702 Alauda
{{Use dmy dates|date=June 2017}}
{{Infobox planet
| minorplanet = yes
| name = 702 Alauda
| background = #D6D6D6
| image = 702Ala-mag13-occult.jpg
| image_scale =
| caption = 702 Alauda as seen an hour after occulting TYC 1920-00620-1
| discoverer = J. Helffrich
| discovery_site = Heidelberg Obs.
| discovered = 1910
| mpc_name = (702) Alauda
| pronounced = {{IPAc-en|ə|ˈ|l|ɔː|d|ə}}{{MW|Alauda}}'Alaude' in Noah Webster (1884) A Practical Dictionary of the English Language
| adjective = Alaudian
| named_after = {{nowrap|Alauda {{small|(genus of Birds)}}}}
| alt_names = 1910 KQ
| mp_category = main-belt{{·}}{{small|(outer)}}
Alauda
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 106.89 yr (39,040 days)
| aphelion = 3.2533 AU
| perihelion = 3.1372 AU
| semimajor = 3.1953 AU
| eccentricity = 0.0182
| period = 5.71 yr (2,086 days)
| mean_anomaly = 311.58°
| mean_motion = {{Deg2DMS|0.1726|sup=ms}} / day
| inclination = 20.589°
| asc_node = 289.77°
| arg_peri = 349.49°
| dimensions = {{val|163.98|57.99}} km
{{val|172.29|55.38}} km
{{val|175}} km
{{val|190.58|2.65}} km
{{val|190.980|1.973}} km
{{val|194.73|3.2}} km
{{val|201.961|4.642}} km
{{val|202|20}} km
| mass = {{val|6.057|0.36|e=18|ul=kg}}
| density = {{val|1.57|0.5|u=g/cm3}}
| albedo = {{val|0.0587|0.002}}
| rotation = {{Convert|8.3531|h|d|abbr=on|lk=on}}
| spectral_type = C ({{small|Tholen}})
B ({{small|SMASSII}})
| magnitude = 11.42 to 13.57Magnitudes generated with JPL Horizons for the year 1950 through 2100
}}
702 Alauda {{IPAc-en|ə|ˈ|l|ɔː|d|ə}}, provisional designation {{mp|1910 KQ}}, is a carbonaceous asteroid and binary system from the outer asteroid belt, approximately 190 kilometers in diameter. 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). Its small moon, named Pichi üñëm, was discovered in 2007.
Satellite
Alauda's satellite Pichi üñëm, provisionally known as {{mp|S/2007 (702) 1}}, 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 {{val|1226.5|24|u=km}}. Pichi üñëm takes 4.91 days to complete one orbit.{{cite web
|title=Asteroid and Dwarf Planet News
|url=http://www.britastro.org/asteroids/Asteroid%20news.htm
|access-date=2009-10-06}}
It was named Pichi üñëm ({{IPA|arn|ˈpɪtʃi ɨˈɲɘm|lang}}, approximately {{IPAc-en|'|p|I|tS|i|_|ᵻ|'|n|j|ʌ|m}}), meaning "little bird" in the Mapuche language of Chile, the country from which the moon was discovered.{{cite web|url= https://www.minorplanetcenter.net/iau/ECS/MPCArchive/2011/MPC_20111012.pdf |title=New Names of Minor Planets }} {{small|(2.19 MB)}}
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.{{rp|23}} 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 {{val|6.057|0.36|e=18|u=kg}} and its density to be {{val|1.57|0.5|u=g/cm3}}.
= 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
|title= Observed asteroidal occultation list
|author= David Dunham
|url=http://mpocc.astro.cz/world/mpocc1.txt
|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
|title = (702) Alauda / TYC 1920-00620-1 event on 2009 Oct 17, 08:18 UT
|publisher = Asteroid Occultation Updates
|author = Steve Preston
|url = http://www.asteroidoccultation.com/2009_10/1017_702_18049_Summary.txt
|access-date = 2009-10-05
}}{{dead link|date=January 2018 |bot=InternetArchiveBot |fix-attempted=yes }} This event should have been visible from Uruguay, Argentina, and Chile.
References
{{reflist|refs=
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|title = 702 Alauda (1910 KQ)
|work = Minor Planet Center
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|access-date = 6 November 2017}}
|first1 = Robert |last1 = Johnston
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|title = Asteroid 702 Alauda – Nesvorny HCM Asteroid Families V3.0
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|date=2007-08-02
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|archive-date = 7 February 2012
|url-status = dead
|df = dmy-all
}}
|title = LCDB Data for (702) Alauda
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=702%7CAlauda
|access-date = 6 November 2017}}
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}}
External links
- [http://www.johnstonsarchive.net/astro/asteroidmoons.html Asteroids with Satellites], Robert Johnston, johnstonsarchive.net
- {{AstDys|702}}
- {{JPL small body}}
{{Minor planets navigator |701 Oriola |number=702 |703 Noëmi}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:Alauda}}