1719 Jens

Main-belt asteroid October 2019 yes 1719 Jens #D6D6D6 001719-asteroid shape model (1719) Jens.png Shape model of Jens from its lightcurve 17 February 1950 K. Reinmuth Heidelberg Obs. (1719) Jens 1950 DP1939 PP1939 TD1941 BB1948 RQ1948 RS 11948 TS 11961 TZ 1A922 SC Jens (discoverer's grandson) main-belt(middle) 4 September 2017 (JD 2458000.5) 0 68.65 yr (25,074 days) 3.2474 AU 2.0649 AU 2.6562 AU 0.2226 4.33 yr (1,581 days) 321.62° 0.2277 ms / day 14.281° 323.44° 58.096° 18.76 km (derived)18.93 0.9 km19.77 0.76 km19.914 0.070 km21.610 0.086 5.867 0.005 h5.87 0.01 h5.87016 0.00005 h5.873 0.005 h 0.085 0.0110.1048 (derived)0.1348 0.03060.137 0.0210.1489 0.015 CS 11.311.712.04 1.20 1719 Jens (prov. designation: 1950 DP) is a background asteroid from the central region of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 17 February 1950, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany. It was named after a grandson of the discoverer. Orbit and classification thumb|200px|left|Jens (yellow-green dots) transists near the center of the Tadpole Nebula. Jens orbits the Sun in the central main-belt at a distance of 2.1–3.2 AU once every 4 years and 4 months (1,581 days). Its orbit has an eccentricity of 0.22 and an inclination of 14° with respect to the ecliptic. First identified as A922 SC at Simeiz Observatory in 1922, Jens first used observation was taken at Turku in 1948, extending the body's observation arc by 2 years prior to its official discovery observation. In 2010, Jens was passing in front of the Tadpole Nebula (see image obtained by WISE). Physical characteristics Lightcurves In September 2000, American astronomer Brian Warner obtained two rotational lightcurves, giving a rotation period of 5.867 and 5.87 hours with a brightness variation of 0.50 and 0.55 magnitude, respectively (U=3/3). In February 2006, photometric observations by French amateur astronomer Laurent Bernasconi gave a concurring period of 5.873 hours with an amplitude of 0.55 magnitude (U=3). This well-defined period was further confirmed by a modeled light-curve using data from the Lowell Photometric Database, giving a period of 5.87016 hours (U=n.a.). Spectral type It is classified as S- and C-type asteroid by the LCDB and Pan-STARRS, respectively. Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Jens measures between 18.93 and 21.61 kilometers in diameter and its surface has an albedo between 0.085 and 0.149. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1048 and calculates a diameter of 18.76 kilometers based on an absolute magnitude of 11.7. Naming This minor planet was named by the discoverer for his grandson. Karl Reinmuth also named the consecutively numbered asteroid, 1720 Niels, after one of his grandsons. The official 1719 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3933). References 30em 2017-05-05 last obs. JPL Small-Body Database Browser: 1719 Jens (1950 DP) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001719 Jet Propulsion Laboratory 7 June 2017 Dictionary of Minor Planet Names – (1719) Jens Schmadel Lutz D. Springer Berlin Heidelberg 136 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1720 (1719) Jens 1719 Jens (1950 DP) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1719 22 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 – (1719) Jens Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001719 22 December 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001719 dead Asteroid Caught Marching Across Tadpole Nebula JPL Photojournal 13 May 2010 http://photojournal.jpl.nasa.gov/catalog/PIA13110 15 November 2015 1719 22 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 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 22 December 2016 Warner, B. March 2001 Asteroid Photometry at the Palmer Divide Observatory: Results for 706 Hirundo, 957 Camelia, and 1719 Jens http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2001MPBu...28....4W The Minor Planet Bulletin 28 4–5 2001MPBu...28....4W 22 December 2016 Warner, Brian D. January 2011 Upon Further Review: V. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011MPBu...38...63W The Minor Planet Bulletin 38 1 63–65 1052-8091 2011MPBu...38...63W 22 December 2016 6 Hanus, J. Durech, J. Broz, M. Warner, B. D. Pilcher, F. Stephens, R. Oey, J. Bernasconi, L. Casulli, S. Behrend, R. Polishook, D. Henych, T. Lehký, M. Yoshida, F. Ito, T. June 2011 A study of asteroid pole-latitude distribution based on an extended set of shape models derived by the lightcurve inversion method http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011A&A...530A.134H Astronomy & Astrophysics 530 16 2011A&A...530A.134H 10.1051/0004-6361/201116738 1104.4114 22 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 22 December 2016 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 22 December 2016 External links Lightcurve plot of 1719 Jens, Palmer Divide Observatory, B. D. Warner (2000) 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 1719 1718 Namibia 1719 1720 Niels 001719 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 19500217