RELASI APROKSIMASI ANTARA DIAMETER KAWAH TUMBUKAN DI BUMI DAN UKURAN OBJEK PENUMBUK DARI SIMULASI NUMERIK

Judhistira Aria Utama

Abstract

Di permukaan Bulan dan planet-planet terestrial dapat dijumpai kawah-kawah hasil tumbukan benda-benda angkasa. Studi ini mencoba memperoleh relasi aproksimasi antara diameter kawah tumbukan di Bumi terhadap ukuran objek yang diperlukan untuk membentuk kawah tersebut. Studi dilakukan menggunakan simulasi numerik terhadap ribuan sampel asteroid dekat-Bumi  nyata dalam orbit yang telah dikenal dengan baik. Menggunakan asumsi bahwa jumlah kawah yang dibentuk di permukaan Bumi sama dengan banyaknya asteroid dekat-Bumi yang menumbuk dalam kurun waktu tertentu, diperoleh bahwa diperlukan asteroid dengan diameter yang lebih kecil untuk menghasilkan kawah-kawah besar yang dikenal dibandingkan prediksi yang ada sebelumnya. Pengetahuan tentang ukuran fisik asteroid penumbuk dapat digunakan dalam mengestimasi besarnya energi tumbukan yang dihasilkan, yang berhubungan pula dengan strategi metode mitigasi yang diperlukan.

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