1609 Brenda

Main-belt asteroid October 2019 yes 1609 Brenda #D6D6D6 10 July 1951 E. L. Johnson Johannesburg Obs. (1609) Brenda 1951 NL1925 EA1934 JB1947 WB1950 HD1954 EP1954 HE Brenda (discoverer's granddaughter) main-belt(middle)Gersuind 4 September 2017 (JD 2458000.5) 0 82.98 yr (30,310 days) 3.2255 AU 1.9432 AU 2.5844 AU 0.2481 4.15 yr (1,518 days) 309.08° 0.2372 ms / day 18.628° 105.23° 229.14° 26.27 6.75 km27.96 0.48 km29.59 km (derived)29.64 1.7 km (IRAS:6) 19.46 h23 1 h 0.1078 (derived)0.1147 0.014 (IRAS:6)0.13 0.050.133 0.005 SB–V = 0.860U–B = 0.390 10.5010.610.6110.68 1609 Brenda, provisional designation 1951 NL, is a stony asteroid from the central region of the asteroid belt, approximately 28 kilometers in diameter. It was discovered on 10 July 1951, by South African astronomer Ernest Johnson at the Johannesburg Observatory in South Africa, and named after his granddaughter, Brenda. Orbit and classification The S-type asteroid orbits the Sun in the central main-belt at a distance of 1.9–3.2 AU once every 4 years and 2 months (1,518 days). Its orbit has an eccentricity of 0.25 and an inclination of 19° with respect to the ecliptic. Brenda was first identified as 1925 EA at Simeiz Observatory in 1925. Its observation arc begins 17 years prior to its official discovery observation, with its identification 1934 JB, also made at Simeiz. Physical characteristics American astronomer Richard Binzel obtained the first rotational lightcurve of Brenda in June 1984. It gave a rotation period of 19.46 hours with a brightness variation of 0.16 magnitude (U=2). In June 2006, a period of 23 1 with an amplitude of 0.26 magnitude was derived from photometric observations made by French amateur astronomer René Roy (U=2). According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Brenda measures between 26.27 and 29.64 kilometers in diameter, and its surface has an albedo between 0.115 and 0.133. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1078 and a diameter of 29.59 kilometers with an absolute magnitude of 10.68. Naming This minor planet was named by the discoverer for his granddaughter, Brenda. The official 1609 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3931). Ernest Johnson is also known for the discovery of the periodic comet 48P/Johnson, using the Franklin-Adams Star Camera. References 2017-05-05 last obs. JPL Small-Body Database Browser: 1609 Brenda (1951 NL) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001609 Jet Propulsion Laboratory 5 June 2017 Dictionary of Minor Planet Names – (1609) Brenda Schmadel Lutz D. Springer Berlin Heidelberg 128 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1610 (1609) Brenda 1609 Brenda (1951 NL) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1609 29 December 2016 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 Asteroids and comets rotation curves – (1609) Brenda Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001609 29 December 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001609 dead 1609 29 December 2016 E. F. Tedesco P. V. Noah M. Noah S. D. Price October 2004 IRAS Minor Planet Survey V6.0 https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0 2004PDSS...12.....T 17 October 2019 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) 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 The Astrophysical Journal 814 2 13 2015ApJ...814..117N 10.1088/0004-637X/814/2/117 1509.02522 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 29 December 2016 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/20241208174218/http://obswww.unige.ch/~behrend/page_cou.html 8 December 2024 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1609 1608 Muñoz 1609 1610 Mirnaya 001609 Category:Discoveries by Ernest Leonard Johnson Category:Named minor planets 19510710