1468 Zomba

Mars-crossing asteroid October 2019 yes 1468 Zomba #FA8072 C. Jackson Johannesburg Obs. 23 July 1938 (1468) Zomba 1938 PA Zomba (Malawian city) Mars-crosser 4 September 2017 (JD 2458000.5) 0 78.47 yr (28,660 days) 2.7913 AU 1.5998 AU 2.1956 AU 0.2713 3.25 yr (1,188 days) 95.275° 0.3030 ms / day 9.9388° 308.93° 23.188° 6.97 1.39 km8.57 km (calculated) 2.769 0.005 hlightcurve-plot-Warner2.77 h2.772 0.006 h2.773 0.001 h 0.20 (assumed)0.302 0.121 QS (assumed) 12.7013.05 0.45 1468 Zomba, provisional designation 1938 PA, is a stony asteroid and large Mars-crosser near the innermost regions of the asteroid belt, approximately 7 kilometers in diameter. Discovered by Cyril Jackson at Johannesburg Observatory in 1938, the asteroid was named after the city of Zomba in the Republic of Malawi. Discovery Zomba was discovered on 23 July 1938, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg, South Africa. It was independently discovered by French astronomer Louis Boyer at the Algiers Observatory, Algeria, on 2 August 1938, who first announce the asteroid's discovery. The Minor Planet Center (MPC) only recognizes the first discoverer. Orbit and classification Zomba is a Mars-crossing asteroid, a dynamically unstable group between the main belt and the near-Earth populations, crossing the orbit of Mars at 1.666 AU. It orbits the Sun at a distance of 1.6–2.8 AU once every 3 years and 3 months (1,188 days). Its orbit has an eccentricity of 0.27 and an inclination of 10° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Johannesburg. Physical characteristics Zomba has been characterized as a Q-type asteroid by Pan-STARRS photometric survey. The Lightcurve Data Base assumes it to be a common S-type asteroid. Rotation period Several rotational lightcurves of Zomba have been obtained from photometric observations. Lightcurve analysis gave a consolidated rotation period of 2.773 hours with a brightness amplitude between 0.3 and 0.36 magnitude (U=3-/2/3/3).lightcurve-plot-Warner Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Zomba measures 6.97 kilometers in diameter and its surface has an albedo of 0.302, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 8.57 kilometers based on an absolute magnitude of 12.7. This makes Zomba one of the largest mid-sized Mars-crossing asteroids comparable with 1065 Amundsenia (9.75 km), 1139 Atami (9.35 km), 1474 Beira (8.73 km), 1011 Laodamia (7.39 km), 1727 Mette (est 9 km), 1131 Porzia (7.13 km), 1235 Schorria (est. 9 km), 985 Rosina (8.18 km) and 1310 Villigera (15.24 km), but far smaller than the largest members of this dynamical group, namely, 132 Aethra, 323 Brucia, 1508 Kemi, 2204 Lyyli and 512 Taurinensis, which are all larger than 20 kilometers in diameter. Naming This minor planet was named after the town of Zomba in the Republic of Malawi, known as Nyasaland, a British protectorate, at the time of naming. The official 1468 naming citation was published by the Minor Planet Center in April 1953 (M.P.C. 909). Notes lightcurve-plot-Warner Lightcurve plot of (1468) Zomba, Brian Warner (2015), Palmer Divide Station, California. Rotation period 2.769 0.005 hours with a brightness amplitude of 0.33 mag. Quality code of 3-ä. Summary figures at the LCDB References 30em 2017-01-09 last obs. JPL Small-Body Database Browser: 1468 Zomba (1938 PA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001468 Jet Propulsion Laboratory 20 October 2017 Dictionary of Minor Planet Names (1468) Zomba Schmadel Lutz D. Springer Berlin Heidelberg 117 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1469 1468 Zomba (1938 PA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1468 20 October 2017 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) 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 1468 20 October 2017 V. Alí-Lagoa M. Delbo' July 2017 Sizes and albedos of Mars-crossing asteroids from WISE/NEOWISE data https://www.aanda.org/articles/aa/pdf/2017/07/aa29917-16.pdf Astronomy and Astrophysics 603 8 2017A&A...603A..55A 10.1051/0004-6361/201629917 1705.10263 20 October 2017 W. Z. Wisniewski R. S. McMillan May 1987 Differential CCD photometry of faint asteroids in crowded star fields and nonphotometric sky conditions http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1987AJ.....93.1264W Astronomical Journal 93 1264–1267 0004-6256 1987AJ.....93.1264W 10.1086/114408 20 October 2017 free Alkema, Michael S. January 2014 Asteroid Lightcurve Analysis at Elephant Head Observatory: 2013 August- October http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014MPBu...41...40A The Minor Planet Bulletin 41 1 40 1052-8091 2014MPBu...41...40A 20 October 2017 Benishek, Vladimir April 2014 Rotation Period Determination for 1425 Tuorla, 1468 Zomba, 1486 Marilyn, 2112 Ulyanov, and (101158) 2000 OL http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014MPBu...41..126B The Minor Planet Bulletin 41 2 126–127 1052-8091 2014MPBu...41..126B 20 October 2017 Warner, Brian D. July 2015 Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 December - 2015 March http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015MPBu...42..167W The Minor Planet Bulletin 42 3 167–172 1052-8091 2015MPBu...42..167W 20 October 2017 6 Peter Veres Robert Jedicke Alan Fitzsimmons Larry Denneau Mikael Granvik Bryce Bolin Serge Chastel Richard J. Wainscoat William S. Burgett Kenneth C. Chambers Heather Flewelling Nick Kaiser Eugen A. Magnier Jeff S. Morgan Paul A. Price John L. Tonry Christopher Waters November 2015 Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V Icarus 261 34–47 2015Icar..261...34V 10.1016/j.icarus.2015.08.007 1506.00762 20 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 1468 1467 Mashona 1468 1469 Linzia 001468 Category:Discoveries by Cyril Jackson (astronomer) Category:Named minor planets 19380723