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1056 Azalea

Florian asteroid

Field	Value
minorplanet	yes
name	1056 Azalea
background	#D6D6D6
image	1056Azalea (Lightcurve Inversion).png
caption
discovery_ref
discoverer	K. Reinmuth
discovery_site	Heidelberg Obs.
discovered	31 January 1924
mpc_name	(1056) Azalea
alt_names	1924 QD1925 NA
1929 WX
pronounced
named_after	Azalea (flower)
mp_category	main-belt(inner)
Flora
orbit_ref
epoch	4 September 2017 (JD 2458000.5)
uncertainty	0
observation_arc	93.24 yr (34,057 days)
aphelion	2.6277 AU
perihelion	1.8321 AU
semimajor	2.2299 AU
eccentricity	0.1784
period	3.33 yr (1,216 days)
mean_anomaly	226.32°
mean_motion	/ day
inclination	5.4267°
asc_node	104.17°
arg_peri	212.39°
dimensions	km
km
km
12.40 km (calculated)
km
km
rotation	15.0276 h
h
h
albedo
0.24 (assumed)

spectral_type	SMASS SS
abs_magnitude	11.6011.7011.83

1929 WX Flora km km 12.40 km (calculated) km km h h 0.24 (assumed)

1056 Azalea, provisional designation , 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. The asteroid is named after the Azalea flower.

Orbit and classification

Azalea is a member of the Flora family (402), a giant asteroid family and the largest family of stony asteroids in the main belt. 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. The body's observation arc begins at Heidelberg in April 1928, more than 4 years after its official discovery observation.

Physical characteristics

In the SMASS classification, Azalea is a common stony S-type asteroid.

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 (). 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) ().

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.

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.

Naming

This minor planet was named after the genus of flowering shrubs, Azalea, which are rhododendrons with funnel-shaped corollas. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 100).

References

{{OED. azalea

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

flora-asteroids discoveries-by-karl-wilhelm-reinmuth named-minor-planets s-type-asteroids-(smass) astronomical-objects-discovered-in-1924

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