Space Travelers: The Animation is an OVA that was released in 2000. It is a spinoff of the live-action television film Space Travelers.
Synopsis
New Cosmic Century 038, humanity is suddenly attacked by an unknown alien civilization known as the Orbital Ring System. Soon, the entire Earth Civilization Sphere has been cut off from the space colonies, and is under the control of the ORS. Only Hayabusha Jetter, along with his band of misfit space pirates and smugglers, can break through ORS lines.