735 Marghanna

Marghanna is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. It orbits the Sun in the central asteroid belt at a distance of 1.9–3.6 AU once every 4 years and 6 months (1,647 days; semi-major axis of 2.73 AU). Its orbit has an eccentricity of 0.32 and an inclination of 17° with respect to the ecliptic. The body's observation arc begins at Heidelberg Observatory on 29 November 1921, almost nine years after its official discovery observation.

This minor planet was named by the discoverer Heinrich Vogt after his mother Margarete Vogt and after one of his relatives, Hanna. The {{MoMP|735|naming citation}} was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ({{small|H 74}}).

In the Tholen classification and in the SDSS-based taxonomy, Marghanna is a common, carbonaceous C-type asteroid, while in the Bus–Binzel SMASS classification, it is a hydrated C-type (Ch).

In May 2011, a rotational lightcurve of Marghanna was obtained from photometric observations by American astronomer Brian Skiff and collaborators using telescopes at the Lowell Observatory in Flagstaff, Arizona. The 2019-revised lightcurve analysis gave a well-defined rotation period of ({{val|20.625|0.011}}) hours with a small brightness variation of ({{val|0.12|0.01}}) magnitude, indicative of a rather spherical shape ({{small|U=3}}). Lower rated measurements determined a period of 15.95 hours (Rafa Mohamed, 1995), 24 hours (Raymond Poncy, 2005) and {{val|20.62|0.02}} hours (Brian Skiff, 2014) with an amplitude of {{val|0.11}}, {{val|0.10}} and {{val|0.13}} magnitude, respectively ({{small|U=2/1+/3−}}).

According to the surveys carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), the Infrared Astronomical Satellite IRAS, and the Japanese Akari satellite, Marghanna measures ({{val|67.235|0.513}}), ({{val|74.32|1.6}}) and ({{val|78.69|1.62}}) kilometers in diameter and its surface has an albedo of ({{val|0.059|0.007}}), ({{val|0.0484|0.0484}}) and ({{val|0.043|0.002}}), respectively.

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0423 and a diameter of 74.23 kilometers based on an absolute magnitude of 9.7, while the Cornell Mid-IR Asteroid Spectroscopy (MIDAS) survey determined a diameter of ({{val|73|6}}) kilometers and Benoit Carry one of ({{val|72.27|2.22}}) kilometers. Alternative mean-diameters published by the WISE team include ({{val|57.25|26.07|ul=km}}), ({{val|67.976|0.404|u=km}}), ({{val|70.640|1.230|u=km}}) and ({{val|87.951|34.60|u=km}}) with a corresponding albedo of ({{val|0.05|0.09}}), ({{val|0.059|0.007}}), ({{val|0.0536|0.0078}}) and ({{val|0.0275|0.0259}}).

Two asteroid occultations on 11 March 2008 and on 4 May 2010, gave a best-fit ellipse dimension of ({{val|81.6|x|73.5|u=km}}) and ({{val|74.0|x|64.0|u=km}}), respectively, each with an intermediate quality rating of 2. These timed observations are taken when the asteroid passes in front of a distant star.

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• [http://www.minorplanet.info/PHP/OneAsteroidInfo.php Lightcurve Database Query] (LCDB), at www.minorplanet.info
• [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
• [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Geneva Observatory, Raoul Behrend
• [http://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
• {{AstDys|735}}
• {{JPL small body}}

{{Minor planets navigator |734 Benda |number=735 |736 Harvard}}

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000735

Category:Discoveries by Heinrich Vogt

Category:Named minor planets

000735

000735

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