Free Astronomy Magazine November-December 2025 ARABIC VERSION

Will Hayabusa2 succeed in landingon 1998 KY 26 ? byESO BárbaraFerreira stronomers have used obser- vatoriesaroundtheworld,including the European Southern Observatory’s Very Large Telescope (ESO’s VLT), to study the asteroid1998KY 26 ,revealingittobe almost three times smaller and spin- ningmuchfasterthanpreviously thought.Theasteroidisthe2031 targetforJapan’sHayabusa2ex- tended mission. The new observa- tionsofferkeyinformationforthe mission’s operations at the asteroid, just six years out from the space- craft’s encounter with 1998 KY 26 . “We found that the reality of the object is completely different from whatitwaspreviouslydescribedas,” says astronomer Toni Santana-Ros, a researcherfromtheUniversityofAl- icante, Spain, who led a study on 1998 KY 26 published in Nature Com- munications . The new observations, combinedwithpreviousradardata, A : ﻘﻠﻢ ﺎر ﺮا ﻓ ﺮا اﻟﻤﺮﺻﺪ اﻷوروﺑﻲ اﻟـﺠﻨﻮﺑﻲ ﺗﻈﻬﺮ ﻫﺬﻩ اﻟﺼﻮرة اﻟﺘﻮﺿﻴﺤ ﺔ ﺣ ﻢ اﻟ ﻮ ﻜﺐ KY26 1998 ﻣﻘﺎر ـــﺔ ﺄﺣــــﺪ ﺗﻠﺴــــ ﻮ ﺎت اﻟﻮﺣــــ ﺪات اﻟﺘﺎ ﻌـــــﺔ ﻟﻠﺘﻠﺴــــــ ﻮب اﻟﻜﺒـــــ ) اً ﺟــــــﺪ VLT ( واﻟــــــﺬ ﻳ ﻠــﻎ ﻗﻄــﺮ ﻣﺮآﺗــﮫ اﻟﺮ ﺴــ ﺔ ﺣــﻮاﻟﻲ 8 أﻣﺘــﺎر و ﻤــﺎ أﻇﻬــــــﺮ دراﺳــــــﺔ ﺣﺪ ﺜــــــﺔ ﺎﺳــــــﺘﺨﺪام اﻟﺘﻠﺴــــــ ﻮب اﻟﻌﻤـﻼقﺟــﺪًا اﻟﺘـﺎﺑﻊ ﻟﻠﻤﺮﺻــﺪ اﻷوروﺑـﻲ اﻟــ ـ ﺠﻨﻮﺑﻲ ﻋـــﺮض اﻟ ﻮ ﻜـــﺐ KY 26 1998 ﻳ ﻠـــﻎ 11 اً ﻣـــ ﻓﻘــــﻂ ــــــﻞ أن اﻟ ﻮ ﻜــــــﺐﺳ ﺘﻨﺎﺳــــــﺐ ﻣــــــﻊ ﻫﻴ ﻣﻤــــــﺎ ﻌــــــ اﻟﺘﻠﺴـــــ ﻮب ﻧﻔﺴـــــﮫ رﺻـــــﺪﻩ اﻟـــــﺬ . ﺗﺘﻀـــــﻤﻦ ﻫـــــﺬﻩ اﻟﺼـــــــﻮرة ﺷ ﺎً ﺨﺼـــــــ ﺑﺤ ﻤـــــــﮫ ﻓـــــــﻲ أﺳـــــــﻔﻞ اﻟ ﻤــــــــ . ﺗﺨﻄــــﻂﻣﻬﻤــــﺔ اﻟﻤﺴــــ ﺎر ﻫﺎ ﺎﺑﻮﺳــــﺎ 2 اﻟﻔﻀــــﺎﺋ ﺔ اﻟ ﺎ ﺎﻧ ﺔ ﻟﻠﻮﺻﻮل إﻟﻰ ﻫﺬا اﻟ ﻮ ﻜﺐ اﻟﺼﻐ ﻓـﻲ ﻏﻀـــــﻮنﺳـــــﺖﺳـــــﻨﻮا ت ـــــﮫ وأﺻـــــﻮﻟﮫ ﻟﺪراﺳـــــﺔ ﺗﺮﻛﻴ ﺘﻔﺎﺻﻴﻞ دﻗ ﻘﺔ . [NASA/JPL-Caltech] اﺳـﺘﺨﺪم ﻋﻠﻤﺎء اﻟﻔﻠﻚ ﻣﺮاﺻﺪ ﻣـﻦ ﻣﺨﺘﻠـﻒ أﻧﺤﺎء اﻟﻌﺎﻟﻢ ﺑﻤﺎ ﰲ ذﻟﻚ اﻟﺘﻠﺴﻜﻮب اﻟﻜﺒ ﺟﺪ اً اﻟﺘﺎﺑﻊ ﻟﻠﻤﺮﺻـﺪ اﻷوروﺑـﻲ اﻟﺠﻨـﻮﺑﻲ ) VLT ( ﻟﺪراﺳﺔ اﻟﻜﻮﻳﻜ ﺐ 1998 KY 26 و ﻗـﺪ ﻛﺸـﻔﺖ ﻫﺬه اﻟﺪراﺳﺎت أن اﻟﻜﻮﻳﻜـﺐ أﺻـﻐﺮ ﺑـﺜﻼث ﻣﺮات ﺗﻘ و ﺎً ﺮﻳﺒ ﻳﺪور ﺑﴪﻋﺔ أﻛﱪ ﺑﻜﺜ ﻣﻤـﺎ ﻛﺎن ﻳﻌﺘﻘﺪ ﺳﺎﺑﻘ . ﺎً ﻳﻌﺪ ﻫﺬا اﻟﻜﻮﻳﻜـﺐ ﻫـﺪﻓ ﺎً ﻟﺒﻌﺜﺔ " ﻫﺎﻳﺎﺑﻮﺳﺎ 2 " ا ﻮﺳ ﻌﺔ اﻟﺘﺎﺑﻌﺔ ﻟﻠﻴﺎﺑﺎن ﰲ ﻋﺎم 2031 . ﺗﻮﻓﺮ ﻫـﺬه اﻷرﺻـﺎد اﻟﺠﺪﻳـﺪة ﻣﻌﻠﻮﻣﺎت ﻣﻬﻤﺔ ﻟﻌﻤﻠﻴﺎت اﻟﺒﻌﺜﺔ ﻋﻨﺪ اﻟﻮﺻﻮل ـ إﱃ اﻟﻜﻮﻳﻜﺐ وذﻟﻚ ﻗﺒﻞ ﺳﺖ ﺳﻨﻮات ﻓﻘﻂ ﻣﻦ ﻣﻮﻋﺪ ﻟﻘﺎء ا ﺮﻛﺒﺔ اﻟﻔﻀﺎﺋﻴﺔ ﺑﻪ . ﻳﻘﻮل ﻋﺎﻟﻢ اﻟﻔﻠﻚ ﺗﻮﻧﻲ ﺳﺎﻧﺘﺎﻧﺎ اﻟﺒﺎ روس ﺣﺚ ﻣﻦ ﺟﺎﻣﻌﺔ أﻟﻴﻜﺎﻧﺘﻲ ﰲ إﺳﺒﺎﻧﻴﺎ اﻟ ﻗﺎد و ﺳﺔ ﺪرا ﻋﻦ ﻫﺬا اﻟﻜﻮﻳ ﻜﺐ وا ﻨﺸﻮرة ﺘﴩ ـﻧﻴ ﰲ ﻣﺠﻠﺔ ﻛﻮﻣﻴﻨﻴﻜﻴﺸـﻨﺰ " : ﻟﻘـﺪ اﻛﺘﺸـﻔﻨﺎ أن اﻟﻮا ﻗـﻊ اﻟﻔﻌﲇ ﻟﻬﺬا اﻟﺠﺮم ﻳﺨﺘﻠﻒ ﺗﻤﺎﻣ ﺎً ﻋﻤﺎ وﺻـﻒ أﻇﻬﺮت ﻘﺪ ﻓ ﺳﺎﺑﻘﺎً ﻫﺬه اﻷرﺻـﺎد إﱃ ﺟﺎﻧـﺐ ﺑﻴﺎ ﻧﺎت اﻟﺮادار اﻟﺴﺎﺑﻘﺔ أن ﻋﺮض اﻟﻜﻮﻳﻜﺐ ﻻ ﻳﺘﺠــﺎوز 11 اً ﻣــﱰ ﻓﻘــﻂ ﻣﻤـــﺎ ﻳﻌﻨــﻲ ـــــــــــــــــــــــــــــــــــــ ﺎ ﺎﺑﻮﺳﺎ ﻫ" ﻫﻞﺳﺘﻨﺠﺢ 2 " ﻓﻲاﻟﻬﺒﻮط ﻋﻠﻰاﻟ ﻮ ﻜﺐ 26 1998 KY ؟ ﺳﺒﺘﻤﺒﺮ - ﺃﻛﺘﻮﺑﺮ 2 0 2 5 ﻣﺠﻠﺔ FreeAstronomy ﺎﻟﻌﺮ ﺔ 8 ﻧﻮﻓﻤﺒﺮ - ﺩﻳﺴﻤﺒﺮ 2 0 2 5