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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
( R e d i r e c t e d f r o m H o p m a n n )
1985 Hopmann (prov. designation 1929 AE ) is a dark background asteroid in the outer regions of the asteroid belt . It was discovered on 13 January 1929, by astronomer Karl Reinmuth at Landessternwarte Heidelberg-Königstuhl in southern Germany.[10] rotation period of 17.5 hours and measures approximately 36 kilometers (22 miles) in diameter. It was later named after German astronomer Josef Hopmann (1890–1975).[2]
Orbit and classification [ edit ]
Hopmann is a dark C-type asteroid that orbits the Sun in the outer main-belt at a distance of 2.6–3.6 AU eccentricity of 0.15 and an inclination of 17° with respect to the ecliptic .[1] observation arc was taken at the discovering observatory on 4 February 1926, or 22 days after its official discovering observation.[10]
This minor planet was named in memory of German astronomer Josef Hopmann (1890–1975), a director of Vienna Observatory between 1951 and 1962, a productive observer of variable and binary stars , and a participant in the international program to observe near-Earth asteroid 433 Eros in the early 1930s. The lunar crater Hopmann [2] naming citation was published by the Minor Planet Center on 15 October 1977 (M.P.C. 4237[11]
Physical characteristics [ edit ]
According to the survey carried out by the Infrared Astronomical Satellite IRAS , Hopmann measures 35.51 kilometers in diameter.[1] Collaborative Asteroid Lightcurve Link agrees with the Supplemental IRAS Minor Planet Survey (SIMPS) data and derives an albedo of 0.039 and a diameter of 35.47 kilometers,[3] Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission gave an albedo of 0.06 and a diameter of 44.33 kilometers.[4]
In January and February 2012, three rotational lightcurves were obtained by Robert Stephens at Santana Observatory (646 B20 E09 rotation period of 17.476, 17.478 and 17.480 hours, respectively, with a brightness variation between 0.36 and 0.44 magnitude (U=3/3/3- [5] [6] [8] [7]
References [ edit ]
^ a b c d e f "LCDB Data for (1985) Hopmann" . Asteroid Lightcurve Database (LCDB). Retrieved 25 October 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 . Retrieved 25 October 2016 .
^ a b Aymami, Josep Maria (July 2012). "CCD Photometry and Lightcurve Analysis of Main-Belt Asteroids 14 Irene 4874 Burke, 1985 Hopmann, 3017 Petrovic, and 3070 Aitken from Observatori Carmelita in Tiana" (PDF) . Minor Planet Bulletin . 39 3 ): 179–181. Bibcode :2012MPBu...39..179A . ISSN 1052-8091 . Archived from the original (PDF) on 23 March 2020. Retrieved 17 March 2020 .
^ a b Moravec, Patricia; Cochren, Joseph; Gerhardt, Michael; Harris, Andrew; Karnemaat, Ryan; Melton, Elizabeth; et al. (October 2012). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2012 January-April" (PDF) . Minor Planet Bulletin . 39 4 ): 213–216. Bibcode :2012MPBu...39..213M . ISSN 1052-8091 . Retrieved 17 March 2020 .
^ a b Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database" . Astronomy and Astrophysics . 587 : 6. arXiv :1601.02909 Bibcode :2016A&A...587A..48D . doi :10.1051/0004-6361/201527573 . Retrieved 25 October 2016 .
^ a b Stephens, Robert D. (July 2012). "Asteroids Observed from GMARS and Santana Observatories: 2012 January - March" (PDF) . Minor Planet Bulletin . 39 3 ): 181–183. Bibcode :2012MPBu...39..181S . ISSN 1052-8091 . Archived from the original (PDF) on 23 March 2020. Retrieved 17 March 2020 .
^ 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 25 October 2016 .
^ a b "1985 Hopmann (1929 AE)" . Minor Planet Center . Retrieved 25 October 2016 .
^ 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 [ edit ]
R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=1985_Hopmann&oldid=1218255775 " 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 K a r l W i l h e l m R e i n m u t h ● 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 2 9 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 i s d i f f e r e n t f r o m W i k i d a t a ● 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 ● 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 0 A p r i l 2 0 2 4 , a t 1 7 : 0 6 ( 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
