Re-Entry: ETS-7

Photo: NASA
Photo: NASA

The Japanese ETS-7 Engineering Test Satellite, the first uncrewed spacecraft to deploy a robotic arm to space for rendezvous & docking operations, re-entered Earth’s atmosphere after 18 years in orbit.

NORAD ID: 25064
Origin: Japan
Object: ETS-7
Type: Technical Demonstration Mission
Launch Mass: 2,860kg (both satellites)
Inclination: 34.9°
Launched: November 28, 1997

Re-Entry Prediction:November 13, 2015 – 14:36 UTC +/- 7 Minutes
Re-Entry Zone: Asia/Pacific Region

Satellite Description: ETS-7, the Engineering Test Satellite No. 7, was a satellite developed and operated by the National Space Development Agency of Japan for the exploration of robotic technology in satellite mission. A combined system of two satellites with a total mass of 2,860 Kilograms, the ETS-7 was comprised of a target spacecraft and a chase. The chaser was outfitted with a robotic arm to complete a robotic capture of a satellite in orbit. Outfitted with a 2-meter robotic arm, the ETS-7 mission became the first to uncrewed satellite to conduct autonomous docking operations. Originally expected to operate in a 550-Kilometer orbit for one and a half years, ETS-7 conducted successful technical demonstrations of in-space rendezvous and docking. Operations were completed by the end of 1999, but ETS-7 continued to function for another three years, being retired in 2002.

Re-Entry Orbits
Image: Spaceflight101/Orbitron
Image: Spaceflight101/Orbitron