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F r o m W i k i p e d i a , t h e f r e e e n c y c l o p e d i a
4659 Roddenberry , provisional designation 1981 EP20 , is a Nysian asteroid from the inner regions of the asteroid belt , approximately 3.6 kilometers (2.2 miles) in diameter. It was discovered on 2 March 1981, by American astronomer Schelte Bus at the Siding Spring Observatory in Australia.[1] The likely S-type asteroid has an unsecured rotation period of 12 hours.[3] It was named for American screenwriter Gene Roddenberry .[1]
Orbit and classification
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Roddenberry is a core member of the Nysa family (405 ),[3] [4] a very large family of stony asteroids, alternatively known as Herta family. It is part of the Nysa–Polana complex, the largest grouping of asteroids in the main-belt. The complex is typically further divided into subfamilies with different spectral properties.[9] : 23
The asteroid orbits the Sun in the inner asteroid belt at a distance of 1.8–2.9 AU once every 3 years and 8 months (1,334 days; semi-major axis of 2.37 AU ). Its orbit has an eccentricity of 0.22 and an inclination of 2° with respect to the ecliptic .[2] The body's observation arc begins with a precovery taken at Palomar Observatory in February 1977, or four years prior to its official discovery observation at Siding Spring.[1]
Physical characteristics
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Roddenberry is an assumed stony S-type asteroid , typical for core members of the Nysa family and in agreement with its high albedo (see below) .[3]
Rotation period
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In the 1990s, a fragmentary rotational lightcurve of Roddenberry was obtained from photometric observations by Richard Binzel . Lightcurve analysis gave a highly uncertain rotation period of 12 hours with a brightness amplitude of 0.14 magnitude (U=1 ). As of 2018, no secure period has been obtained.[3] [7]
Diameter and albedo
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According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer , Roddenberry measures 3.622 kilometers in diameter and its surface has an albedo of 0.193,[5] [6] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20, and derives a diameter of 3.56 kilometers based on an absolute magnitude of 14.61.[3]
Naming
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This minor planet was named in memory of famous American screenwriter, producer and futurist, Gene Roddenberry (1921–1991), known for the Star Trek and Star Trek: The Next Generation television series, and for the Star Trek film franchise .[1] The official naming citation was published by the Minor Planet Center on 18 February 1992 (M.P.C. 19698 ).[10]
References
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^ a b c d "JPL Small-Body Database Browser: 4659 Roddenberry (1981 EP20)" (2018-04-21 last obs.). Jet Propulsion Laboratory . Retrieved 17 May 2018 .
^ a b c d e f g h i j "LCDB Data for (4659) Roddenberry" . Asteroid Lightcurve Database (LCDB). Retrieved 17 May 2018 .
^ a b "Asteroid 4659 Roddenberry" . Small Bodies Data Ferret . Retrieved 17 May 2018 .
^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal . 741 (2 ): 20. arXiv :1109.4096 . Bibcode :2011ApJ...741...68M . doi :10.1088/0004-637X/741/2/68 . S2CID 118745497 .
^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal . 741 (2 ): 25. arXiv :1109.6407 . Bibcode :2011ApJ...741...90M . doi :10.1088/0004-637X/741/2/90 . S2CID 35447010 . (catalog )
^ a b c Binzel, Richard P.; Xu, Shui; Bus, Schelte J.; Bowell, Edward (September 1992). "Small Main-Belt Asteroid Lightcurve Survey". Icarus . 99 (1 ): 225–237. Bibcode :1992Icar...99..225B . doi :10.1016/0019-1035(92 )90184-9 . ISSN 0019-1035 .
^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus . 261 : 34–47. arXiv :1506.00762 . Bibcode :2015Icar..261...34V . doi :10.1016/j.icarus.2015.08.007 . S2CID 53493339 .
^ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV . pp. 297–321. arXiv :1502.01628 . Bibcode :2015aste.book..297N . doi :10.2458/azu_uapress_9780816532131-ch016 . ISBN 9780816532131 . S2CID 119280014 .
^ "MPC/MPO/MPS Archive" . Minor Planet Center . Retrieved 17 May 2018 .
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=4659_Roddenberry&oldid=1191638374 "
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