1429 Pemba

Main-belt asteroid October 2019 yes 1429 Pemba #D6D6D6 C. Jackson Johannesburg Obs. 2 July 1937 (1429) Pemba 1937 NH1949 JK Pemba Island(African East coast) main-belt(inner)background 4 September 2017 (JD 2458000.5) 0 79.93 yr (29,193 days) 3.4109 AU 1.7004 AU 2.5557 AU 0.3347 4.09 yr (1,492 days) 207.67° 0.2412 ms / day 7.7492° 47.700° 297.82° 8.71 1.86 km9.874 0.051 km10.37 km (taken)10.371 km10.531 0.041 km10.75 0.67 km 20 h 0.13160.154 0.0210.1598 0.02350.19 0.110.196 0.022 S (assumed) 12.412.5012.7412.74 0.2 1429 Pemba, provisional designation 1937 NH, is a stony background asteroid from the central regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 2 July 1937, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named for the Pemba Island off the coast of Tanzania. Orbit and classification Pemba is a non-family asteroid from the main belt's background population. It orbits the Sun in the central main-belt at a distance of 1.7–3.4 AU once every 4 years and 1 month (1,492 days). Its orbit has an eccentricity of 0.33 and an inclination of 8° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Johannesburg. Physical characteristics Pemba is an assumed stony S-type asteroid. Rotation period In September 1982, a rotational lightcurve of Pemba was obtained from photometric observations. Analysis of the fragmentary lightcurve gave a rotation period of 20 hours with a brightness amplitude of 0.3 magnitude (U=1). As of 2017, no secure period has been determined. Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Pemba measures between 8.71 and 10.75 kilometers in diameter and its surface has an albedo between 0.1316 and 0.196. The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE results, that is, an albedo of 0.1316 and a diameter of 10.37 kilometers based on an absolute magnitude of 12.74. Naming This minor planet was named for the Pemba Island, Tanzania, part of the Zanzibar Archipelago, which was once under the rule of the Sultan of Zanzibar. It is located off the East Coast of Africa in the Indian Ocean. The official 1429 naming citation was published by the Minor Planet Center in April 1953 (M.P.C. 909). References 30em 2017-06-05 last obs. JPL Small-Body Database Browser: 1429 Pemba (1937 NH) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001429 Jet Propulsion Laboratory 26 October 2017 Dictionary of Minor Planet Names – (1429) Pemba Schmadel Lutz D. Springer Berlin Heidelberg 115 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1430 (1429) Pemba 1429 Pemba (1937 NH) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1429 26 October 2017 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) 2009 https://archive.org/details/dictionaryminorp2008schm limited Appendix – Publication Dates of the MPCs Schmadel Lutz D. Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 2009dmpn.book.....S 6 Joseph R. Masiero T. Grav A. K. Mainzer C. R. Nugent J. M. Bauer R. Stevenson S. Sonnett August 2014 Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 119293330 26 October 2017 Small Bodies Data Ferret Nesvorny HCM Asteroid Families V3.0 https://sbntools.psi.edu/ferret/PropertySearch/familyForm.action 26 October 2017 https://web.archive.org/web/20170802210005/http://sbntools.psi.edu/ferret/PropertySearch/familyForm.action 2 August 2017 dead 1429 26 October 2017 Petr Pravec Alan W. Harris Peter Kusnirák Adrián Galád Kamil Hornoch September 2012 Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P Icarus 221 1 365–387 2012Icar..221..365P 10.1016/j.icarus.2012.07.026 26 October 2017 11104/0217021 free 6 C. R. Nugent A. Mainzer J. Bauer R. M. Cutri E. A. Kramer T. Grav J. Masiero S. Sonnett E. L. Wright September 2016 NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos The Astronomical Journal 152 3 12 2016AJ....152...63N 10.3847/0004-6256/152/3/63 1606.08923 free 6 Fumihiko Usui Daisuke Kuroda Thomas G. Müller Sunao Hasegawa Masateru Ishiguro Takafumi Ootsubo Daisuke Ishihara Hirokazu Kataza Satoshi Takita Shinki Oyabu Munetaka Ueno Hideo Matsuhara Takashi Onaka October 2011 Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey Publications of the Astronomical Society of Japan 63 5 1117–1138 2011PASJ...63.1117U 10.1093/pasj/63.5.1117 (online, AcuA catalog p. 153) 6 A. Mainzer T. Grav J. Masiero E. Hand J. Bauer D. Tholen R. S. McMillan T. Spahr R. M. Cutri E. Wright J. Watkins W. Mo C. Maleszewski November 2011 NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results The Astrophysical Journal 741 2 25 2011ApJ...741...90M 10.1088/0004-637X/741/2/90 1109.6407 35447010 A. W. Harris J. W. Young E. Bowell D. J. Tholen November 1999 Asteroid Lightcurve Observations from 1981 to 1983 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1999Icar..142..173H Icarus 142 1 173 1999Icar..142..173H 10.1006/icar.1999.6181 26 October 2017 External links Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) Dictionary of Minor Planet Names, Google books Asteroids and comets rotation curves, CdR https://web.archive.org/web/20160729213840/http://obswww.unige.ch/~behrend/page_cou.html 29 July 2016 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1429 1428 Mombasa 1429 1430 Somalia 001429 Category:Discoveries by Cyril Jackson (astronomer) Category:Named minor planets 19370702