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736 Harvard (prov. designation : A912 WC or 1912 PZ ) is a stony background asteroid from the inner regions of the asteroid belt , approximately 17 kilometers (11 miles) in diameter. It was discovered on 16 November 1912, by American astronomer Joel Hastings Metcalf at the Winchester Observatory (799 ).[1] The bright S-type asteroid has a rotation period of 6.7 hours. It was named after Harvard University in Cambridge, Massachusetts .[2]
Orbit and classification
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Located in the orbital region of the Flora family (402 ), Harvard 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 3 months (1,193 days; semi-major axis of 2.2 AU ). Its orbit has an eccentricity of 0.17 and an inclination of 4° with respect to the ecliptic .[3] The body's observation arc begins at Heidelberg Observatory on 9 December 1912, or three weeks after its official discovery observation by Metcalf at Winchester.[1]
Naming
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This minor planet was named in honor of the prestigious Harvard University in Cambridge, Massachusetts , United States. The naming was also mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 74 ).[2]
Physical characteristics
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In the Tholen classification , Harvard is a common, stony S-type asteroid .[3] [5]
Rotation period
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In 1970s, a rotational lightcurve of Harvard was obtained from photometric observations by Ed Tedesco .[11] Lightcurve analysis gave a well-defined rotation period of 6.7 hours with a brightness variation of 0.32 magnitude (U=3 ).[10]
Diameter and albedo
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According to the surveys carried out by the Infrared Astronomical Satellite IRAS , the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), and the Japanese Akari satellite , Harvard measures ( 16.66± 0.6 ), ( 17.111± 0.125 ) and ( 17.92± 0.27 ) kilometers in diameter and its surface has an albedo of ( 0.1406± 0.011 ), ( 0.133± 0.022 ) and ( 0.122± 0.004 ), respectively.[7] [8] [9] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.2051 and a diameter of 16.89 kilometers based on an absolute magnitude of 11.2.[10] An asteroid occultation observed on 25 May 2003, gave a best-fit ellipse dimension of ( 9.0 km × 9.0 km ) with a low quality rating of 1.[5] These timed observations are taken when the asteroid passes in front of a distant star.[5]
References
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^ a b c Schmadel, Lutz D. (2007). "(736) Harvard". Dictionary of Minor Planet Names . Springer Berlin Heidelberg. p. 70. doi :10.1007/978-3-540-29925-7_737 . ISBN 978-3-540-00238-3 .
^ a b c d e f g h "JPL Small-Body Database Browser: 736 Harvard (A912 WC)" (2019-10-16 last obs.). Jet Propulsion Laboratory . Archived from the original on 15 December 2019. Retrieved 8 June 2020 .
^ a b "Asteroid 736 Harvard – Proper Elements" . AstDyS-2, Asteroids – Dynamic Site. Archived from the original on 8 June 2020. Retrieved 8 June 2020 .
^ a b c d e "Asteroid 736 Harvard" . Small Bodies Data Ferret . Archived from the original on 8 June 2020. Retrieved 8 June 2020 .
^ a b Zappalà, V.; Bendjoya, Ph.; Cellino, A.; Farinella, P.; Froeschle, C. (1997). "Asteroid Dynamical Families" . NASA Planetary Data System : EAR-A-5-DDR-FAMILY-V4.1. Archived from the original on 6 November 2021. Retrieved 8 June 2020 . } (PDS main page Archived 11 August 2021 at the Wayback Machine )
^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0" . NASA Planetary Data System . 12 : IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode :2004PDSS...12.....T . Archived from the original on 14 June 2018. Retrieved 8 June 2020 .
^ a b c d Mainzer, A. K.; Bauer, J. M.; Cutri, R. M.; Grav, T.; Kramer, E. A.; Masiero, J. R.; et al. (June 2016). "NEOWISE Diameters and Albedos V1.0" . NASA Planetary Data System : EAR-A-COMPIL-5-NEOWISEDIAM-V1.0. Bibcode :2016PDSS..247.....M . Archived from the original on 2 July 2018. Retrieved 8 June 2020 .
^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan . 63 (5 ): 1117–1138. Bibcode :2011PASJ...63.1117U . doi :10.1093/pasj/63.5.1117 . (online Archived 29 January 2022 at the Wayback Machine , AcuA catalog p. 153 Archived 25 March 2019 at the Wayback Machine )
^ a b c "LCDB Data for (736) Harvard" . Asteroid Lightcurve Database (LCDB). Archived from the original on 8 June 2020. Retrieved 8 June 2020 .
^ a b Tedesco, E.F. (1979), PhD Dissertation , New. Mex. State Univ., p. 280
External links
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R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=736_Harvard&oldid=1218131288 "
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