1305 Pongola

Main-belt asteroid October 2019 yes 1305 Phongol0 #D6D6D6 H. E. Wood Johannesburg Obs. 19 July 1928 (1305) Phongola 1928 OC1927 FD1929 SQ1932 FA1933 MB1979 NE Pongola River(South Africa river) main-belt(outer)background 4 September 2017 (JD 2458000.5) 0 90.59 yr (33,087 days) 3.2336 AU 2.7909 AU 3.0123 AU 0.0735 5.23 yr (1,910 days) 89.261° 0.1885 ms / day 2.3174° 62.956° 146.96° 24.110 0.277 km25.12 0.91 km25.124 0.200 km41.45 km (derived) 8 h8.03 h8.0585 0.0003 h8.059 0.0015 h8.06 0.02 h8.335 0.002 h 0.057 (assumed)0.157 0.0120.1576 0.02960.169 0.038 C (suspected)B–V 0.700 10.426 0.002 (R)10.6410.65 1305 Phongolo, provisional designation 1928 OC, is a background asteroid from the outer regions of the asteroid belt, approximately 25 kilometers in diameter. It was discovered on 19 July 1928, by English astronomer Harry Edwin Wood at the Union Observatory in Johannesburg, South Africa. The asteroid was named for the South African Pongola River. Orbit and classification Phongolo is a non-family asteroid from the main belt's background population. It orbits the Sun in the outer asteroid belt at a distance of 2.8–3.2 AU once every 5 years and 3 months (1,910 days; semi-major axis of 3.01 AU). Its orbit has an eccentricity of 0.07 and an inclination of 2° with respect to the ecliptic. The body's observation arc begins with its first observation as 1927 FD at Heidelberg Observatory in March 1927, or 16 months prior to its official discovery observation at Johannesburg. Physical characteristics Phongolo is a suspected carbonaceous C-type asteroid. The space-based survey gave an albedo (see below) that is not in-line with a carbonaceous spectral type. Rotation period Several rotational lightcurve of Phongolo have been obtained from photometric observations since 1984. Analysis of the best-rated lightcurve gave a rotation period of 8.335 hours and a consolidated brightness amplitude between 0.14 and 0.19 magnitude (U=3-). 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, Pongola measures between 24.110 and 25.124 kilometers in diameter and its surface has an albedo between 0.157 and 0.169. The Collaborative Asteroid Lightcurve Link assumes a much lower standard albedo for carbonaceous asteroids of 0.057 and consequently derives a much larger diameter of 41.45 kilometers based on an absolute magnitude of 10.64. Naming This minor planet was named by the discoverer after the Phongolo River (Phongolo; Pongolarivier) in KwaZulu-Natal, South Africa. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 119). References 30em 2017-10-29 last obs. JPL Small-Body Database Browser: 1305 Pongola (1928 OC) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001305 Jet Propulsion Laboratory 19 December 2017 Dictionary of Minor Planet Names https://archive.org/details/dictionaryminorp00schm limited Schmadel Lutz D. Springer Berlin Heidelberg 107 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1306 (1305) Pongola 1305 Pongola (1928 OC) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1305 19 December 2017 Asteroids and comets rotation curves – (1305) Pongola Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001305 19 December 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001305 dead 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 The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 Asteroid 1305 Pongola – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1305 29 October 2019 1305 19 December 2017 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 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 free (online, AcuA catalog p. 153) Richard Ditteon Lauren Horn Amy Kamperman Bradley Vorjohan Elaine Kirkpatrick January 2012 Asteroid Lightcurve Analysis at the Oakley Souther Sky Observatory: 2011 April–May http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39...26D The Minor Planet Bulletin 39 1 26–28 1052-8091 2012MPBu...39...26D 19 December 2017 6 Adam Waszczak Chan-Kao Chang Eran O. Ofek Russ Laher Frank Masci David Levitan Jason Surace Yu-Chi Cheng Wing-Huen Ip Daisuke Kinoshita George Helou Thomas A. Prince Shrinivas Kulkarni September 2015 Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W The Astronomical Journal 150 3 35 2015AJ....150...75W 10.1088/0004-6256/150/3/75 1504.04041 19 December 2017 6 Pedro V. Sada Lorenzo Olguin Julio C. Saucedo Pablo Loera-Gonzalez Laura Cantu-Sanchez Jaime R. Garza Sandra A. Ayala-Gomez Andres Aviles Eduardo Perez-Tijerina Samuiel Navarro-Meza J. S. Silva Mauricio Reyes-Ruiz Juan Segura-Sosa Ricardo Lopez-Valdivia F. Alvarez-Santana July 2017 Results of the 2016 Mexican Asteroid Photometry Campaign http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2017MPBu...44..239S The Minor Planet Bulletin 44 3 239–242 1052-8091 2017MPBu...44..239S 19 December 2017 6 Enrique Arce Mansego Pedro Brines Rodriguez Juan Lozano de Haro Onofre Rodrigo Chiner Alvaro Fornas Silva David Herrero Porta Vicente Mas Martinez Gonzalo Fornas Silva Alfonso Carreno Garceran October 2016 Eighteen Asteroids Lightcurves at Asteroides Observers (OBAS) - MPPD: 2016 March–May http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43..332M The Minor Planet Bulletin 43 4 332–336 1052-8091 2016MPBu...43..332M 19 December 2017 Binzel, R. P. October 1987 A photoelectric survey of 130 asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1987Icar...72..135B Icarus 72 1 135–208 0019-1035 1987Icar...72..135B 10.1016/0019-1035(87)90125-4 19 December 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 1305 1304 Arosa 1305 1306 Scythia 001305 Category:Discoveries by Harry Edwin Wood Category:Named minor planets 19280719