2003 LA7

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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 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 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 .

    Contents

    Orbit
    TNO-2003LA7-orbit.gif
    The orbit of "fourtino" 2003 LA7 compared to Pluto and Neptune.
    1:4 Libration
    TNO-2003LA7-50000y.gif
    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 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. 10 February 2009. Retrieved 14 March 2009.
    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 13 October 2014.
    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 14 March 2009.
    5. 1 2 "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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