1061 Paeonia

Main-belt asteroid March 2018 yes 1061 Paeonia #D6D6D6 001061-asteroid shape model (1061) Paeonia.png Modelled shape of Paeonia from its lightcurve K. Reinmuth Heidelberg Obs. 10 October 1925 (1061) Paeonia 1925 TB1925 XB1936 SM1942 XD p iː ' oʊ n i @paeonia peony (flowering plant) main-belt(outer)Themisbackground 23 March 2018 (JD 2458200.5) 0 91.72 yr (33,502 d) 3.7986 AU 2.4505 AU 3.1245 AU 0.2157 5.52 yr (2,017 d) 249.51° 0.1785 ms / day 2.4993° 90.923° 306.27° 17.95 km (calculated)18.63 5.52 km23.092 0.151 km 6 h (at least)7.9971 0.0001 hlightcurve-plot-Pilcher7.99710 0.00001 h 0.048 0.0070.0483 0.00700.08 (assumed)0.09 0.06 Tholen CB–V 0.676U–B 0.337 11.8012.01 0.2912.09 1061 Paeonia, provisional designation 1925 TB, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 19 km mi on us in diameter. It was discovered on 10 October 1925, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Heidelberg, Germany. The C-type asteroid has a rotation period of 8 hours and is likely very elongated. It was named after the flowering plant Paeonia, commonly known as peony. Orbit and classification Paeonia is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. Based on osculating Keplerian orbital elements, the asteroid has also been classified as a member of the Themis family (602), a very large family of carbonaceous asteroids, named after 24 Themis. It orbits the Sun in the outer asteroid belt at a distance of 2.5–3.8 AU once every 5 years and 6 months (2,017 days; semi-major axis of 3.12 AU). Its orbit has an eccentricity of 0.22 and an inclination of 2° with respect to the ecliptic. The asteroid was first observed at the Simeiz Observatory in September 1925. The body's observation arc begins at Yerkes Observatory in November 1925, or one month after its official discovery observation at Heidelberg. Naming This minor planet was named after the genus of flowering plants, Paeonia, which comprises all perennial peony plants. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 101). Reinmuth's flowers Due to his many discoveries, Karl Reinmuth submitted a large list of 66 newly named asteroids in the early 1930s. The list covered his discoveries with numbers between 1009 (1009) and 1200 (1200). This list also contained a sequence of 28 asteroids, starting with 1054 Forsytia, that were all named after plants, in particular flowering plants (also see list of minor planets named after animals and plants). Physical characteristics In the Tholen classification, Paeonia is a common, carbonaceous C-type asteroid, which agrees with the overall spectral type for the Themistians.23 Rotation period and pole In December 1986, a rotational lightcurve of Paeonia was obtained from photometric observations by American physicist Frederick Pilcher at Illinois College. Lightcurve analysis gave a rotation period of at least 6 hours with a brightness amplitude of 0.5 magnitude (U=2-). Only a lower limit could be determined due to the short observation period. The observer noted that the brightness variation occurred within 2 hours or less. In 2014, Pilcher revisited Paeonia at his Organ Mesa Observatory G50 and measured a refined period of 7.9971 hours with an amplitude of 1.00 magnitude (U=n.a.), a strong indication for an elongated shape.lightcurve-plot-Pilcher A modeled lightcurve using photometric data from the Lowell Photometric Database was published in 2016. It gave an identical sidereal period of 7.9971 hours, as well as a spin axis at (155.0°, −50.0°) in ecliptic coordinates (λ, β). Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Paeonia measures between 18.63 and 23.092 kilometers in diameter and its surface has an albedo between 0.048 and 0.09. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.08 and calculates a diameter of 17.95 kilometers based on an absolute magnitude of 12.09. Notes lightcurve-plot-Pilcher Pilcher (2014) lightcurve plot of (1061) Paeonia period 7.9971 0.0001 hours with a brightness amplitude of 1.00 mag. Observation from 27 November to 29 December 2014. Quality code of n/a. List of Pilcher's lightcurve plots at the ASLC-website. References 30em 2017-07-01 last obs. JPL Small-Body Database Browser: 1061 Paeonia (1925 TB) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001061 Jet Propulsion Laboratory 21 March 2018 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg (1061) Paeonia 91 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1062 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 90 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1055 (1054) Forsytia 1061 Paeonia (1925 TB) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1061 21 March 2018 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 21 March 2018 Asteroid 1061 Paeonia – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1061 28 October 2019 D. Nesvorný M. Broz V. Carruba December 2014 Identification and Dynamical Properties of Asteroid Families Asteroids IV 297–321 2015aste.book..297N 10.2458/azu_uapress_9780816532131-ch016 1502.01628 978-0-8165-3213-1 1061 21 March 2018 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 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 Pilcher F. September 1987 General Report of Position Observations by the ALPO Minor Planets Section for the Year 1986 Minor Planet Bulletin http://www.minorplanet.info/MPB/issues/MPB_14-1.pdf 14 1 23 1987MPBu...14...23P 12 March 2020 3 October 2020 https://web.archive.org/web/20201003192125/http://www.minorplanet.info/MPB/issues/MPB_14-1.pdf Ďurech J. Hanuš J. Oszkiewicz D. Vančo R. March 2016 Asteroid models from the Lowell photometric database Astronomy and Astrophysics 587 A48 2016A&A...587A..48D 0004-6361 10.1051/0004-6361/201527573 1601.02909 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 21 March 2018 External links Lightcurve Database Query (LCDB), at www.minorplanet.info 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 – Geneva Observatory, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1061 1060 Magnolia 1061 1062 Ljuba 001061 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 001061 19251010