1335 Demoulina

Stony Florian asteroid from the inner regions of the asteroid belt October 2019 yes 1335 Demoulina #D6D6D6 001335-asteroid shape model (1335) Demoulina.png Shape model of Demoulina from its lightcurve K. Reinmuth Heidelberg Obs. 7 September 1934 (1335) Demoulina 1934 RE1954 RA Prof. Demoulin(Belgian astronomer) main-belt(inner)Florabackground 4 September 2017 (JD 2458000.5) 0 82.66 yr (30,191 days) 2.5854 AU 1.8955 AU 2.2404 AU 0.1540 3.35 yr (1,225 days) 255.64° 0.2939 ms / day 2.5472° 172.62° 198.89° 6.35 1.43 km7.47 km (calculated)7.484 0.130 km7.684 0.133 km 2.59 0.05 h (poor)74.86 0.10 h 0.2073 0.02750.218 0.0430.24 (assumed)0.26 0.14 S (assumed) 12.812.913.0613.89 0.74 1335 Demoulina, provisional designation 1934 RE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. Discovered by Karl Reinmuth at Heidelberg Observatory in 1934, the asteroid was named after Prof. Demoulin, a Belgian astronomer at Ghent University. It has a slower-than average spin rate of nearly 75 hours. Discovery Demoulina was discovered on 7 September 1934, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. Six nights later, it was independently discovered by Belgian astronomer Eugène Delporte at Uccle Observatory on 13 September 1934. The Minor Planet Center only recognizes the first discoverer. Orbit and classification Demoulina is a member of the Flora family (402), a giant asteroid family and the largest family of stony asteroids in the asteroid belt. However, it is a non-family asteroid of the main belt's background population when applying the Hierarchical Clustering Method to its proper orbital elements. It orbits the Sun in the inner asteroid belt at a distance of 1.9–2.6 AU once every 3 years and 4 months (1,225 days; semi-major axis of 2.24 AU). Its orbit has an eccentricity of 0.15 and an inclination of 3° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Heidelberg in 1934. Physical characteristics Demoulina is an assumed S-type asteroid. Rotation period In February 2006, a rotational lightcurve of Demoulina was obtained from photometric observations by American astronomers Lawrence Molnar and Melissa Haegert at the Calvin–Rehoboth Observatory in New Mexico. Lightcurve analysis gave a rotation period of 74.86 hours with a brightness amplitude of 0.78 magnitude (U=2+). While not being a slow rotator, Demoulinas period is significantly longer than that for most asteroids. Its high brightness amplitude also indicates that it has an irregular or elongated shape. Other photometric lightcurves which are based on a single night of observation are rated poorly (U=1). Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Demoulina measures between 6.35 and 7.684 kilometers in diameter and its surface has an albedo between 0.2073 and 0.26. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the parent body of the Flora family, and calculates a diameter of 7.47 kilometers based on an absolute magnitude of 12.8. Naming This minor planet was named after Prof. Demoulin, a Belgian astronomer at Ghent University. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 121). References 30em 2017-05-05 last obs. JPL Small-Body Database Browser: 1335 Demoulina (1934 RE) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001335 Jet Propulsion Laboratory 29 November 2017 Dictionary of Minor Planet Names – (1335) Demoulina Schmadel Lutz D. Springer Berlin Heidelberg 109 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1336 (1335) Demoulina 1335 Demoulina (1934 RE) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1335 29 November 2017 Asteroids and comets rotation curves – (1335) Demoulina Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001335 29 November 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001335 dead 6 Joseph R. Masiero A. K. Mainzer T. Grav J. M. Bauer R. M. Cutri J. Dailey P. R. M. Eisenhardt R. S. McMillan T. B. Spahr M. F. Skrutskie D. Tholen R. G. Walker E. L. Wright E. DeBaun D. Elsbury T. IV Gautier S. Gomillion A. Wilkins November 2011 Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M The Astrophysical Journal 741 2 20 2011ApJ...741...68M 10.1088/0004-637X/741/2/68 1109.4096 118745497 29 November 2017 Asteroid 1335 Demoulina – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1335 29 October 2019 1335 29 November 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 35447010 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 Lawrence A. Molnar Melissa J. Haegert December 2007 Lightcurve Analysis of Five Main-belt Asteroids at the Calvin-Rehoboth Observatory http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2007MPBu...34..126M The Minor Planet Bulletin 34 4 126–128 1052-8091 2007MPBu...34..126M 29 November 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 53493339 29 November 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 1335 1334 Lundmarka 1335 1336 Zeelandia 001335 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 19340907