2007 VL305

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2007 VL305
Discovery [1][2]
Discovery site Apache Point Obs.
Discovery date 4 November 2007
(discovery: first observation only)
Designations
MPC designation 2007 VL305
Neptune trojan · L4[3]
centaur[1] · distant[2]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 4
Observation arc 5.19 yr (1,894 days)
Aphelion 31.729 AU
Perihelion 28.122 AU
29.926 AU
Eccentricity 0.0603
163.71 yr (59,795 days)
10.760°
0° 0m 21.6s / day
Inclination 28.155°
188.69°
216.70°
Physical characteristics
Dimensions 110 km (est. at 0.10)[4]
160 km[5]
22.2[5]
7.9[1]

2007 VL305 is an inclined Neptune trojan that shares Neptune's orbit in the L4 Lagrangian point. It was first observed on 4 November 2007, by astronomers at the Apache Point Observatory in New Mexico, United State, although images from 2005 have also been recovered.[2] It measures approximately 160 kilometers in diameter and was the sixth Neptune trojan to be discovered.[3] As of 2016, it is 34.1 AU from Neptune.[6]

Orbit and classification[edit]

Neptune trojans can be considered resonant trans-Neptunian objects in a 1:1 mean-motion orbital resonance with Neptune. These trojans have a semi-major axis and an orbital period very similar to Neptune's (30.10 AU; 164.8 years).

2007 VL305 belongs to the leading L4 group, which orbits 60° ahead of Neptune's orbit. It orbits the Sun with a semi-major axis of 29.926 AU at a distance of 28.1–31.7 AU once every 163 years and 9 months (59,795 days). Its orbit has an eccentricity of 0.06 and an inclination of 28° with respect to the ecliptic.[1] Its inclination is almost as high as that of 2011 HM102.[3]

Physical characteristics[edit]

Diameter[edit]

The discoverers estimate that 2007 VL305 has a mean-diameter of 160 kilometers based on a magnitude of 22.2.[5] Based on a generic magnitude-to-diameter conversion, it measures approximately 110 kilometers in diameter using an absolute magnitude of 7.9 with an assumed albedo of 0.10.[4]

Numbering and naming[edit]

Due to its orbital uncertainty, this minor planet has not been numbered and its official discoverers have not been determined.[1][2] If named, it will follow the naming scheme already established with 385571 Otrera, which is to name these objects after figures related to the Amazons, an all-female warrior tribe that fought in the Trojan War on the side of the Trojans against the Greek.[citation needed]

References[edit]

  1. ^ a b c d e f "JPL Small-Body Database Browser: (2007 VL305)" (2011-01-10 last obs.). Jet Propulsion Laboratory. Retrieved 5 August 2017. 
  2. ^ a b c d "2007 VL305". Minor Planet Center. Retrieved 5 August 2017. 
  3. ^ a b c "List Of Neptune Trojans". Minor Planet Center. 10 July 2017. Retrieved 5 August 2017. 
  4. ^ a b "Asteroid Size Estimator". CNEOS/JPL. Retrieved 5 August 2017. 
  5. ^ a b c Lakdawalla, Emily (13 August 2010). "2008 LC15, the first Trojan asteroid discovered in Neptune's L5 point". The Planetary Society. Retrieved 5 August 2017. 
  6. ^ 2007 VL305 at JPL Horizons Change "Observer Location" to @Neptune

External links[edit]