Free Astronomy Magazine November-December 2025 ARABIC VERSION

have revealed that the asteroid is just 11 metres wide, meaning it could easily fit inside the dome of the VLT unit telescope used to ob- serve it. It is also spinning about twice as fast as previously thought: “One day on this asteroid lasts only five minutes!” he says. Previousdata indicated that the asteroid was around 30 metres in diameter and completed a rotation in 10 minutes or so. “The smaller size and faster rotation now measured will make Hayabusa2’s visit even more inter- esting, but also even more challeng- ing,” says co-author Olivier Hainaut, an astronomer at ESO in Germany. This is because a touchdown ma- noeuvre, where the spacecraft ‘kisses’ the asteroid, will be more difficult to perform than antici- pated. 1998 KY 26 is set to be thefinal target asteroid for the Japan- ese Aerospace eXploration Agency (JAXA)’s Hayabusa2 spacecraft. In its original mission, Hayabusa2 explored the 900-metre-diameter asteroid 162173 Ryugu in 2018, re- turning asteroid samples to Earthin 2020. With fuel remaining, the spacecraft was sent on an extend- edmissionuntil2031,whenit’sset to encounter 1998 KY 26 , aiming to learn more about the smallest aster- oids. This will be the first time a spacemissionencountersatinyas- NOVEMBER-DECEMBER2025 أﻧﻪ ﻳﻤﻜﻦ ﻟﻠﻜﻮﻳﻜﺐ ﻳـﺪﺧﻞ ﺑﺴـﻬﻮﻟﺔ داﺧـﻞ ى ﻗﺒﺎب ﺣﺪ إ ﺗﻠﺴﻜﻮب ) VLT ( اﻟﺬي اﺳﺘﺨﺪام ﻟﺮﺻﺪه . ﻛﻤﺎ ﻳﺘﻀﺢ أ ﻧﻪ ﻳﺪور ﺑ ـ اﻛـﱪ ﴪﻋﺔ ﺑﻜﺜ ﻣﺎ ﻛﺎن ﻳﻌﺘﻘﺪ ﺳﺎﺑﻘ : ﺎً ﻳﺴـﺘﻐﺮق ﻳـﻮم واﺣﺪ ﻋﲆ ﻫﺬا اﻟﻜﻮﻳﻜﺐ ﺧﻤﺲ دﻗﺎﺋﻖ ﻓﻘـﻂ ﺣﺴﺐ اﻟﺪراﺳﺔ اﻷﺧ ة . أﺷــﺎرت اﻟﺒﻴﺎﻧــﺎت اﻟﺴــﺎﺑﻘﺔ إﱃ أن ﻗﻄــﺮ اﻟﻜﻮﻳ ﻜﺐ ﻛﺎن ﺣﻮاﱄ 30 ﻳو اً ﻣﱰ ﻜﻤﻞ دوراﻧﻪ ﰲ ﺣﻮاﱄ 10 ﻳﻘـ . دﻗﺎﺋﻖ ﻮل ا ﺆﻟـﻒ ا ﺸـﺎرك أوﻟﻴﻔﻴﻴﻪ ﻫﻴﻨﻮ ﻋﺎﻟﻢ اﻟﻔﻠﻚ ﰲ ا ﺮﺻﺪ اﻷوروﺑﻲ اﻟﺠﻨــﻮﺑﻲ ﺑﺄ ﺎﻧﻴــﺎ " : إن اﻟﺤﺠــﻢ اﻷﺻــﻐﺮ واﻟﺪوران اﻷﴎع ا ﻘﺎﺳـ ﺎن اﻵن ﺳـﻴﺠﻌﻼن زﻳﺎرة ا ﺮﻛﺒﺔ ﻫﺎﻳﺎﺑﻮﺳﺎ 2 أﻛﺜﺮ إﺛﺎرة وﻟﻜﻨ ﻬﻤﺎ ﻳﺠﻌﻼﻧﻬـﺎ أﻳﻀـ ﺎً أﻛﺜـﺮ ﺗ ﺎً ﺤـﺪﻳ إذ ﺳـﺘﻜﻮن ﻣﻨﺎورة اﻟﻬﺒﻮط اﻟﺘـﻲ ﺗﺘﻄﻠـﺐ أن ﺗﻠﻤـﺲ " " ا ﺮﻛﺒﺔ اﻟﻜﻮﻳﻜﺐ أﺻﻌﺐ ﻣﻤﺎ ﻛﺎن ﻣﺘﻮﻗﻌ . ﺎً ﻣﻦ ا ﻘﺮر أن ﻳﻜﻮن اﻟﻜﻮﻳﻜﺐ KY 26 1998 ﻫﻮ اﻟﻬﺪف اﻷﺧ ﺮﻛﺒﺔ ﻫﺎﻳﺎﺑﻮﺳﺎ 2 اﻟﻔﻀـﺎﺋﻴﺔ اﻟﺘﺎﺑﻌﺔ ﻟﻮﻛﺎﻟﺔ اﺳﺘﻜﺸﺎف اﻟﻔﻀﺎء اﻟﻴﺎﺑﺎﻧﻴﺔ . اﺳﺘﻜﺸﻔﺖ ﻫﺎﻳﺎﺑﻮﺳـﺎ 2 اﻟﻜﻮﻳﻜـﺐ رﻳﻮﻏـﻮ اﻟﺬي ﻳﺒﻠﻎ ﻗﻄﺮه 900 ﻣﱰ ﻋﺎم 2018 وﺟﻠﺒﺖ ﻣﻨﻪ ﻋﻴﻨﺎت إﱃ اﻷرض ﻋـﺎم 2020 وﺑﻔﻀـﻞ ﺑﻘﺎء اﻟﻮﻗﻮد واﺻﻠﺖ ا ﺮﻛﺒﺔ ﻣﻬﻤ ا ﺘﻬﺎ ﻤﺘـﺪة ﺣﺘﻰ ﻋﺎم 2031 ﺣﻴﺚ ﻣﻦ ا ﻘﺮر أن ﺗﺼﻄﺪم ﺑﺎﻟﻜﻮﻳﻜﺐ KY 26 1998 ﻌﺮﻓـﺔ ا ﺰﻳـﺪ ﻋـﻦ أﺻﻐﺮ اﻟﻜﻮﻳﻜﺒﺎت وﺳﺘﻜﻮن ﻫـﺬه ا ـﺮة أول ﻣﻬﻤﺔ ﻓﻀـﺎﺋﻴﺔ ﺗﺼـﻄﺪم ﺑﻜﻮﻳﻜـﺐ ﺻـﻐ ﺑﻴﻨﻤـﺎ زارت اﻟﺒﻌﺜ ـﺎت اﻟﺴـﺎﺑﻘﺔ ﻛﻮﻳﻜﺒ ـﺎت ﺑﺄﻗﻄﺎر ﺗﺼﻞ إﱃ ﻣﺌﺎت أو آﻻف اﻷﻣﺘﺎر . رﺳـــــﻢ ﺗﺨ ﻠـــــﻲ ﺼـــــﻮر ـــــﺔ اﻟﻔﻀـــــﺎء ﻫﺒـــــﻮطﻣﺮﻛ اﻟ ﺎ ﺎﻧ ﺔ ﻫﺎ ﺎﺑﻮﺳﺎ 2 ﻋﻠﻰﺳﻄﺢ اﻟ ﻮ ﻜـﺐ KY 26 1998 . ــﺪة ﺎﺳــﺘﺨﺪام ــﺎت رﺻــﺪ ﺟﺪ ﻛﺸــﻔﺖ ﻋﻤﻠ اﻟﺘﻠﺴــــــ ﻮب اﻟﻜﺒــــــ ) ﺟــــــﺪاً VLT ( اﻟﺘــــــﺎﺑﻊ ﻟﻠﻤﺮﺻــــــﺪ اﻷوروﺑـــــــﻲ اﻟـــــــ ـ ﺠﻨﻮﺑﻲ أن ﻋـــــــﺮض اﻟ ﻮ ﻜـــــــﺐ KY 26 1998 ﻳ ﻠﻎ 11 ﻣ اً ﻓﻘـﻂ أي أ ـﺜﻼث ﻣـﺮات ﺻـﻐﺮ ﺗﻘﺮ ﺎً ﻣﻤﺎ ﺎن ﻌﺘﻘـﺪ ﺳـﺎ ﻘﺎً ـﺪور و ﺣـﻮل ﻧﻔﺴـﮫ ــــﻞ 5 دﻗــــﺎﺋﻖ وﻫــــﻮ أﺳـــــﺮع ﻜﺜــــ ﻣــــﻦ اﻟﻤﺘﻮﻗـــــﻊ . ﺗﻈﻬـــــــﺮاﻟﺼـــــــﻮرة أﻋـــــــﻼﻩ ﻣﻘﺎرـــــــﺔ ﻣﺤﺪﺛـــــــﺔ ﻟـــــــ ـ ﺤ ﻢ اﻟ ﻮ ﻜﺐ واﻟﻤﺮﻛ ﺔ اﻟﻔﻀﺎﺋ ﺔ ﺪﻗﺔ ﻣﺬﻫﻠﺔ . [ESO/M.Kornmesser.As- teroid:T.Santana-Rosetal.Hayabu - sa2 model: SuperTKG (CC-BY-SA)] ﻣﺠﻠﺔ FreeAstronomy ﺎﻟﻌﺮ ﺔ 9 ﻧﻮﻓﻤﺒﺮ - ﺩﻳﺴﻤﺒﺮ 2 0 2 5