1743 Schmidt

Asteroid December 2018 yes 1743 Schmidt #D6D6D6 001743-asteroid shape model (1743) Schmidt.png Shape model of Schmidt from its lightcurve C. J. van HoutenI. van Houten-G.T. Gehrels Palomar Obs. 24 September 1960 (1743) Schmidt 4109 P-L1931 BJ1939 CN1943 EA1947 GD1951 JU1952 QD Bernhard Schmidt(German optician) main-belt(inner)background 27 April 2019 (JD 2458600.5) 0 87.76 yr (32,056 d) 2.8066 AU 2.1405 AU 2.4736 AU 0.1346 3.89 yr (1,421 d) 202.34° 0.2533 ms / day 6.3568° 189.64° 359.51° 17.00 - 17.01 km17.28 1.4 km18.230 6.626 km19.062 0.133 km19.338 0.105 km20.69 0.31 km20.78 0.43 km 17.45 h 0.0420.0450.04950.05020.0570.060.0603 C (SMASS-I)B–V 0.620U–B 0.260 12.4712.48 1743 Schmidt, provisional designation 4109 P-L, is a dark background asteroid from the inner regions of the asteroid belt, approximately 19 km mi off 2 us in diameter. It was discovered during the Palomar–Leiden survey on 24 September 1960, by astronomers Ingrid and Cornelis van Houten at Leiden, on photographic plates taken by Tom Gehrels at Palomar Observatory in California. The C-type asteroid has a rotation period of 17.5 hours. It was named for the optician Bernhard Schmidt. Orbit and classification Schmidt is a non-family asteroid from the main belt's background population. As it is located in the dynamical region of the Vesta family, the asteroid is potentially a Vestian interloper due to its completely different spectral type. It orbits the Sun in the inner asteroid belt at a distance of 2.1–2.8 AU once every 3 years and 11 months (1,421 days; semi-major axis of 2.47 AU). Its orbit has an eccentricity of 0.13 and an inclination of 6° with respect to the ecliptic. The body's observation arc begins with its first observation as 1931 BJ at the Lowell Observatory in January 1931, more than 29 years prior to its official discovery observation at Palomar Observatory. Palomar–Leiden survey The survey designation "P-L" stands for "Palomar–Leiden", named after the Palomar and Leiden Observatory, which collaborated on the fruitful Palomar–Leiden survey in the 1960s. Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Ingrid and Cornelis van Houten at Leiden Observatory where astrometry was carried out. The trio are credited with the discovery of several thousand asteroid discoveries. Naming This minor planet was named after Estonian-German optician and astronomer Bernhard Schmidt (1879–1935), who invented the Schmidt camera, a telescope design with a spherical primary mirror and an aspherical correcting lens, providing a wide field of view with little optical aberrations. Proposed by Paul Herget, the asteroid's official 1743 naming citation was published by the Minor Planet Center on 15 August 1970 (M.P.C. 3086). Physical characteristics Schmidt is a common carbonaceous C-type asteroid as determined during the first phase of the Small Main-Belt Asteroid Spectroscopic Survey. Rotation period and poles In September 1983, a rotational lightcurve of Schmidt was obtained from photometric observations by Richard Binzel. Lightcurve analysis gave a rotation period of 17.45 hours with a brightness amplitude of 0.36 magnitude (U=3). A modeled lightcurve using photometric data from the Lowell Photometric Database was published in 2016. It gave a concurring period of 17.4599 0.0001 hours, as well as two spin axes at (69.0°, −62.0°) and (261.0°, −53.0°) in ecliptic coordinates (λ, β). Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Schmidt measures between 17.00 and 20.78 kilometers in diameter and its surface has an albedo between 0.042 and 0.0603. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0603 and a diameter of 17.28 kilometers based on an absolute magnitude of 12.48. References 30em 2018-10-22 last obs. JPL Small-Body Database Browser: 1743 Schmidt (4109 P-L) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001743 https://web.archive.org/web/20200820185525/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001743 dead 20 August 2020 Jet Propulsion Laboratory 7 December 2018 Dictionary of Minor Planet Names – (1743) Schmidt Schmadel Lutz D. Springer Berlin Heidelberg 138 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1744 (1743) Schmidt 1743 Schmidt (4109 P-L) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1743 7 December 2018 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 2009 2009dmpn.book.....S https://cds.cern.ch/record/1339661 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 The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 119293330 Asteroid (1743) Schmidt – Proper elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=1743&pc=1.1.6 4 December 2018 Asteroid 1743 Schmidt Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1743+Schmidt 7 December 2018 https://web.archive.org/web/20181209123942/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1743+Schmidt 9 December 2018 dead Minor Planet Discoverers Minor Planet Center https://www.minorplanetcenter.net/iau/lists/MPDiscsNum.html 2018 7 December 2018 1743 7 December 2018 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 The Astrophysical Journal Letters 759 1 5 2012ApJ...759L...8M 10.1088/2041-8205/759/1/L8 1209.5794 46350317 6 C. R. Nugent A. Mainzer J. Masiero J. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett R. Stevenson E. L. Wright December 2015 NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos The Astrophysical Journal 814 2 13 2015ApJ...814..117N 10.1088/0004-637X/814/2/117 1509.02522 9341381 6 A. K. Mainzer J. M. Bauer R. M. Cutri T. Grav E. A. Kramer J. R. Masiero C. R. Nugent S. M. Sonnett R. A. Stevenson E. L. Wright June 2016 NEOWISE Diameters and Albedos V1.0 https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_COMPIL_5_NEOWISEDIAM_V1_0/data/neowise_mainbelt.tab NASA Planetary Data System EAR–A–COMPIL–5–NEOWISEDIAM–V1.0 2016PDSS..247.....M 7 December 2018 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 Joseph R. Masiero C. Nugent A. K. Mainzer E. L. Wright J. M. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett October 2017 NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos The Astronomical Journal 154 4 10 2017AJ....154..168M 10.3847/1538-3881/aa89ec 1708.09504 250780308 free 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) 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 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 35447010 (catalog) Binzel, R. P. October 1987 A photoelectric survey of 130 asteroids Icarus 72 1 135–208 0019-1035 1987Icar...72..135B 10.1016/0019-1035(87)90125-4 J. Durech J. Hanus D. Oszkiewicz R. Vanco March 2016 Asteroid models from the Lowell photometric database Astronomy and Astrophysics 587 6 2016A&A...587A..48D 10.1051/0004-6361/201527573 1601.02909 118427201 External links Biography – Bernhard Schmidt https://web.archive.org/web/20211030054729/http://www.plicht.de/chris/bio01.htm 30 October 2021 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 1743 1742 Schaifers 1743 1744 Harriet 001743 Category:Discoveries by Cornelis Johannes van Houten Category:Discoveries by Ingrid van Houten-Groeneveld Category:Discoveries by Tom Gehrels 4109 Category:Named minor planets 19600924