2003 LA7

2003 LA7
Discovery
Discovery date 2003
Designations
MPC designation 2003 LA7
1:4 resonance[1][2]
Orbital characteristics[3]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc 1746 days (4.78 yr)
Aphelion 116.44 AU (17.419 Tm) (Q)
Perihelion 36.002 AU (5.3858 Tm) (q)
76.220 AU (11.4023 Tm) (a)
Eccentricity 0.52765 (e)
665.45 yr (243054 d)
346.07° (M)
0° 0m 5.332s /day (n)
Inclination 5.6369° (i)
34.076° (Ω)
271.47° (ω)
Earth MOID 34.9906 AU (5.23452 Tm)
Jupiter MOID 30.912 AU (4.6244 Tm)
Physical characteristics
Dimensions ~231 km (assumed)[4]
0.09 (assumed)
~22.4[5]
6.5[3]

    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. Another possible fourtino is 2011 UP411.

    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

    References

    1. 1 2 "MPEC 2009-C70 :Distant Minor Planets (2009 FEB. 28.0 TT)". Minor Planet Center. 2009-02-10. Retrieved 2009-03-14.
    2. 1 2 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 2014-10-13.
    3. 1 2 3 4 "JPL Small-Body Database Browser: (2003 LA7)" (last observation: 2007-04-21). Retrieved 30 March 2016.
    4. 1 2 Wm. Robert Johnston (22 August 2008). "List of Known Trans-Neptunian Objects". Johnston's Archive. Archived from the original on 13 February 2009. Retrieved 2009-03-14.
    5. 1 2 "AstDys 2003LA7 Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 2009-05-14. Retrieved 2009-03-19.

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