1985 Hopmann
Template:Short description Template:Use dmy dates Script error: No such module "infobox".Script error: No such module "Check for unknown parameters".
1985 Hopmann (prov. designation: Template:Mp) is a dark background asteroid in the outer regions of the asteroid belt. It was discovered on 13 January 1929, by astronomer Karl Reinmuth at Landessternwarte Heidelberg-Königstuhl in southern Germany.[1] The asteroid has a rotation period of 17.5 hours and measures approximately Script error: No such module "convert". in diameter. It was later named after German astronomer Josef Hopmann (1890–1975).[2]
Orbit and classification
Hopmann is a dark C-type asteroid that orbits the Sun in the outer main-belt at a distance of 2.6–3.6 AU once every 5 years and 6 months (2,014 days). Its orbit has an eccentricity of 0.15 and an inclination of 17° with respect to the ecliptic.[3] The first observation used for the body's observation arc was taken at the discovering observatory on 4 February 1926, or 22 days after its official discovering observation.[1]
Naming
This minor planet was named in memory of German astronomer Josef Hopmann (1890–1975), a director of Vienna Observatory between 1951 and 1962, a productive observer of variable and binary stars, and a participant in the international program to observe near-Earth asteroid 433 Eros in the early 1930s. The lunar crater Hopmann is also named in his honour.[2] The official Template:MoMP was published by the Minor Planet Center on 15 October 1977 (M.P.C. 4237Script error: No such module "Check for unknown parameters".).[4]
Physical characteristics
According to the survey carried out by the Infrared Astronomical Satellite IRAS, Hopmann measures 35.51 kilometers in diameter.[3] The Collaborative Asteroid Lightcurve Link agrees with the Supplemental IRAS Minor Planet Survey (SIMPS) data and derives an albedo of 0.039 and a diameter of 35.47 kilometers,[5] while observations with NASA's Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission gave an albedo of 0.06 and a diameter of 44.33 kilometers.[6]
In January and February 2012, three rotational lightcurves were obtained by Robert Stephens at Santana Observatory (646Script error: No such module "Check for unknown parameters".), California, Josep Maria Aymami at Carmelita Observatory (B20Script error: No such module "Check for unknown parameters".), Barcelona, and Patricia Moravec at Oakley Southern Sky Observatory (E09Script error: No such module "Check for unknown parameters".), Australia. The lightcurves gave a well-defined rotation period of 17.476, 17.478 and 17.480 hours, respectively, with a brightness variation between 0.36 and 0.44 magnitude (U=3/3/3-Script error: No such module "Check for unknown parameters".).[7][8][9] In 2016, a re-modeled lightcurve, constructed from data compiled in the Lowell Photometric Database, also gave a concurring period.[10]
References
<templatestyles src="Reflist/styles.css" />
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
<ref> tag with name "Veres-2015" defined in <references> is not used in prior text.Script error: No such module "Check for unknown parameters".
External links
- Prof. Dr. phil. habil. Josef Hopmann, catalogus professorum (Leipzig University)
- Lightcurve Database Query (LCDB), at www.minorplanet.info
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- Template:AstDys
- Template:PAGENAMEBASE at the JPL Small-Body DatabaseTemplate:EditAtWikidata
Script error: No such module "Navbox". Script error: No such module "Navbox". Template:Authority control