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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
891 Gunhild (prov. designation A918 KB or 1918 DQ ) is a large background asteroid from the outer regions of the asteroid belt , that measures approximately 58 kilometers (36 miles) in diameter. It was discovered on 17 May 1918, by astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory in southwest Germany.[1] D-type asteroid has a rotation period of 11.9 hours. Any reference of the asteroid's name to a person is unknown.[2]
Orbit and classification
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Gunhild is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements .[4] [5] outer asteroid belt at a distance of 2.8–2.9 AU semi-major axis of 2.86 AU ). Its orbit has an eccentricity of 0.03 and an inclination of 14° with respect to the ecliptic .[3] A915 VE (1915 VE ) at Simeiz Observatory in November 1915. The body's observation arc begins at Heidelberg Observatory on 18 May 1918, the night after its official discovery observation.[1]
Naming
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This minor planet is named after a Feminine German first name. Any reference of this name to a person or occurrence is unknown.[2]
Unknown meaning
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Among the many thousands of named minor planets , Gunhild is one of 120 asteroids, for which no official naming citation has been published. All of these low-numbered asteroids have numbers between 164 Eva 1514 Ricouxa Auguste Charlois , Johann Palisa , Max Wolf and Karl Reinmuth .[12]
Physical characteristics
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In both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), as well as in the SDSS -based taxonomy, Gunhild is a dark D-type asteroid .[5] [10] [11] asteroid spectral type is common among outer belt asteroids and very common among the Jupiter trojan population.
Rotation period
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In July 2015, a rotational lightcurve of Gunhild was obtained from photometric observations by the Spanish group of asteroid observers, OBAS. Lightcurve analysis gave a rotation period of ± 0.001± 0.02magnitude (U=3− [9] ± 0.01 h Robert Stephens in 2000,[13] ± 0.006 h Laurent Bernasconi in 2005,[14] ± 0.003 h U=2/2/2+ [15]
Diameter and albedo
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According to the survey carried out by the Infrared Astronomical Satellite IRAS , the Japanese Akari satellite , and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), Gunhild measures (± 5.6± 0.321± 0.67albedo of (± 0.018± 0.019± 0.001[6] [7] [8] Collaborative Asteroid Lightcurve Link derives an albedo of 0.0656 and a diameter of 51.89 kilometers based on an absolute magnitude of 10.0.[16] ± 8.60 km ± 1.384 km ± 15.84 km ± 0.04± 0.0017± 0.02[5] [16] [17] asteroid occultation observed between 2010 and 2014 gave a best-fit ellipse dimension of 52.0 × 52.0 kilometers (one observation) and 63.0 × 63.0 kilometers (three observations). These timed observations are taken when the asteroid passes in front of a distant star.[5]
References
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^ a b c Schmadel, Lutz D. (2007). "(891) Gunhild". Dictionary of Minor Planet Names . Springer Berlin Heidelberg. p. 80. doi :10.1007/978-3-540-29925-7_892 . ISBN 978-3-540-00238-3
^ a b c d "JPL Small-Body Database Browser: 891 Gunhild (A918 KB)" (2020-01-28 last obs.). Jet Propulsion Laboratory . Retrieved 25 February 2020 .
^ a b "Asteroid 891 Gunhild – Proper Elements" . AstDyS-2, Asteroids – Dynamic Site. Retrieved 25 February 2020 .
^ a b c d e "Asteroid 891 Gunhild" . Small Bodies Data Ferret . Retrieved 25 February 2020 .
^ a b c 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 25 February 2020 .
^ 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 . S2CID 119293330 .
^ a b c 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 Garceran, Alfonso Carreno; Aznar, Amadeo; Mansego, Enrique Arce; Rodriguez, Pedro Brines; de Haro, Juan Lozano; Silva, Alvaro Fornas; et al. (January 2016). "Nineteen Asteroids Lightcurves at Asteroids Observers (OBAS) - MPPD: 2015 April - September" (PDF) . Minor Planet Bulletin . 43 1 ): 92–97. Bibcode :2016MPBu...43...92G . ISSN 1052-8091 . Archived from the original (PDF) on 3 October 2020. Retrieved 25 February 2020 .
^ a b c Lazzaro, D.; Angeli, C. A.; Carvano, J. M.; Mothé-Diniz, T.; Duffard, R.; Florczak, M. (November 2004). "S3OS2: the visible spectroscopic survey of 820 asteroids" (PDF) . Icarus . 172 (1 ): 179–220. Bibcode :2004Icar..172..179L . doi :10.1016/j.icarus.2004.06.006 . Retrieved 25 February 2020 .
^ a b Carvano, J. M.; Hasselmann, P. H.; Lazzaro, D.; Mothé-Diniz, T. (February 2010). "SDSS-based taxonomic classification and orbital distribution of main belt asteroids" . Astronomy and Astrophysics . 510 : 12. Bibcode :2010A&A...510A..43C . doi :10.1051/0004-6361/200913322 . Retrieved 25 February 2020 . (PDS data set)
^ Schmadel, Lutz D. (2007). "Appendix 11 – Minor Planet Names with Unknown Meaning". Dictionary of Minor Planet Names – Fifth Revised and Enlarged revision . Springer Berlin Heidelberg. pp. 927–929. ISBN 978-3-540-00238-3
^ Stephens, R. D. (December 2000). "Rotational Periods and Lightcurves of 891 Gunhild and 1017 Jacqueline" (PDF) . Minor Planet Bulletin . 27 1 ): 54–55. Bibcode :2000MPBu...27...54S .
^ Behrend, Raoul. "Asteroids and comets rotation curves – (891) Gunhild" . Geneva Observatory . Retrieved 25 February 2020 .
^ Kozdon, Janus; Cantue, Sarah; Montgomery, Kent (April 2016). "Lightcurves of Asteroids 891 Gunhild and 1614 Goldschmidt" (PDF) . Minor Planet Bulletin . 43 2 ): 171–172. Bibcode :2016MPBu...43..171K . ISSN 1052-8091 . Archived from the original (PDF) on 25 February 2020. Retrieved 25 February 2020 .
^ a b "LCDB Data for (891) Gunhild" . Asteroid Lightcurve Database (LCDB). Retrieved 25 February 2020 .
^ 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 ): 63. arXiv :1606.08923 Bibcode :2016AJ....152...63N . doi :10.3847/0004-6256/152/3/63 ISSN 0004-6256 .
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=891_Gunhild&oldid=1195668818 " 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 ) ● B a c k g r o u n d a s t e r o i d s ● D i s c o v e r i e s b y M a x W o l f ● 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 1 8 H i d d e n c a t e g o r i e s : ● A r t i c l e s w i t h s h o r t d e s c r i p t i o n ● S h o r t d e s c r i p t i o n m a t c h e s W i k i d a t a ● U s e d m y d a t e s f r o m F e b r u a r y 2 0 2 0 ● 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 4 J a n u a r y 2 0 2 4 , a t 2 0 : 4 3 ( 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
