Starlink Reduces Satellite Altitude to Decrease Collision Risks

Starlink, the satellite internet company, has announced it will reduce the altitude of approximately 4,400 satellites this year. Michael Nicolls, the company's vice president of engineering, confirmed the decision in a post on the X platform. The satellites, which currently orbit at about 550 kilometers, will be lowered to about 480 kilometers. This change aims to minimize the risk of collisions and facilitate rapid deorbiting in case of incidents.

Nicolls explained that "reducing the altitude of the satellites results in a condensation of Starlink's orbits and will increase safety in space." He noted that the approach of the solar minimum—a period in which solar activity decreases—also contributes to this decision. The next solar minimum is expected to occur in the early 2030s.

During the solar minimum, atmospheric density decreases, meaning the time for ballistic decay—the rate at which a satellite loses altitude—will be significantly greater. Nicolls emphasized that, with the reduction in height, the decay time will be reduced by more than 80%, from over four years to just a few months.

This decision comes after a recent incident in which a Starlink satellite suffered an anomaly and generated debris. Additionally, Nicolls had warned about a situation where satellites launched by China were not coordinated with existing satellite operators, increasing collision risks. With this new strategy, the intention is to "further improve the safety of the constellation, especially regarding maneuvers and launches not coordinated with other satellite operators."

These actions by Starlink reflect a growing concern for safety in space as the number of satellites and space activity increases. Reducing altitude could be a significant step in mitigating risks associated with congestion in space.

In the short and long term, Starlink's initiative promises not only to enhance the safety of its operations but also to positively impact other space missions, contributing to a safer environment in space.