1056 Azalea
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1056 Azalea, provisional designation Template:Mp, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 12 kilometers in diameter. It was discovered on 31 January 1924, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany.[1] The asteroid is named after the Azalea flower.[2]
Orbit and classification
Azalea is a member of the Flora family (402Script error: No such module "Check for unknown parameters".), a giant asteroid family and the largest family of stony asteroids in the main belt.[3][4][5]Template:Rp It orbits the Sun in the inner main belt at a distance of 1.8–2.6 AU once every 3 years and 4 months (1,216 days). Its orbit has an eccentricity of 0.18 and an inclination of 5° with respect to the ecliptic.[6] The body's observation arc begins at Heidelberg in April 1928, more than 4 years after its official discovery observation.[1]
Physical characteristics
In the SMASS classification, Azalea is a common stony S-type asteroid.[6]
Rotation period
In 2004, two rotational lightcurves of Azalea were obtained from photometric observations by a group of predominately Polish astronomers including Agnieszka Kryszczyńska, as well as by astronomers Alain Klotz and Raoul Behrend. Lightcurve analysis gave a rotation period of 15.03 and 15.15 hours with a high brightness variation of 0.70 and 0.79 magnitude, respectively (U=2/2Script error: No such module "Check for unknown parameters".).[7][8] The high brightness amplitude is typically indicative for a non-spheroidal shape.
Spin axis
In 2013, an international study modeled a lightcurve with a concurring period of 15.0276 hours and found two spin axis of (252.0°, 51.0°) and (64.0°, 41.0°) in ecliptic coordinates (λ, β) (U=n.a.Script error: No such module "Check for unknown parameters".).[9]
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Azalea measures between 10.66 and 13.07 kilometers in diameter and its surface has an albedo between 0.223 and 0.34.[10][11][12][13][14]
The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of the Flora family – and calculates a diameter of 12.40 kilometers based on an absolute magnitude of 11.7.[3]
Naming
This minor planet was named after the genus of flowering shrubs, Azalea, which are rhododendrons with funnel-shaped corollas.[2] The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 100Script error: No such module "Check for unknown parameters".).[2]
References
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- ↑ Script error: No such module "Citation/CS1". (online, AcuA catalog p. 153)
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External links
- Asteroid Lightcurve Database (LCDB), query form (info Template:Webarchive)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- Template:AstDys
- Template:PAGENAMEBASE at the JPL Small-Body DatabaseTemplate:EditAtWikidata
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