5208 Royer
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5208 Royer (prov. designation: Template:Mp) is a stony Marian asteroid from the central regions of the asteroid belt, approximately Script error: No such module "convert". in diameter. It was discovered on 6 February 1989, by astronomer Eleanor Helin at the Palomar Observatory. The S-type asteroid has a rotation period of 3.87 hours and was named after American priest and amateur astronomer, Ronald Royer.[1][2]
Orbit and classification
Royer is a member of the Maria family (506Script error: No such module "Check for unknown parameters".),[3] a large family of stony asteroids with nearly 3,000 known members.[4]Template:Rp
It orbits the Sun in the central asteroid belt at a distance of 2.5–2.7 AU once every 4 years and 2 months (1,535 days; semi-major axis of 2.6 AU). Its orbit has an eccentricity of 0.05 and an inclination of 16° with respect to the ecliptic.[5] The body's observation arc begins with a precovery taken at Palomar Observatory in November 1953, more than 35 years prior to its official discovery observation.[1]
Naming
This minor planet was named after Reverend Ronald E. Royer, an American priest as well as amateur astronomer and astrophotographer.[1] He has been a member of the Los Angeles Astronomical Society (LAAS) since 1946 and received the G. Bruce Blair Award in 2001.[6] The official naming citation was published by the Minor Planet Center on 6 April 1993 (M.P.C. 21957Script error: No such module "Check for unknown parameters".).[7]
Physical characteristics
In the SMASS classification, Royer is a common, stony S-type asteroid.[5][2]
Rotation period and poles
In 2004, a rotational lightcurve of Royer was obtained from photometric observations by Brazilian and Argentine astronomers. Lightcurve analysis gave a rotation period of 3.866 hours with a brightness amplitude of 0.44 magnitude (U=2Script error: No such module "Check for unknown parameters".).[8] In 2016, a modeled lightcurves using photometric data from various sources, rendered a sidereal period of 3.88494 and two spin axes of (258.0°, 74.0°) and (54.0°, 37.0°) in ecliptic coordinates.[9]
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Royer measures 7.884 and 8.081 kilometers in diameter and its surface has an albedo of 0.2854 and 0.270, respectively,[10][11] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 9.40 kilometers based on an absolute magnitude of 12.5.[2]
References
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External links
- Royer Oaks Observatory, in Springville, California
- Holy Cross Church, Porterville, January 2012
- Lightcurve Database Query (LCDB), at www.minorplanet.info
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- Template:AstDys
- Template:PAGENAMEBASE at the JPL Small-Body DatabaseTemplate:EditAtWikidata
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