702 Alauda

Satellite

Alauda's satellite Pichi üñëm, provisionally known as , was discovered on 26 July 2007 from observations using adaptive-optics imaging with the European Southern Observatory (ESO) 8-m Very Large Telescope (VLT) on Cerro Paranal, Chile. It is about 3.5 km in diameter (assuming it has the same albedo as the primary) and orbits Alauda in a nearly circular orbit at a distance of . Pichi üñëm takes 4.91 days to complete one orbit.{{cite web |access-date=2009-10-06}} It was named Pichi üñëm (, approximately ), meaning "little bird" in the Mapuche language of Chile, the country from which the moon was discovered.

Orbital characteristics

Alauda has been identified as the largest member of the Alauda family, a dynamical family of bright carbonaceous asteroids with more than a thousand known members. Other members of this family include: 581 Tauntonia, 1101 Clematis, 1838 Ursa, 3139 Shantou, 3325 TARDIS, 4368 Pillmore, 5360 Rozhdestvenskij, 5815 Shinsengumi, and many others. Alauda's moon may be a result of the collision that created the asteroid family.

Physical characteristics

The discovery and tracking of Alauda's moon enabled Alauda's mass to be determined. The discoverers of the moon, Patricio Rojo and Jean-Luc Margot, estimated Alauda's mass to be and its density to be .

Occultations

Alauda has been observed to occult stars on several occasions, providing important information on its size and shape. It produced occultations on 2001-07-12 and 2004-04-21.{{cite web |access-date=2011-01-27}} It may have occulted an apparent magnitude 9.5 star in the constellation of Gemini on 2009-10-17 at 08:18 UT.{{cite web |access-date = 2009-10-05

References

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References

1. {{MW. Alauda
2. 'Alaude' in Noah Webster (1884) ''A Practical Dictionary of the English Language''
3. Magnitudes generated with JPL Horizons for the year 1950 through 2100
4. "New Names of Minor Planets }} {{small".