2003 LA7, also written as 2003 LA7, is a resonant trans-Neptunian object that goes around the Sun once for every four times that Neptune goes around. This means it is in a 1:4 orbital resonance with Neptune. Another example of such object in this resonance is 2011 UP411.

2003 LA7
Discovery
Discovery date2003
Designations
2003 LA7
1:4 resonance[1][2]
Orbital characteristics[3]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc1746 days (4.78 yr)
Aphelion116.44 AU (17.419 Tm) (Q)
Perihelion36.002 AU (5.3858 Tm) (q)
76.220 AU (11.4023 Tm) (a)
Eccentricity0.52765 (e)
665.45 yr (243054 d)
346.07° (M)
0° 0m 5.332s /day (n)
Inclination5.6369° (i)
34.076° (Ω)
271.47° (ω)
Earth MOID34.9906 AU (5.23452 Tm)
Jupiter MOID30.912 AU (4.6244 Tm)
Physical characteristics
Dimensions~231 km (assumed)[4]
0.09 (assumed)
~22.4[5]
6.5[3]
Orbit

The orbit of "fourtino" 2003 LA7 compared to Pluto and Neptune.
1:4 Libration

Neptune is held stationary at 5 o'clock.

2003 LA7 is in a 1:4 resonance with the planet Neptune.[1][2] For every one orbit that a it makes, Neptune orbits 4 times.

It is currently 43 AU from the Sun,[5] and will come to perihelion around 2041.[3]

Assuming a generic TNO albedo of 0.09, it is about 231 km in diameter.[4]

It has been observed 14 times over 4 oppositions.[3]

See also

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References

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  1. ^ a b "MPEC 2009-C70 :Distant Minor Planets (2009 FEB. 28.0 TT)". Minor Planet Center. 10 February 2009. Retrieved 14 March 2009.
  2. ^ a b Marc W. Buie. "Orbit Fit and Astrometric record for 03LA7" (last observation: 2008-03-12 using 17 of 18 observations). SwRI (Space Science Department). Retrieved 13 October 2014.
  3. ^ a b c d "JPL Small-Body Database Browser: (2003 LA7)" (last observation: 2007-04-21). Retrieved 30 March 2016.
  4. ^ a b Wm. Robert Johnston (22 August 2008). "List of Known Trans-Neptunian Objects". Johnston's Archive. Archived from the original on 13 February 2009. Retrieved 14 March 2009.
  5. ^ a b "AstDys 2003LA7 Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 26 May 2011. Retrieved 19 March 2009.
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