702 Alauda

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702 Alauda Template:IPAc-en, provisional designation Template:Mp, is a carbonaceous asteroid and binary system from the outer asteroid belt, approximately 190 kilometers in diameter.[1] It is the parent body of the Alauda family. Discovered in 1910 by German astronomer Joseph Helffrich at Heidelberg Observatory, it was named after the lark (alauda).[2][3] Its small moon, named Pichi üñëm, was discovered in 2007.[4][5]

Satellite

Alauda's satellite Pichi üñëm, provisionally known as Template:Mp, 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.[4] 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 Script error: No such module "val".. Pichi üñëm takes 4.91 days to complete one orbit.[6][5][7] It was named Pichi üñëm (Script error: No such module "IPA"., approximately Template:IPAc-en), meaning "little bird" in the Mapuche language of Chile, the country from which the moon was discovered.[8]

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.[9]Template:Rp 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.[10] Alauda's moon may be a result of the collision that created the asteroid family.[4]

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 Script error: No such module "val". and its density to be Script error: No such module "val"..[6]

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.[11] It may have occulted an apparent magnitude 9.5 star in the constellation of Gemini on 2009-10-17 at 08:18 UT.[12] This event should have been visible from Uruguay, Argentina, and Chile.[12]

References

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  11. ↑ Script error: No such module "citation/CS1".
  12. ↑ a b Script error: No such module "citation/CS1".Script error: No such module "Unsubst".

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External links

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