could date back to photos up to 2002 and calculate its orbit. Since then, the asteroid was observed by different telescopes, so far a total of 104 times. (As of Sept. 2012 )