2008 LC18

2008 LC₁₈
Discovery
Discovered by	S. S. Sheppard; C. Trujillo;
Discovery site	Mauna Kea Obs.
Discovery date	7 June 2008
Designations
MPC designation	2008 LC18
Minor planet category	Neptune trojan; L5; centaur; distant;
Orbital characteristics
	Epoch 4 September 2017 (JD 2458000.5)
	Uncertainty parameter 5
Observation arc	4.12 yr (1,506 days)
Aphelion	32.445 AU
Perihelion	27.667 AU
Semi-major axis	30.056 AU
Eccentricity	0.0795
Orbital period (sidereal)	164.78 yr (60,186 days)
Mean anomaly	185.24°
Mean motion	0° 0m 21.6s / day
Inclination	27.496°
Longitude of ascending node	88.493°
Argument of perihelion	6.7420°
Physical characteristics
Dimensions	98 km (est. at 0.10); 100 km;
Apparent magnitude	23.2
Absolute magnitude (H)	8.2

2008 LC₁₈ is a Neptune trojan first observed on 7 June 2008 by American astronomers Scott Sheppard and Chad Trujillo using the Subaru Telescope at Mauna Kea Observatories on Hawaii, United States.^[6] It was the first object found in Neptune's trailing L₅ Lagrangian point and measures approximately 100 kilometers in diameter.^[5]

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^ ^a ^b Cite error: The named reference MPC-2008LC18 was invoked but never defined (see the help page).
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^ ^a ^b ^c Cite error: The named reference Sheppard-2010 was invoked but never defined (see the help page).

Discovery^[1]^[2]
Discovered by	S. S. Sheppard C. Trujillo
Discovery site	Mauna Kea Obs.
Discovery date	7 June 2008
Designations
MPC designation	2008 LC₁₈
Minor planet category	Neptune trojan L₅^[3] centaur^[1] distant^[2]
Orbital characteristics^[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 5
Observation arc	4.12 yr (1,506 days)
Aphelion	32.445 AU
Perihelion	27.667 AU
Semi-major axis	30.056 AU
Eccentricity	0.0795
Orbital period (sidereal)	164.78 yr (60,186 days)
Mean anomaly	185.24°
Mean motion	0° 0^m 21.6^s / day
Inclination	27.496°
Longitude of ascending node	88.493°
Argument of perihelion	6.7420°
Physical characteristics
Dimensions	98 km (est. at 0.10)^[4] 100 km^[5]^[6]
Apparent magnitude	23.2^[5]^[6]
Absolute magnitude (H)	8.2^[1]