A hit-and-run Giant Impact scenario

TL;DR

This paper proposes an alternative Moon formation scenario involving a hit-and-run giant impact with increased impact velocity and steeper angle, challenging the traditional slow, grazing impact model.

Contribution

It introduces a novel hit-and-run impact scenario with specific parameters, expanding the possible mechanisms for lunar formation.

Findings

Supports the viability of hit-and-run impacts for Moon formation

Identifies key impact parameters influencing debris distribution

Suggests alternative pathways for planetary satellite formation

Abstract

The formation of the Moon from the debris of a slow and grazing giant impact of a Mars-sized impactor on the proto-Earth (Cameron & Ward 1976, Canup & Asphaug 2001) is widely accepted today. We present an alternative scenario with a hit-and-run collision (Asphaug 2010) with a fractionally increased impact velocity and a steeper impact angle.