2003 LA7
| Discovery | |
|---|---|
| Discovery date | 2003 |
| Designations | |
| 2003 LA7 | |
| 1:4 resonance[1][2] | |
| Orbital characteristics[3] | |
| Epoch 21 November 2025 (JD 2461000.5) | |
| Uncertainty parameter 3 | |
| Observation arc | 3277 days (8.97 yr) |
| Aphelion | 115.01 AU (17.205 Tm) (Q) |
| Perihelion | 35.896 AU (5.3700 Tm) (q) |
| 75.451 AU (11.2873 Tm) (a) | |
| Eccentricity | 0.52425 (e) |
| 655.40 yr (239387 d) | |
| 351.12° (M) | |
| 0° 0m 5.414s /day (n) | |
| Inclination | 5.6452° (i) |
| 34.174° (Ω) | |
| 272.03° (ω) | |
| Earth MOID | 34.8845 AU (5.21865 Tm) |
| Jupiter MOID | 30.8067 AU (4.60862 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.
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 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 26 times over 4 oppositions.[3]
See also
- (119979) 2002 WC19 (a twotino)
- (136120) 2003 LG7 ("threetino")
References
- ^ a b "MPEC 2009-C70 :Distant Minor Planets (2009 FEB. 28.0 TT)". Minor Planet Center. 10 February 2009. Retrieved 14 March 2009.
- ^ 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.
- ^ a b c d "JPL Small-Body Database Browser: (2003 LA7)" (last observation: 2007-04-21). Retrieved 30 March 2016.
- ^ 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.
- ^ a b "AstDys 2003LA7 Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 26 May 2011. Retrieved 19 March 2009.
External links
- 2003 LA7 at AstDyS-2, Asteroids—Dynamic Site
- 2003 LA7 at the JPL Small-Body Database
