Astridian asteroid
2169 Taiwan , provisional designation1964 VP1 , is a carbonaceous Astridianasteroid from the central regions of theasteroid belt , approximately 17 kilometers in diameter. It was discovered on 9 November 1964, by astronomers at thePurple Mountain Observatory near Nanking, China.[ 13] Taiwan .[ 2]
Orbit and classification [ edit ] Taiwan is a member of theAstrid family (515 asteroid family of nearly 500 carbonaceous asteroids. The family is located in the outermost central main-belt, near a prominentKirkwood gap , that marks the 5:2orbital resonance with Jupiter, and divides the asteroid belt into a central and outer part.[ 4] [ 14] [ 15] : 23
Taiwan orbits the Sun at a distance of 2.7–2.9 AU once every 4 years and 8 months (1,703 days). Its orbit has aneccentricity of 0.05 and aninclination of 2° with respect to theecliptic .[ 1]
The body'sobservation arc begins with its first identification as1938 DV1 atHeidelberg Observatory in February 1938, almost 27 years prior to its official discovery observation at Nanking.[ 13]
Physical characteristics [ edit ] In theSMASS classification , and according toPanSTARRS photometric survey,Taiwan is a carbonaceousC-type asteroid .[ 1] [ 12]
In September 2010, a rotationallightcurve ofTaiwan was obtained from photometric observations in the R-band by astronomers at thePalomar Transient Factory in California. Lightcurve analysis gave arotation period of 7.252 hours with a brightness variation of 0.17magnitude (U=2 [ 11]
Diameter and albedo [ edit ] According to the surveys carried out by the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer ,Taiwan measures between 16.52 and 19.263 kilometers in diameter and its surface has analbedo between 0.042 and 0.085.[ 5] [ 6] [ 7] [ 8] [ 9] [ 10]
TheCollaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 14.39 kilometers based on anabsolute magnitude of 12.94.[ 3]
Thisminor planet was named after theTaiwan Province .[ 2] Minor Planet Center on 1 February 1980 (M.P.C. 5184[ 16]
^a b c d e f "JPL Small-Body Database Browser: 2169 Taiwan (1964 VP1)" (2017-06-05 last obs.).Jet Propulsion Laboratory . Retrieved4 September 2017 .^a b c Schmadel, Lutz D. (2007). "(2169) Taiwan".Dictionary of Minor Planet Names .Springer Berlin Heidelberg . p. 176.doi :10.1007/978-3-540-29925-7_2170 .ISBN 978-3-540-00238-3 ^a b c d e f "LCDB Data for (2169) Taiwan" . Asteroid Lightcurve Database (LCDB). Retrieved4 September 2017 .^a b "Asteroid 2169 Taiwan – Nesvorny HCM Asteroid Families V3.0" .Small Bodies Data Ferret . Retrieved26 October 2019 .^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 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 . Retrieved4 September 2017 . ^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 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 . Retrieved4 September 2017 . ^a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011)."Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters" .The Astrophysical Journal .741 (2): 20.arXiv :1109.4096 Bibcode :2011ApJ...741...68M .doi :10.1088/0004-637X/741/2/68 . Retrieved4 September 2017 . ^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 . ^a b c Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015)."Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry" .The Astronomical Journal .150 (3): 35.arXiv :1504.04041 Bibcode :2015AJ....150...75W .doi :10.1088/0004-6256/150/3/75 . Retrieved4 September 2017 . ^a b c 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 . Retrieved4 September 2017 . ^a b "2169 Taiwan (1964 VP1)" .Minor Planet Center . Retrieved4 September 2017 .^ Vokrouhlický, D.; Broz, M.; Bottke, W. F.; Nesvorný, D.; Morbidelli, A. (May 2006)."Yarkovsky/YORP chronology of asteroid families" (PDF) .Icarus .182 (1):118– 142.Bibcode :2006Icar..182..118V .doi :10.1016/j.icarus.2005.12.010 . Retrieved4 September 2017 . ^ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families".Asteroids IV . pp. 297– 321.arXiv :1502.01628 Bibcode :2015aste.book..297N .doi :10.2458/azu_uapress_9780816532131-ch016 .ISBN 978-0-8165-3213-1 ^ "MPC/MPO/MPS Archive" .Minor Planet Center . Retrieved4 September 2017 .
