Pichi üñëm
| (702) Alauda I (Pichi üñëm) | |
|---|---|
| Provisional or systematic name | S / 2007 (702) 1 |
| Central body | (702) Alauda |
| Properties of the orbit | |
| Major semi-axis | 1227 ± 24 km |
| Periapsis | 1223 km |
| Apoapsis | 1231 km |
| eccentricity | 0.003 ± 0.020 |
| Orbital time | 4.914 ± 0.007 d |
| Physical Properties | |
| Medium diameter | 3.51 ± 0.9 km |
| discovery | |
| Explorer |
|
| Date of discovery | July 26, 2007 |
Pichi üñëm is a moon of the main belt asteroid (702) Alauda .
Discovery and naming
Pichi üñëm was discovered on July 26, 2007 - 97 years after the discovery of the mother asteroid - by the astronomers Patricio Rojo and Jean-Luc Margot at the ESO - 8m-Very Large Telescope on the Cerro Paranal mountain in Chile using adaptive optics . The discovery was published on August 2, 2007; the companion was given the provisional designation S / 2007 (702) 1 .
On October 12, 2011, the moon was officially named Pichi üñëm by the International Astronomical Union (IAU). The name, which translates as "little bird", comes from the Mapudungun language , which is spoken by the Mapuche people in Chile and Argentina .
Track properties
Pichi üñëm orbits Alauda on a prograde , almost perfect circular path between 1,223 and 1,231 km from its center (major orbit half-axis 1,227 km or 12.15 Alauda radii). The eccentricity of the orbit is 0.003, the inclination of the orbit is not yet known.
Pichi üñëm orbits Alauda in 4 days, 21 hours and 56 minutes, which corresponds to about 423.83 orbits in one Alauda year (around 5.7 earth years).
Physical Properties
Pichi üñëm has a diameter of 3.51 km, which corresponds to about 2% of the central body.
exploration
Since Alauda was discovered back in 1910, the orbit of the entire system is now well known. Overall, the system has been observed through various earth-based telescopes, a total of 1621 times within 104 years. (As of Oct. 2014)