1474 Beira

Asteroid yes 1474 Beira #FA8072 C. Jackson Johannesburg Obs. 20 August 1935 (1474) Beira 1935 QY1950 DQ Beira(city in Mozambique) Mars-crosser 4 September 2017 (JD 2458000.5) 0 81.06 yr (29,606 d) 4.0740 AU 1.3920 AU 2.7330 AU 0.4907 4.52 yr (1,650 days) 19.609° 0.2181 ms / day 26.683° 323.50° 84.070° 8.73 km (calculated)14.9 1.5 km15 2 km15.46 1.55 km 4.184 0.001 hlightcurve-plot-Antelope-Hills4.184 0.002 h 0.06 0.010.064 0.0130.07 0.010.20 (assumed) Tholen FXSMASS BB–V 0.620U–B 0.245 12.66 1474 Beira, provisional designation 1935 QY, is a bright carbonaceous asteroid and large Mars-crosser on an eccentric orbit from the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 20 August 1935, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named after the port city of Beira in Mozambique. Orbit and classification Beira 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 1.4–4.1 AU once every 4 years and 6 months (1,650 days). Its orbit has a high eccentricity of 0.49 and an inclination of 27° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Johannesburg in 1935. Physical characteristics In the SMASS classification, Beira is a bright carbonaceous B-type asteroid, while in the Tholen classification its spectral type is ambiguous, closest to an F-type and somewhat similar to that of an X-type asteroid. Rotation period Three rotational lightcurves of Beira were obtained from photometric observations. Lightcurve analysis gave a well-defined rotation period of 4.184 hours with a brightness amplitude between 0.15 and 0.24 magnitude (U=3/3/3).lightcurve-plot-Antelope-Hills Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Beira measures between 14.9 and 15.46 kilometers in diameter and its surface has a low albedo between 0.06 and 0.07. Conversely, the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and consequently calculates a smaller diameter of 8.73 kilometers using an absolute magnitude of 12.66. With a diameter close to 15 kilometers, Beira is larger than most sizeable Mars-crossing asteroids such as 1065 Amundsenia (9.75 km), 1139 Atami (9.35 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) 1310 Villigera (15.24 km), and 1468 Zomba (7 km); but still smaller than the largest members of this dynamical group, namely, 132 Aethra, 323 Brucia, 1508 Kemi, 2204 Lyyli and 512 Taurinensis, which are larger than 20 kilometers in diameter (in one or other given source). Naming This minor planet was named after the port city of Beira in Mozambique. The official 1474 naming citation was published by the Minor Planet Center in April 1953 (M.P.C. 909). Notes lightcurve-plot-Antelope-Hills Lightcurve plot of (1474) Beira, Robert Koff, Antelope Hills Observatory (H09). Summary figures at LCDB References 30em 2016-09-09 last obs. JPL Small-Body Database Browser: 1474 Beira (1935 QY) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001474 Jet Propulsion Laboratory 21 October 2017 Dictionary of Minor Planet Names – (1474) Beira Schmadel Lutz D. Springer Berlin Heidelberg 118 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1475 (1474) Beira 1474 Beira (1935 QY) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1474 21 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 1474 21 October 2017 6 V. Alí-Lagoa J. de León J. Licandro M. Delbó H. Campins N. Pinilla-Alonso M. S. Kelley June 2013 Physical properties of B-type asteroids from WISE data http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013A&A...554A..71A Astronomy and Astrophysics 554 16 2013A&A...554A..71A 10.1051/0004-6361/201220680 1303.5487 21 October 2017 6 V. Alí-Lagoa J. Licandro R. Gil-Hutton Cañ M. ada-Assandri M. Delbo' J. de León H. Campins N. Pinilla-Alonso M. S. P. Kelley J. Hanus June 2016 Differences between the Pallas collisional family and similarly sized B-type asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...591A..14A Astronomy and Astrophysics 591 11 2016A&A...591A..14A 10.1051/0004-6361/201527660 21 October 2017 free 11336/63614 free 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 21 October 2017 Gordana Apostolovska Violeta Ivanova Galin Borisov June 2004 Lightcurves and rotational periods of 1474 Beira, 1309 Hyperborea, and 2525 O'Steen http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2004MPBu...31...44A The Minor Planet Bulletin 31 2 44–45 1052-8091 2004MPBu...31...44A 21 October 2017 Koff, Robert A. June 2004 Lightcurve photometry of Mars-crossing asteroids 1474 Beira and 3674 Erbisbuhl http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2004MPBu...31...33K The Minor Planet Bulletin 31 2 33–34 1052-8091 2004MPBu...31...33K 21 October 2017 Luca Strabla Ulisse Quadri Robert Girelli April 2013 Asteroid Observed from Bassano Bresciano Observatory 2012 August–September http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013MPBu...40...83S The Minor Planet Bulletin 40 2 83–84 1052-8091 2013MPBu...40...83S 21 October 2017 External links Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 2017-12-16 ) 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 2016-07-29 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1474 2001474 1473 Ounas 1474 1475 Yalta 001474 Category:Discoveries by Cyril Jackson (astronomer) Category:Named minor planets 001474 001474 19350820