Asteroid
1550 Tito (provisional designation1937 WD asteroid from the middle region of theasteroid belt , approximately 12 kilometers in diameter. It was discovered on 29 November 1937, by Serbian astronomerMilorad B. Protić at theBelgrade Astronomical Observatory in Serbia.[ 15] Josip Broz Tito .[ 2]
Classification and orbit [ edit ] Tito orbits the Sun at a distance of 1.7–3.3 AU once every 4 years and 1 month (1,482 days). Its orbit has aneccentricity of 0.31 and aninclination of 9° with respect to theecliptic .[ 1] observation arc begins 4 years after its official discovery observation, with its first used observation taken at Belgrade in 1941. Noprecoveries were taken and no prior identifications were made.[ 15]
Physical characteristics [ edit ] In theSMASS classification , Tito is characterized as a commonS-type asteroid .[ 1]
Tito has arotation period of approximately 54 hours. While this does not make it aslow rotator , it has a significantly longer period than the vast majority of minor planets, which typically spin every 2 to 20 hours around their axis. Rotationallightcurves ofTito were obtained from photometric observations byWalter R. Cooney Jr. in January 2003, who derived a period of 54.2 hours (Δmag 0.23,U=2 [ 12] U=2 [ 11] David Higgins in December 2010, who derived a period of 54.53 hours (Δmag 0.40,U=2 [ 13]
Diameter and albedo [ edit ] According to the surveys carried out by theSpitzer Space Telescope , the JapaneseAkari satellite, and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission, Tito measures between 9.47 and 13.652 kilometers in diameter, and its surface has analbedo between 0.181 and 0.257.[ 3] [ 4] [ 5] [ 6] [ 8] [ 9] [ 10] Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 12.39 kilometers with anabsolute magnitude of 11.9.[ 7]
Tito was named in honour ofJosip Broz Tito (1892–1980), leader of theYugoslavian resistance during theWorld War II , early enthusiast of theUnited Nations , and president of formerYugoslavia .[ 2] naming citation was published by theMinor Planet Center on 30 January 1964 (M.P.C. 2277[ 16]
^a b c d e f "JPL Small-Body Database Browser: 1550 Tito (1937 WD)" (2017-05-05 last obs.).Jet Propulsion Laboratory . Retrieved5 June 2017 .^a b c Schmadel, Lutz D. (2007). "(1550) Tito".Dictionary of Minor Planet Names – (1550) Tito .Springer Berlin Heidelberg . p. 123.doi :10.1007/978-3-540-29925-7_1551 .ISBN 978-3-540-00238-3 ^a b c d Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016)."NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos" .The Astronomical Journal .152 (3): 12.arXiv :1606.08923 Bibcode :2016AJ....152...63N .doi :10.3847/0004-6256/152/3/63 ^a b Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014)."Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos" .The Astrophysical Journal .791 (2): 11.arXiv :1406.6645 Bibcode :2014ApJ...791..121M .doi :10.1088/0004-637X/791/2/121 .S2CID 119293330 . Retrieved30 December 2016 . ^a b c d Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (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.arXiv :1209.5794 Bibcode :2012ApJ...759L...8M .doi :10.1088/2041-8205/759/1/L8 .S2CID 46350317 . Retrieved30 December 2016 . ^a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011)."Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey" .Publications of the Astronomical Society of Japan .63 (5):1117– 1138.Bibcode :2011PASJ...63.1117U .doi :10.1093/pasj/63.5.1117 online ,AcuA catalog p. 153 )^a b c d e "LCDB Data for (1550) Tito" . Asteroid Lightcurve Database (LCDB). Retrieved30 December 2016 .^a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results".The Astrophysical Journal .741 (2): 25.arXiv :1109.6407 Bibcode :2011ApJ...741...90M .doi :10.1088/0004-637X/741/2/90 .S2CID 35447010 . ^a b c d Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015)."NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos" .The Astrophysical Journal .814 (2): 13.arXiv :1509.02522 Bibcode :2015ApJ...814..117N .doi :10.1088/0004-637X/814/2/117 .S2CID 9341381 . Retrieved30 December 2016 . ^a b c d Ryan, E. L.; Mizuno, D. R.; Shenoy, S. S.; Woodward, C. E.; Carey, S. J.; Noriega-Crespo, A.; et al. (June 2015)."The kilometer-sized Main Belt asteroid population revealed by Spitzer" .Astronomy and Astrophysics .578 : 12.arXiv :1204.1116 Bibcode :2015A&A...578A..42R .doi :10.1051/0004-6361/201321375 .S2CID 21069867 . Retrieved30 December 2016 . ^a b Behrend, Raoul."Asteroids and comets rotation curves – (1550) Tito" .Geneva Observatory . Retrieved30 December 2016 . ^a b Cooney, Walter R. Jr.; Pozzoli, Valentino; Gross, John (March 2004)."Rotation period and lightcurve of minor planet 1550 Tito" .The Minor Planet Bulletin .31 (1):23– 24.Bibcode :2004MPBu...31...23C .ISSN 1052-8091 . Retrieved30 December 2016 . ^a b Higgins, David; Benishek, Validimir (April 2011)."Period Determination of Asteroid 1550 Tito" .The Minor Planet Bulletin .38 (2):79– 80.Bibcode :2011MPBu...38...79H .ISSN 1052-8091 . Retrieved30 December 2016 . ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015)."Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results" .Icarus .261 :34– 47.arXiv :1506.00762 Bibcode :2015Icar..261...34V .doi :10.1016/j.icarus.2015.08.007 .S2CID 53493339 . Retrieved30 December 2016 . ^a b "1550 Tito (1937 WD)" .Minor Planet Center . Retrieved30 December 2016 .^ Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs".Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) 221 .Bibcode :2009dmpn.book.....S .doi :10.1007/978-3-642-01965-4 .ISBN 978-3-642-01964-7
