2008 LC 18

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Asteroid
2008 LC 18
Properties of the orbit ( animation )
Orbit type Neptune Trojan (L 5 )
Major semi-axis 30.0  AU
eccentricity 0.082
Perihelion - aphelion 27.5 AU - 32.5 AU
Inclination of the orbit plane 27.53 °
Sidereal period 164.38 a
Physical Properties
Medium diameter approx. 100 km
Absolute brightness 8.4 mag
history
Explorer Scott S. Sheppard
Chad Trujillo
Date of discovery June 7, 2008
Another name MPO181243
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items.

2008 LC 18 is a Neptune Trojan that was discovered on June 7, 2008 by Scott S. Sheppard and Chad Trujillo using the Subaru telescope .

It was the seventh such object that was discovered, and at the same time the first that was found in the region of the subsequent Lagrangian point L 5 , 60 ° behind Neptune . It has the same orbital period as Neptune.

It has a slope of 27.5 °. This is the second highest orbit inclination of all known Neptune Trojans (as of August 2010).

With an absolute brightness of 8 M , 4 it has an estimated diameter of about 100 km.

The discovery of Neptune's L 5 Trojans is made difficult by the fact that they are located in a region of space that is on a line of sight to the center of our Milky Way, an area of ​​the sky that is heavily populated by stars. 2008 LC 18 was found in an area where the background stars are obscured by a cloud of dust . The discovery of a Neptune L 5 trojan in an examined area of ​​19 square degrees suggests that there are 150 Neptune L 5 trojans larger than about 80 km (24th magnitude) in diameter, similar to the estimate of such objects in Neptune L 4 swarm.

2008 LC 18 won't be close enough for investigation by the New Horizons probe when it crosses Neptune's L 5 region en route to Pluto 2013–2014, but its discovery suggests that other, better located Neptune Trojans may be found by then could become. 2008 LC 18 crossed the plane of the ecliptic in 2011 .

See also

Web links

Individual evidence

  1. ↑ a b c d e Scott S. Sheppard , Trujillo, Chadwick A .: Detection of a Trailing (L5) Neptune Trojan . In: AAAS (Ed.): Science . 329, No. 5997, September 10, 2010, p. 1304. doi : 10.1126 / science.1189666 . PMID 20705814 . Retrieved September 22, 2010.
  2. ↑ a b c List Of Neptune Trojans . Minor Planet Center. Retrieved May 8, 2008.
  3. ↑ a b JPL Small-Body Database Browser: 2008 LC18 . Retrieved August 13, 2010.
  4. ↑ Emily Lakdawalla: 2008 LC15, the first Trojan asteroid discovered in Neptune's L5 point . In: Planetary Society web log . The Planetary Society . August 13, 2010. Retrieved August 14, 2010.
  5. ↑ Reaching the Mid-Mission Milestone on the Way to Pluto! . New Horizons: The PI's Perspective. October 18, 2010. Retrieved January 27, 2016.