طروادة مريخية

مجموعة النقاط الخامسة (L5) من نقاط لاغرانج تبدو واضحة بالأخضر، أما مجموعة النقاط الرابعة (L4) فهي تبدو بالأزرق الفاتح، يمكن ملاحظة المريخ باللون البرتقالي والأرض بلون أزرق، أما الكوكب ذو المدار البعيد فهو المشتري.

طروادة مريخية أو الطرواديات المريخية هي مجموعة من الأجرام التي تشارك نفس مدار المريخ حول الشمس، ويمكن إيجادها حول نقاط لاغرانج التي تقع أمام وخلف المريخ. أصل هذه الأجرام لا يزال غير متأكد منه، توجد افتراضية تقول أنها وجدت حول المريخ في بدايات تشكيل المجموعة الشمسية حيث قبضتها جاذبية الكوكب.[1][2] افتراضية أخرى تقول أن أصل هذه الأجرام هي كويكبات شاردة في بداية تشكيل المجموعة الشمسية صادف أنها عبرت نقاط لاغرانج الخاصة بالمريخ فاستقرت هناك منذ ذاك الحين، لكن هذه الافتراضية لا زالت تخضع للدراسة وإعادة النظر بسبب كتلة المريخ القليلة نسبياً.[3][4]

في يومنا الحاضر توجد سبع كويكبات مؤكد أنها طروادة مريخية لها مدار ثابت، لكن أربعة منها فقط معترف فيها لدى مركز الكواكب الصغيرة.

انظر أيضاً

المراجع

  1. ^ Trilling, David; Rivking, Andrew; Stansberry, John; Spahr, Timothy; Crudo, Richard; Davies, John (2007). "Albedos and diameters of three Mars Trojan asteroids". Icarus 192 (2): 442–447. arXiv:0709.1921. Bibcode:2007Icar..192..442T. doi:10.1016/j.icarus.2007.08.002. نسخة محفوظة 24 أغسطس 2017 على موقع واي باك مشين.
  2. ^ Rivkin, Andrew; Trilling, David; Thomas, Cristina; DeMeo, Fancesca; Spahr, Timoth; Binzel, Richard (2007). "Composition of the L5 Mars Trojans: Neighbors, not siblings". Icarus 192 (2): 434–441. arXiv:0709.1925. Bibcode:2007Icar..192..434R. doi:10.1016/j.icarus.2007.06.026. نسخة محفوظة 23 أغسطس 2017 على موقع واي باك مشين.
  3. ^ Schwarz, R.; Dvorak, R. (2012). "Trojan capture by terrestrial planets". Celestial Mechanics and Dynamical Astronomy 113 (1): 23–34. Bibcode:2012CeMDA.113...23S. doi:10.1007/s10569-012-9404-4. نسخة محفوظة 17 يونيو 2018 على موقع واي باك مشين.
  4. ^ Scholl, H.; Marzari, F.; Tricarico, P. (2005). "Dynamics of Mars Trojans". Icarus 175 (2): 397–408. Bibcode:2005Icar..175..397S. doi:10.1016/j.icarus.2005.01.018. نسخة محفوظة 14 ديسمبر 2018 على موقع واي باك مشين.

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