1552 Bessel

Main-belt asteroid October 2019 yes 1552 Bessel #D6D6D6 001552-asteroid shape model (1552) Bessel.png Shape model of Bessel from its lightcurve 24 February 1938 Y. Väisälä Turku Observatory (1552) Bessel 1938 DE 11933 FJ 11948 EH1951 UF Friedrich Bessel(German astronomer) main-beltEos 4 September 2017 (JD 2458000.5) 0 84.11 yr (30,722 days) 3.3068 AU 2.7174 AU 3.0121 AU 0.0978 5.23 yr (1,909 days) 185.26° 0.1885 ms / day 9.8367° 9.9835° 39.607° 16.63 0.84 km18.33 km (derived)18.514 0.066 km18.817 0.101 km 8.96318 0.00002 hLCDB-Hanus-2016d8.996 0.006 h 0.1448 (derived)0.1514 0.03320.156 0.0230.193 0.024 S 11.311.411.53 0.24 1552 Bessel (provisional designation 1938 DE 1) is a stony Eoan asteroid from the outer regions of the asteroid belt, approximately 18 kilometers in diameter. It was discovered on 24 February 1938, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, and named after German astronomer Friedrich Bessel. Orbit and classification Bessel is a stony asteroid and a member of the Eos family that orbits the Sun in the outer main-belt at a distance of 2.7–3.3 AU once every 5 years and 3 months (1,909 days). Its orbit has an eccentricity of 0.10 and an inclination of 10° with respect to the ecliptic. First observed as 1933 FJ 1 at Heidelberg in 1933, the body's observation arc begins at Turku, 5 days prior to its official discovery observation. Naming This minor planet was named after German astronomer Friedrich Wilhelm Bessel (1789–1846), who measured the first stellar parallax in 1838. His measured parallax of 0.314 arcseconds for 61 Cygni gave a distance of 10.3 light-years, which is 9.6% off today's measured distance of 11.4 light-years. Bessel is also honored by the lunar crater Bessel. The official 1552 naming citation was published by the Minor Planet Center on 30 January 1964 (M.P.C. 2278). Physical characteristics Rotation period and pole In March 2011, a rotational lightcurve of Bessel was obtained from photometric observations by Italian amateur astronomer Silvano Casulli. Lightcurve analysis gave a well-defined rotation period of 8.996 hours with a brightness variation of 0.29 magnitude (U=3). In 2016, a modeled lightcurve using photometric data from various sources gave a concurring period of 8.96318 hours, as well as a spin axis of (61.0°, −50.0°) in ecliptic coordinates (λ, β).LCDB-Hanus-2016d Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Bessel measures between 16.63 and 18.817 kilometers in diameter, and its surface has an albedo between 0.1514 and 0.193. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1448 and a diameter of 18.33 kilometers with an absolute magnitude of 11.4. Notes LCDB-Hanus-2016d Hanus (2016) web: rotation period of 8.96318 hours. (λ, β)-Pole axis of (61.0°, −50.0°) and (221.0°, −57.0°) . Summary figures at http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1552%7CBessel Collaborative Asteroid Lightcurve Link (CALL) for (1552) Bessel References 30em 2017-05-05 last obs. JPL Small-Body Database Browser: 1552 Bessel (1938 DE1) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001552 Jet Propulsion Laboratory 30 June 2017 Dictionary of Minor Planet Names – (1552) Bessel Schmadel Lutz D. Springer Berlin Heidelberg 123 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1553 (1552) Bessel 1552 Bessel (1938 DE1) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1552 11 April 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 Asteroids and comets rotation curves – (1552) Bessel Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001552 11 April 2017 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001552 dead Friedrich Wilhelm Bessel (July 22, 1784 - March 17, 1846) seds.org http://messier.seds.org/xtra/Bios/bessel.html 11 April 2017 dead https://web.archive.org/web/20120204150631/http://messier.seds.org/xtra/Bios/bessel.html 4 February 2012 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 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 11 April 2017 1552 11 April 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 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 11 April 2017 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 11 April 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 1552 1551 Argelander 1552 1553 Bauersfelda 001552 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 19380224