2003 LA7

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.

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

Discovery
Discovery date	2003
Designations
MPC designation	2003 LA7
Minor planet category	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)
Semi-major axis	76.220 AU (11.4023 Tm) (a)
Eccentricity	0.52765 (e)
Orbital period (sidereal)	665.45 yr (243054 d)
Mean anomaly	346.07° (M)
Mean motion	0° 0m 5.332s /day (n)
Inclination	5.6369° (i)
Longitude of ascending node	34.076° (Ω)
Argument of perihelion	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]
Geometric albedo	0.09 (assumed)
Apparent magnitude	~22.4[5]
Absolute magnitude (H)	6.5[3]

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

• (119979) 2002 WC19 (a twotino)
• (136120) 2003 LG7 ("threetino")