1998 Titius

Metallic-carbonaceous main-belt asteroid October 2019 yes 1998 Titius #D6D6D6 24 February 1938 A. Bohrmann Heidelberg Obs. (1998) Titius 1938 DX 11966 TF Johann Titius (astronomer) main-belt(inner) 4 September 2017 (JD 2458000.5) 0 79.27 yr (28,955 days) 2.5750 AU 2.2643 AU 2.4196 AU 0.0642 3.76 yr (1,375 days) 335.11° 0.2619 ms / day 7.6265° 351.78° 246.70° 10.79 km (calculated)14.24 0.17 km14.782 0.081 km15.98 0.35 km 6.13 0.01 h 0.093 0.0040.1066 0.00370.126 0.0310.20 (assumed) SMASS = XcMCX 12.1012.15 0.2212.2 1998 Titius, provisional designation 1938 DX 1, is a metallic–carbonaceous asteroid from the inner regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered on 24 February 1938, by German astronomer Alfred Bohrmann at Heidelberg Observatory in southern Germany. On the same night, the body was also observed at the Finnish Turku Observatory. It was later named after astronomer Johann Daniel Titius. Orbit and classification Titius orbits the Sun in the inner main-belt at a distance of 2.3–2.6 AU once every 3 years and 9 months (1,375 days). Its orbit has an eccentricity of 0.06 and an inclination of 8° with respect to the ecliptic. It stays in a 2:1 orbital resonance with the planet Mars. Titiuss observation arc starts on the night following its official discovery observation. Physical characteristics Diameter and albedo According to observations carried out by the Japanese Akari and NASA's Wide-field Infrared Survey Explorer (WISE) with its subsequent NEOWISE mission, Titius has an albedo between 0.093 and 0.126, and its diameter measures between 14.2 and 16.0 kilometers. The Collaborative Asteroid Lightcurve Link assumes a standard albedo of 0.20 and calculates a diameter of 10.8 kilometers with an absolute magnitude of 12.2. Spectral type Its spectral classification is that of a Xc-type asteroid in the SMASS taxonomy, a transitional spectral type between the two large main groups of metallic X-type and carbonaceous C-type asteroids. Both types are much darker than the stony S-type asteroids, which are also very common in the inner main-belt. In addition, Titius is also classified as a M-type asteroid by WISE. Rotation period A rotational lightcurve of Titius was obtained from photometric observations by American astronomer Robert Stephens at the Californian Santana Observatory in March 2002. Lightcurve analysis gave a rotation period of 6.13 0.01 hours, during which its brightness amplitude varies by 0.30 0.04 magnitude (U=3). Naming This minor planet was named after German astronomer Johann Daniel Titius (1729–1796), best known for formulating the Titius-Bode law, which states that each subsequent planet in the Solar System is roughly twice as far from the Sun than the previous one. He is also honored by the lunar crater Titius. The official 1998 naming citation was published by the Minor Planet Center on 15 October 1977 (M.P.C. 4237). References 30em 2017-06-05 last obs. JPL Small-Body Database Browser: 1998 Titius (1938 DX1) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001998 Jet Propulsion Laboratory 1 July 2017 Dictionary of Minor Planet Names – (1998) Titius Schmadel Lutz D. Springer Berlin Heidelberg 162 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1999 (1998) Titius 1998 Titius (1938 DX1) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1998 8 December 2016 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 1998 8 December 2016 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) 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 8 December 2016 Stephens, R. D. September 2002 Photometry of 973 Aralia, 1189 Terentia, 1040 Klumpkea, and 1998 Titius http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002MPBu...29...47S The Minor Planet Bulletin 29 47–48 2002MPBu...29...47S 8 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 8 December 2016 Gallardo, Tabaré Venturini, Julia Roig, Fernando Gil-Hutton, Ricardo August 2011 Origin and sustainability of the population of asteroids captured in the exterior resonance 1:2 with Mars http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011Icar..214..632G Icarus 214 2 632–644 2011Icar..214..632G 10.1016/j.icarus.2011.05.029 1105.5108 15 December 2015 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 1998 1997 Leverrier 1998 1999 Hirayama 001998 Category:Discoveries by Alfred Bohrmann Category:Named minor planets 001998 19380224