730 Athanasia
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730 Athanasia (prov. designation: Template:Mp or Template:Mp) is a background asteroid from the inner regions of the asteroid belt, approximately Script error: No such module "convert". in diameter. It was discovered by Austrian astronomer Johann Palisa at the Vienna Observatory on 10 April 1912.[1] The presumed stony S-type asteroid has a rotation period of 5.7 hours and is likely very elongated in shape. It was named Athanasia, the Greek word for "immortality".[2]
Orbit and classification
Located in the region of the Flora family (402Script error: No such module "Check for unknown parameters".),[3] a giant asteroid family and the largest family of stony asteroids in the main-belt, Athanasia is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[4][5][6] It orbits the Sun in the inner asteroid belt at a distance of 1.8–2.6 AU once every 3 years and 4 months (1,228 days; semi-major axis of 2.24 AU). Its orbit has an eccentricity of 0.18 and an inclination of 4° with respect to the ecliptic.[7] The body's observation arc begins at Vienna Observatory on 15 April 1912, or five nights after its official discovery observation.[1]
Naming
This minor planet was named by friends of the discoverer after the Greek word for immortality, "athanasia". Any reference to a person or occurrence is unknown. The Template:MoMP was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 73Script error: No such module "Check for unknown parameters".).[2]
Physical characteristics
Athanasia is an assumed, stony S-type asteroid.[3]
Rotation period
In February 2016, a rotational lightcurve of Athanasia was obtained from photometric observations by Frederick Pilcher at the Organ Mesa Observatory Template:Obscode in New Mexico, United States. Analysis gave a classically shaped, well-defined bimodal lightcurve with a rotation period of Script error: No such module "val". hours and a very high brightness variation of Script error: No such module "val". magnitude, indicative of a highly elongated shape (U=3Script error: No such module "Check for unknown parameters".).[8]Template:Efn In May 2013, Pilcher already observed the object and reported an ambiguous period of Script error: No such module "val". or Script error: No such module "val". hours with an amplitude of Script error: No such module "val". magnitude (U=2+Script error: No such module "Check for unknown parameters".).[9]Template:Efn
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Athanasia measures (Script error: No such module "val".) kilometers in diameter and its surface has a high albedo of (Script error: No such module "val".).[10] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a Florian asteroid of 0.24 and calculates a diameter of 4.94 kilometers based on an absolute magnitude of 13.7.[3]
Notes
References
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External links
- Lightcurve Database Query (LCDB), at www.minorplanet.info
- Dictionary of Minor Planet Names, Google books
- 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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