1580 Betulia

Eccentric, carbonaceous asteroid September 2020 yes 1580 Betulia #FFC2E0 1580Betulia (Lightcurve Inversion).png Lightcurve-based 3D-model of Betulia E. L. Johnson Johannesburg Obs. 22 May 1950 (1580) Betulia 1950 KA b E ' tj uː l i @ Betulia Toro Herrick(wife of astronomer S. Herrick) NEOAmor 4 September 2017 (JD 2458000.5) 0 66.64 yr (24,342 days) 3.2684 AU 1.1258 AU 2.1971 AU 0.4876 3.26 yr (1,190 days) 252.41° 0.3026 ms / day 52.096° 62.291° 159.50° 0.1365 AU53.2 LD 3.82 km3.9 km4.2 km (CALL-LCDB)4.57 km5.37 0.04 km5.39 0.54 km5.8 km (Gehrels 1994)8.55 5.23 km 6.130 h6.1324 0.0002 h6.134 h6.135 0.005 h6.13836 h6.156 h6.48 h 0.04 0.080.050.07 0.010.0770.08 (Gehrels 1994)0.09 (CALL-LCDB)0.110.17 Tholen CBB–V 0.656U–B 0.249 14.0014.514.5314.5814.814.8 0.314.9015.1 1580 Betulia, provisional designation 1950 KA, is an eccentric, carbonaceous asteroid, classified as near-Earth object of the Amor group, approximately 4.2 kilometers in diameter. It was discovered on 22 May 1950, by South African astronomer Ernest Johnson at the Union Observatory in Johannesburg. The asteroid was named for Betulia Toro, wife of astronomer Samuel Herrick. Orbit and classification Betulia orbits the Sun at a distance of 1.1–3.3 AU once every 3 years and 3 months (1,190 days). Its orbit has an eccentricity of 0.49 and an inclination of 52° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Johannesburg in 1950. Close approaches Betulia is a near-Earth asteroid with an Earth minimum orbital intersection distance (MOID) of 0.1365 AU km on 3, which corresponds to 53.2 lunar distances. As an Amor asteroid, and contrary to the Apollo and Aten asteroids, it approaches Earth's orbit from beyond but does not cross it. Betulia is also a Mars-crosser due to its eccentric orbit. Physical characteristics In the Tholen classification, Betulia is an unusual C-type asteroid, as near-Earth objects are typically of stony rather than carbonaceous composition. Based on images taken by the Sloan Digital Sky Survey, the asteroid has also been characterized as a carbonaceous but "brighter" B-type asteroid. Rotation period Several rotational lightcurves of Betulia were obtained from photometric observations since the 1970s. Analysis of the best-rated lightcurve gave a rotation period of 6.1324 hours with a brightness variation of 0.70 magnitude (U=3), indicating that the body has a non-spheroidal shape. Other observations gave a period between 6.130 and 6.48 hours. Poles Photometric and radiometric observations of Betulia were also used to model the asteroid's lightcurve. It gave a concurring period of 6.13836 hours as well as a spin axis of (133.0°, 22.0°) and (136.0°, 22.0°) in ecliptic coordinates (λ, β), respectively. The results supersede previously determined rotational poles (also see LCDB summary). Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Radar observations at the Arecibo Observatory in Puerto Rico, Tom Gehrels estimate from the Hazards due to Comets and Asteroids, and observations by Alan W. Harris using the NASA Infrared Telescope Facility on Mauna Kea, Hawaii, Betulia measures between 3.82 and 8.55 kilometers in diameter and its surface has an albedo between 0.04 and 0.17. The Collaborative Asteroid Lightcurve Link takes an albedo of 0.09 and a diameter of 4.2 kilometers as best estimates and adopts an absolute magnitude of 15.1. Naming This minor planet was named after Betulia Toro Herrick, wife of Samuel Herrick (1911–1974), an American astronomer who specialized in celestial mechanics. Herrick had studied the asteroid's orbit, and requested the name, along with that of 1685 Toro. The official 1580 naming citation was published by the Minor Planet Center in May 1952 (M.P.C. 768). Further reading L. A. Lebofsky G. J. Veeder M. J. Lebofsky D. L. Matson September 1978 Visual and radiometric photometry of 1580 Betulia http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1978Icar...35..336L Icarus 35 3 336–343 1978Icar...35..336L 10.1016/0019-1035(78)90086-6 12 September 2017 References 30em 2017-01-12 last obs. JPL Small-Body Database Browser: 1580 Betulia (1950 KA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001580 Jet Propulsion Laboratory 12 September 2017 Dictionary of Minor Planet Names – (1580) Betulia Schmadel Lutz D. Springer Berlin Heidelberg 125 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1581 (1580) Betulia Samuel Herrick (1911–1974), Engineering; Astronomy: Los Angeles University of California March 1976 135 http://content.cdlib.org/view?docId=hb9k4009c7;NAAN=13030&doc.view=frames&chunk.id=div00024&toc.depth=1&toc.id=&brand=calisphere 12 September 2017 1580 Betulia (1950 KA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1580 12 September 2017 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) 2009 https://archive.org/details/dictionaryminorp2008schm registration 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 1580 Betulia ERAN – European Asteroid Research Node http://earn.dlr.de/nea/001580.htm 12 September 2017 https://web.archive.org/web/20120208101905/http://earn.dlr.de/nea/001580.htm 2012-02-08 dead 1580 12 September 2017 Harris, Alan W. February 1998 A Thermal Model for Near-Earth Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1998Icar..131..291H Icarus 131 2 291–301 1998Icar..131..291H 10.1006/icar.1997.5865 12 September 2017 Alan W. Harris Michael Mueller Marco Delbó Schelte J. Bus December 2005 The surface properties of small asteroids: Peculiar Betulia---A case study http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2005Icar..179...95H Icarus 179 1 95–108 2005Icar..179...95H 10.1016/j.icarus.2005.05.010 12 September 2017 A. S. Rivkin R. P. Binzel S. J. Bus May 2005 Constraining near-Earth object albedos using near-infrared spectroscopy http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2005Icar..175..175R Icarus 175 1 175–180 2005Icar..175..175R 10.1016/j.icarus.2004.11.005 12 September 2017 6 Christopher Magri Steven J. Ostro Daniel J. Scheeres Michael C. Nolan Jon D. Giorgini Lance A. M. Benner Jean-Luc Margot January 2007 Radar observations and a physical model of Asteroid 1580 Betulia http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2007Icar..186..152M Icarus 186 1 152–177 2007Icar..186..152M 10.1016/j.icarus.2006.08.004 12 September 2017 6 C. R. Nugent A. Mainzer J. Masiero J. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett R. Stevenson E. L. Wright December 2015 NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N The Astrophysical Journal 814 2 13 2015ApJ...814..117N 10.1088/0004-637X/814/2/117 1509.02522 9341381 12 September 2017 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 Austin, Rodney R. D. December 1976 Asteroid 1580 Betulia during the 1976 opposition. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1976SouSt..26..228A South. Stars 26 228–230 1976SouSt..26..228A 12 September 2017 Lagerkvist, Claes-Ingvar October 1977 A Photographic Lightcurve of the Amor Asteroid 1580 Betulia http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1977Icar...32..233L Icarus 32 2 233–234 1977Icar...32..233L 10.1016/0019-1035(77)90063-X 12 September 2017 E. Tedesco J. Drummond M. Candy P. Birch I. Nikoloff B. Zellner September 1978 1580 Betulia - an unusual asteroid with an extraordinary lightcurve http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1978Icar...35..344T Icarus 35 3 344–359.NASA–supportedresearch 1978Icar...35..344T 10.1016/0019-1035(78)90087-8 12 September 2017 J. D. Drummond W. Z. Wisniewski February 1990 The rotational poles and shapes of 1580 Betulia and 3908 (1980PA) from one apparition http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1990Icar...83..349D Icarus 83 2 349–359 0019-1035 1990Icar...83..349D 10.1016/0019-1035(90)90072-H 12 September 2017 W. Z. Wisniewski T. M. Michalowski A. W. Harris R. S. McMillan March 1995 Photoelectric Observations of 125 Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1995LPI....26.1511W Abstracts of the Lunar and Planetary Science Conference 26 1511 1995LPI....26.1511W 12 September 2017 6 Mikko Kaasalainen Petr Pravec Yurij N. Krugly Lenka Sarounová Johanna Torppa Jenni Virtanen Sanna Kaasalainen Anders Erikson Andreas Nathues Josef Durech Marek Wolf Johan S. V. Lagerros Mats Lindgren Claes-Ingvar Lagerkvist Robert Koff John Davies Rita Mann Peter Kusnirák Ninel M. Gaftonyuk Vasilij G. Shevchenko Vasilij G. Chiorny Irina N. Belskaya January 2004 Photometry and models of eight near-Earth asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2004Icar..167..178K Icarus 167 1 178–196 2004Icar..167..178K 10.1016/j.icarus.2003.09.012 12 September 2017 Warner, Brian D. October 2015 Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2015 March–June The Minor Planet Bulletin 42 4 256–266 32455361 7244091 1052-8091 2015MPBu...42..256W B. Carry E. Solano S. Eggl F. E. DeMeo April 2016 Spectral properties of near-Earth and Mars-crossing asteroids using Sloan photometry http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016Icar..268..340C Icarus 268 340–354 2016Icar..268..340C 10.1016/j.icarus.2015.12.047 1601.02087 119258489 12 September 2017 External links IAUC 1268 - Initial discovery 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/20241208174218/http://obswww.unige.ch/~behrend/page_cou.html 8 December 2024 – Observatoire de Genève, Raoul Behrend 1580 1580 Betulia 1579 Herrick 1580 1581 Abanderada 001580 Category:Discoveries by Ernest Leonard Johnson Category:Named minor planets 001580 19500522