1623 Vivian

Main-belt asteroid October 2019 yes 1623 Vivian #D6D6D6 001623-asteroid shape model (1623) Vivian.png Shape model of Vivian from its lightcurve 9 August 1948 Ernest Johnson Johannesburg Obs. (1623) Vivian 1948 PL1951 EG 21954 SA1955 YC1960 WP1965 QB1965 UW1973 GG Vivian Hirst(daughter of an astronomer) main-beltThemis 4 September 2017 (JD 2458000.5) 0 68.64 yr (25,070 days) 3.6317 AU 2.6542 AU 3.1429 AU 0.1555 5.57 yr (2,035 days) 72.044° 0.1769 ms / day 2.4903° 115.62° 316.97° 24.77 6.52 km25.82 km (calculated)27.851 0.351 km29.98 1.74 km 20.5209 0.0007 h20.5235 h 0.075 0.0120.078 0.0100.08 (assumed)0.08 0.07 C 11.0011.2011.2411.26 0.2211.3 1623 Vivian (provisional designation 1948 PL) is a carbonaceous Themis asteroid from the outer region of the asteroid belt, approximately 25 kilometers in diameter. It was discovered on 9 August 1948, by South African astronomer Ernest Johnson at Johannesburg Observatory in South Africa. It was named after Vivian Hirst, daughter of British astronomer William P. Hirst. Orbit and classification Vivian is a C-type asteroid and member of the Themis family, a large family of asteroids with nearly coplanar ecliptical orbits. It orbits the Sun in the outer main-belt at a distance of 2.7–3.6 AU once every 5 years and 7 months (2,035 days). Its orbit has an eccentricity of 0.16 and an inclination of 2° with respect to the ecliptic. Vivian's observation arc begins with its official discovery observation, as no precoveries were taken, and no prior identifications were made. Rotation period and pole In March 2006, a rotational lightcurve of Vivian was obtained by American astronomer Lawrence Molnar at the Calvin–Rehoboth Observatory in New Mexico. It gave it a rotation period of 20.5209 hours with a brightness variation of 0.85 magnitude (U=3-). Modeled lightcurve data gave a concurring period of 20.5235 hours (U=n.a.). Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Vivian measures between 24.77 and 29.98 kilometers in diameter, and its surface has an albedo between 0.075 and 0.08. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.08 and calculates a diameter of 25.82 kilometers with an absolute magnitude of 11.3. Naming This minor planet was named in honor of Vivian Hirst, daughter of British astronomer William P. Hirst, receiver of the Astronomical Society of Southern Africa's Gill Medal and after whom the minor planet 3172 Hirst is named. Hirst calculated the preliminary orbit for this and several other minor planets discovered by Ernest Johnson. The official 1623 naming citation was published by the Minor Planet Center on 1 January 1974 (M.P.C. 3569). References 2017-03-30 last obs. JPL Small-Body Database Browser: 1623 Vivian (1948 PL) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001623 Jet Propulsion Laboratory 30 June 2017 Dictionary of Minor Planet Names – (1623) Vivian Schmadel Lutz D. Springer Berlin Heidelberg 129 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1624 (1623) Vivian 1623 Vivian (1948 PL) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1623 28 December 2016 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 2009dmpn.book.....S 1623 28 December 2016 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 (online, AcuA catalog p. 153) 6 Joseph R. Masiero A. K. Mainzer T. Grav J. M. Bauer R. M. Cutri C. Nugent M. S. Cabrera November 2012 Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M The Astrophysical Journal Letters 759 1 5 2012ApJ...759L...8M 10.1088/2041-8205/759/1/L8 1209.5794 46350317 28 December 2016 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 6 Lawrence A. Molnar Melissa J. Haegert Christopher N. Beaumont Marjorie J. Block Timothy H. Brom Andrew R. Butler Peter L. Cook Allyson G. Green Joshua P. Holtrop Kathleen M. Hoogeboom Jason J. Kulisek Jonathan S. Lovelace Jeffrey S. Olivero Achyut Shrestha Jessie F. Taylor Kenneth D. Todd John D. Vander Heide Samuel O. van Coter March 2008 Lightcurve Analysis of a Magnitude Limited Asteroid Sample http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35....9M The Minor Planet Bulletin 35 1 9–12 1052-8091 2008MPBu...35....9M 28 December 2016 6 J. Hanus M. Broz J. Durech B. D. Warner J. Brinsfield R. Durkee D. Higgins R. A. Koff J. Oey F. Pilcher R. Stephens L. P. Strabla Q. Ulisse R. Girelli November 2013 An anisotropic distribution of spin vectors in asteroid families http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013A&A...559A.134H Astronomy and Astrophysics 559 19 2013A&A...559A.134H 10.1051/0004-6361/201321993 1309.4296 119214895 28 December 2016 J. Durech J. Hanus D. Oszkiewicz R. Vanco March 2016 Asteroid models from the Lowell photometric database http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...587A..48D Astronomy and Astrophysics 587 6 2016A&A...587A..48D 10.1051/0004-6361/201527573 1601.02909 118427201 28 December 2016 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 53493339 28 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 1623 1622 Chacornac 1623 1624 Rabe 001623 Category:Discoveries by Ernest Leonard Johnson Category:Named minor planets 19480809