1604 Tombaugh

Type Eos asteroid October 2019 yes 1604 Tombaugh #D6D6D6 001604-asteroid shape model (1604) Tombaugh.png Shape model of Tombaugh from its lightcurve 24 March 1931 C. O. Lampland Lowell Obs. (1604) Tombaugh 1931 FH1930 DX1933 SA 11936 FA1937 JH1941 CF1943 OE1948 ME1949 ST 1A920 EC Clyde Tombaugh(astronomer) main-beltEos 4 September 2017 (JD 2458000.5) 0 96.51 yr (35,252 days) 3.3309 AU 2.7161 AU 3.0235 AU 0.1017 5.26 yr (1,920 days) 359.39° 0.1875 ms / day 9.3941° 309.10° 38.199° 28.78 0.53 km32.25 km (derived)32.33 2.2 km (IRAS:3) 6.15 h (dated)7.04 h (dated)7.047 0.004 h7.056 0.001 h8.2 h (dated) 0.0933 (derived)0.1038 0.016 (IRAS:3)0.138 0.006 B–V = 0.751U–B = 0.373XSCU (Tholen)Xc (SMASS)X 10.410.5310.6510.93 0.15 1604 Tombaugh, provisional designation 1931 FH, is a rare-type Eos asteroid from the outer region of the asteroid belt, approximately 32 kilometers in diameter. It was discovered on 24 March 1931, by American astronomer Carl Otto Lampland at Lowell Observatory in Flagstaff, Arizona, in the United States. It was named after the discoverer of Pluto, Clyde Tombaugh. Classification and orbit Tombaugh is a member of the Eos family that orbits the Sun in the outer main-belt at a distance of 2.7–3.3 AU once every 5 years and 3 months (1,920 days). Its orbit has an eccentricity of 0.10 and an inclination of 9° with respect to the ecliptic. Its observation arc begins at Flagstaff, one year prior to its official discovery observation at Lowell Observatory. It had been previously identified at Heidelberg as A920 EC in 1920, and as 1930 DX in 1930. Physical characteristics Tombaugh is classified as an X-type asteroid. It is also classified as a rare XSCU type in the Tholen, and as a transitional Xc type in the SMASS taxonomy. Rotation period In April 2010 and November 2012, rotational lightcurves of Tombaugh were obtained from photometric observations at Oakley Southern Sky Observatory, Australia, and at Bassano Bresciano Observatory, Italy. Lightcurve analysis gave a rotation period of 7.047 and 7.056 hours with a brightness variation of 0.16 and 0.35 magnitude, respectively (U=2+/2+). These periods supersede previous results obtained by astronomers Claes-Ingvar Lagerkvist (1975), Richard P. Binzel (1984) and Krisztián Sárneczky (U=1/2/2). Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS and the Japanese Akari satellite, Tombaugh measures 28.78 and 32.33 kilometers in diameter, and its surface has an albedo of 0.138 and 0.104, respectively. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0933 and a diameter of 32.25 kilometers with an absolute magnitude of 10.65. Naming This minor planet was named for American astronomer Clyde Tombaugh (1906–1997), famous for his discovery of Pluto in 1930. The discovering Lowell Observatory named this asteroid on the occasion of a symposium on Pluto, held in 1980. When Tombaugh examined the photographic plates during the trans-Saturnian search program at the Lowell Observatory, he also marked over 4,000 minor planets on these plates. The approved naming citation was published by the Minor Planet Center on 1 April 1980 (M.P.C. 5280). References 2016-09-14 last obs. JPL Small-Body Database Browser: 1604 Tombaugh (1931 FH) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001604 Jet Propulsion Laboratory 30 June 2017 Dictionary of Minor Planet Names – (1604) Tombaugh Schmadel Lutz D. Springer Berlin Heidelberg 127 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1605 (1604) Tombaugh 1604 Tombaugh (1931 FH) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1604 29 December 2016 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 29 December 2016 1604 29 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 12 IRAS-A-FPA-3-RDR-IMPS-V6.0 2004PDSS...12.....T 22 October 2019 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 free (online, AcuA catalog p. 153) Lagerkvist, C.-I. March 1978 Photographic photometry of 110 main-belt asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1978A&AS...31..361L Astronomy and Astrophysics Supplement Series 31 361–381 1978A&AS...31..361L 29 December 2016 Binzel, R. P. October 1987 A photoelectric survey of 130 asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1987Icar...72..135B Icarus 72 1 135–208 0019-1035 1987Icar...72..135B 10.1016/0019-1035(87)90125-4 29 December 2016 K. Sárneczky Gy. Szabó L. L. Kiss June 1999 CCD observations of 11 faint asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1999A&AS..137..363S Astronomy and Astrophysics Supplement 137 2 363–368 1999A&AS..137..363S 10.1051/aas:1999251 29 December 2016 free 6 Kenda Albers Katherine Kragh Adam Monnier Zachary Pligge Kellen Stolze Josh West Arnold Yim Richard Ditteon October 2010 Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2009 October thru 2010 April http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010MPBu...37..152A The Minor Planet Bulletin 37 4 152–158 1052-8091 2010MPBu...37..152A 29 December 2016 Luca Strabla Ulisse Quadri Robert Girelli April 2013 Asteroid Observed from Bassano Bresciano Observatory 2012 August–September http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013MPBu...40...83S The Minor Planet Bulletin 40 2 83–84 1052-8091 2013MPBu...40...83S 29 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 29 December 2016 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/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 1604 1603 Neva 1604 1605 Milankovitch 001604 Category:Discoveries by Carl Otto Lampland 001604 Category:Named minor planets 001604 001604 19310324