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F r o m W i k i p e d i a , t h e f r e e e n c y c l o p e d i a
21873 Jindřichůvhradec (provisional designation 1999 UU3 asteroid and relatively slower-than average rotator from the outer region of the asteroid belt , approximately 8 kilometers (5.0 miles) in diameter.
It was discovered by Czech astronomers Jana Tichá and Miloš Tichý at the South Bohemian Kleť Observatory on 29 October 1999, and named for the Czech town of Jindřichův Hradec .[1]
The asteroid is a member of the Hygiea family (601 [4] family of carbonaceous outer-belt asteroids, named after the fourth-largest asteroid , 10 Hygiea .[10] outer main-belt at a distance of 2.5–3.8 AU eccentricity of 0.21 and an inclination of 4° with respect to the ecliptic .[5] precovery was obtained at Crimea–Nauchnij in 1982, extending the asteroid's observation arc by 17 years prior to its discovery.[1]
Physical characteristics [ edit ]
According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer , the asteroid measures 7.2 kilometers in diameter and its surface has an albedo of 0.23.[6] absolute magnitude of 13.63, the Collaborative Asteroid Lightcurve Link calculates a diameter of 10.4 kilometers, assuming a standard albedo for carbonaceous C-type asteroids of 0.057,[3] spectral type .[10] : 23 Pan-STARRS , however, classifies the body as an X-type asteroid , which metallic core group has an intermediate albedo between stony and carbonaceous bodies.[9]
In September 2010, a photometric lightcurve analysis at the U.S. Palomar Transient Factory , California, gave a long rotation period of ± 0.0664magnitude (U=2 [8] slow rotator for an asteroid of its size, which normally have periods of just a few hours rather than several days.
This minor planet was named after Jindřichův Hradec , a south Bohemian town in the Czech Republic. Founded in the 13th century, it is known for its Renaissance château and Gothic church, which is exactly built on the 15th meridian east of Greenwich . A line marks the course of the meridian in its paving stones.[2] Minor Planet Center on 28 January 2002 (M.P.C. 44595[11]
References [ edit ]
^ a b Schmadel, Lutz D. (2007). "(21873) Jindřichůvhradec". Dictionary of Minor Planet Names . Springer Berlin Heidelberg . p. 868. doi :10.1007/978-3-540-29925-7_9693 . ISBN 978-3-540-00238-3
^ a b c d e f "LCDB Data for (21873) Jindrichuvhradec" . Asteroid Lightcurve Database (LCDB). Retrieved 17 May 2016 .
^ a b "Asteroid 21873 Jindrichuvhradec – Nesvorny HCM Asteroid Families V3.0" . Small Bodies Data Ferret . Retrieved 27 October 2019 .
^ a b c "JPL Small-Body Database Browser: 21873 Jindrichuvhradec (1999 UU3)" (2017-03-27 last obs.). Jet Propulsion Laboratory . Retrieved 5 July 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 . Retrieved 17 May 2016 .
^ a b 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 . Retrieved 3 December 2016 .
^ 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 . Retrieved 17 May 2016 .
^ 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 . Retrieved 17 May 2016 .
^ a b 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 . Retrieved 17 May 2016 .
External links [ edit ]
R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=21873_Jindřichůvhradec&oldid=1196963397 " C a t e g o r i e s : ● M i n o r p l a n e t o b j e c t a r t i c l e s ( n u m b e r e d ) ● H y g i e a a s t e r o i d s ● D i s c o v e r i e s b y J a n a T i c h á ● D i s c o v e r i e s b y M i l o š T i c h ý ● N a m e d m i n o r p l a n e t s ● A s t r o n o m i c a l o b j e c t s d i s c o v e r e d i n 1 9 9 9 H i d d e n c a t e g o r i e s : ● U s e d m y d a t e s f r o m O c t o b e r 2 0 1 9 ● W e b a r c h i v e t e m p l a t e w a y b a c k l i n k s ● A r t i c l e s w i t h J P L S B D B i d e n t i f i e r s ● A r t i c l e s w i t h M P C i d e n t i f i e r s
● T h i s p a g e w a s l a s t e d i t e d o n 1 9 J a n u a r y 2 0 2 4 , a t 0 0 : 0 9 ( U T C ) . ● T e x t i s a v a i l a b l e u n d e r t h e C r e a t i v e C o m m o n s A t t r i b u t i o n - S h a r e A l i k e L i c e n s e 4 . 0 ;
a d d i t i o n a l t e r m s m a y a p p l y . B y u s i n g t h i s s i t e , y o u a g r e e t o t h e T e r m s o f U s e a n d P r i v a c y P o l i c y . W i k i p e d i a ® i s a r e g i s t e r e d t r a d e m a r k o f t h e W i k i m e d i a F o u n d a t i o n , I n c . , a n o n - p r o f i t o r g a n i z a t i o n . ● P r i v a c y p o l i c y ● A b o u t W i k i p e d i a ● D i s c l a i m e r s ● C o n t a c t W i k i p e d i a ● C o d e o f C o n d u c t ● D e v e l o p e r s ● S t a t i s t i c s ● C o o k i e s t a t e m e n t ● M o b i l e v i e w
