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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
1520 Imatra , provisional designation 1938 UY , is a carbonaceous Ursula asteroid from the outer region of the asteroid belt , approximately 54 kilometers in diameter. It was discovered on 22 October 1938, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, who named after the Finnish town of Imatra .[2] [16]
Orbit
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Imatra is a member of the Ursula family (631 [4] family of C- and X-type asteroids , named after its parent body, 375 Ursula .[17] : 23 outer main-belt at a distance of 2.8–3.4 AU semi-major axis of 3.11 AU ). Its orbit has an eccentricity of 0.10 and an inclination of 15° with respect to the ecliptic .[1] No precoveries and no prior identifications were made. Imatra ' s observation arc begins at Turku, 3 weeks after its official discovery observation.[16]
Physical characteristics
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Imatra is a C-type asteroid in the SMASS taxonomy .[1]
Rotation period
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In July 2008, American astronomer Brian Warner obtained a rotational lightcurve of Imatra at his Palmer Divide Observatory in Colorado. It gave a rotation period of 18.635 hours with a brightness variation of 0.28 magnitude (U=3- [14] U=2 [12] Laurent Bernasconi , Romain Montaigut and Arnaud Leroy gave a period of 18.609 hours with an amplitude of 0.27 magnitude (U=2+ [13]
Diameter and albedo
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According to the surveys carried out by the Infrared Astronomical Satellite IRAS , the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Imatra measures between 53.42 and 58.63 kilometers in diameter, and its surface has an albedo between 0.039 and 0.062.[5] [6] [7] [8] [9] [10] [11] Collaborative Asteroid Lightcurve Link derives an albedo of 0.0428 and a diameter of 53.41 kilometers using an absolute magnitude of 10.4.[3]
Naming
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This minor planet is named for the south-eastern Finnish town Imatra , located in South Karelia near the Russian border, about halfway between St Petersburg and Finland's capital Helsinki .[2] naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3929[18]
References
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^ a b c d e f "LCDB Data for (1520) Imatra" . Asteroid Lightcurve Database (LCDB). Retrieved 3 January 2017 .
^ a b "Asteroid 1520 Imatra – Nesvorny HCM Asteroid Families V3.0" . Small Bodies Data Ferret . Retrieved 26 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 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 . Retrieved 3 January 2017 .
^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0" . NASA Planetary Data System . 12 Bibcode :2004PDSS...12.....T . Retrieved 22 October 2019 .
^ 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 . Retrieved 3 January 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 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 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 . Retrieved 3 January 2017 .
^ a b de Sanctis, M. C.; Barucci, M. A.; Angeli, C. A.; Fulchignoni, M.; Burchi, R.; Angelini, P. (October 1994). "Photoelectric and CCD observations of 10 asteroids" . Planetary and Space Science . 42 10 ): 859–864. Bibcode :1994P&SS...42..859D . doi :10.1016/0032-0633(94 )90066-3 . ISSN 0032-0633 . Retrieved 3 January 2017 .
^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1520) Imatra" . Geneva Observatory . Retrieved 3 January 2017 .
^ a b Warner, Brian D. (January 2009). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2008 May - September" . The Minor Planet Bulletin . 36 1 ): 7–13. Bibcode :2009MPBu...36....7W . ISSN 1052-8091 . Retrieved 3 January 2017 .
^ 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 3 January 2017 .
^ a b "1520 Imatra (1938 UY)" . Minor Planet Center . Retrieved 3 January 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 9780816532131
^ Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) 221 . doi :10.1007/978-3-642-01965-4 . ISBN 978-3-642-01964-7
External links
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R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=1520_Imatra&oldid=1228603552 " 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 ) ● U r s u l a a s t e r o i d s ● D i s c o v e r i e s b y Y r j ö V ä i s ä l ä ● N a m e d m i n o r p l a n e t s ● C - t y p e a s t e r o i d s ( S M A S 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 3 8 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 2 J u n e 2 0 2 4 , a t 0 4 : 2 1 ( 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
