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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
52246 Donaldjohanson (provisional designation 1981 EQ5 asteroid from the inner regions of the asteroid belt , approximately 4 kilometers (2.5 miles) in diameter. It was discovered on 2 March 1981, by American astronomer Schelte Bus at the Siding Spring Observatory in Australia. The C-type asteroid is a target of the Lucy missionDonald Johanson , the discoverer of the "Lucy" hominid fossil .[1]
Orbit and classification [ edit ]
Animation of Lucy's trajectory around Sun Lucy· Sun· Earth· 52246 Donaldjohanson · 3548 Eurybates· 21900 Orus· 617 Patroclus
Donaldjohanson is a member of the Erigone family (406 [3] [4] asteroid family of nearly 2,000 known members, which is named after its parent body 163 Erigone . It is a relatively old family that was created approximately 130 million years ago.[7]
It orbits the Sun in the inner asteroid belt at a distance of 1.9–2.8 AU semi-major axis of 2.38 AU ). Its orbit has an eccentricity of 0.19 and an inclination of 4° with respect to the ecliptic .[2] precovery was taken at the discovering observatory in February 1981, extending the body's observation arc by 2 weeks prior to its official discovery observation.[1]
Physical characteristics [ edit ]
Donaldjohanson has been characterized as a carbonaceous C-type asteroid ,[3] X spectral type for Erigonian asteroids.[7] : 23 absolute magnitude of 15.5.[2]
Lightcurve [ edit ]
Photometric observations of Donaldjohanson in August 2020 revealed that it is a slow rotator with an exceptionally high lightcurve amplitude of 1.7 magnitude .[8] [6] binary system .[8] TRAPPIST telescopes from November 2020 to February 2021 determined the rotation period of Donaldjohanson to be approximately 252 hours.[9]
Diameter and albedo [ edit ]
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Donaldjohanson measures 3.895 kilometers in diameter and its surface has an albedo of 0.103.[5]
Exploration [ edit ]
Donaldjohanson is planned to be visited by the Lucy spacecraftmi ) at a relative velocity of 13.4 kilometers (8.3 mi ) per second.[3]
This minor planet is planned to be visited by the Lucy Jupiter trojans .[10] "Lucy" hominid fossil , while Donaldjohanson is named for that fossil's co-discoverer Donald Johanson (born 1943), an American paleoanthropologist . The approved naming citation was published by the Minor Planet Center on 25 December 2015 (M.P.C. 97569[1] [11]
See also [ edit ]
References [ edit ]
^ a b c d e "JPL Small-Body Database Browser: 52246 Donaldjohanson (1981 EQ5)" (2017-01-29 last obs.). Jet Propulsion Laboratory . Retrieved 28 April 2018 .
^ a b c d e Levison, H. F.; Olkin, C.; Noll, K. S.; Marchi, S.; Lucy Team (March 2017). "Lucy: Surveying the Diversity of the Trojan Asteroids: The Fossils of Planet Formation" (PDF) . 48th Lunar and Planetary Science Conference (1964): 2025. Bibcode :2017LPI....48.2025L . Retrieved 13 April 2017 .
^ a b "Asteroid 52246 Donaldjohanson – Nesvorny HCM Asteroid Families V3.0" . Small Bodies Data Ferret . Retrieved 27 October 2019 .
^ 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 . S2CID 118745497 .
^ a b Levison, Harold F.; Olkin, Catherine B.; Noll, Keith S.; Marchi, Simone; Bell III, James F.; Bierhaus, Edward; et al. (October 2021). "Lucy Mission to the Trojan Asteroids: Science Goals" . The Planetary Science Journal . 2 5 ): 13. Bibcode :2021PSJ.....2..171L . doi :10.3847/PSJ/abf840
^ 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 9780816532131 S2CID 119280014 .
^ a b Noll, Keith (4 December 2020). "Is the Lucy Mission Target (52246) Donaldjohanson a Binary?" (HST Proposal 16452). Mikulski Archive for Space Telescopes. Retrieved 28 September 2021 .
^ Ferrais, Marin; Jehin, Emmanuel; Manfroid, Jean; Moulane, Youssef; Barkaoui, Khalid; Benkhaldoun, Zouhair (October 2021). Rotation period determination of NASA Lucy mission target (52246) Donaldjohanson . Retrieved 28 September 2021 .
^ Casey Dreier; Emily Lakdawalla (30 September 2015). "NASA announces five Discovery proposals selected for further study" . The Planetary Society. Retrieved 12 April 2017 .
^ "MPC/MPO/MPS Archive" . Minor Planet Center . Retrieved 28 April 2018 .
External links [ edit ]
R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=52246_Donaldjohanson&oldid=1218927732 " 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 ) ● E r i g o n e a s t e r o i d s ● D i s c o v e r i e s b y S c h e l t e J . B u s ● N a m e d m i n o r p l a n e t s ● S l o w r o t a t i n g m i n o r p l a n e t s ● M i n o r p l a n e t s t o b e v i s i t e d b y s p a c e c r a f t ● 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 8 1 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 A p r i l 2 0 1 8 ● 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 4 A p r i l 2 0 2 4 , a t 1 8 : 3 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
