US EditionLong-Dead Satellite Emits Strong Radio Signal, Puzzling Astronomers
UNITED STATES, JUL 01 – The 30-nanosecond burst detected by ASKAP likely resulted from an electrostatic discharge or micrometeorite impact on the inactive Relay 2 satellite, highlighting risks for aging spacecraft.
- On June 13, 2024, astronomers using the ASKAP telescope in Australia detected a powerful fast radio burst from NASA's inactive Relay 2 satellite orbiting Earth about 4,500 kilometers away.
- The burst originated from the satellite’s electrostatic discharge or possibly a micrometeoroid impact, with static buildup onRelay 2's metal skin considered the main cause.
- Relay 2 launched in 1964, ceased operation by 1967 after its transponders failed, and remained in orbit as space debris until the unexpected burst.
- The radio burst lasted about 30 nanoseconds, with a three-nanosecond main pulse at the detection limit, and astronomers noted that such electrostatic events could be common and hazardous to satellites.
- This observation highlights the need for care distinguishing satellite signals from cosmic sources and suggests further study could improve spacecraft protection against electrostatic discharges in orbit.
65 Articles
65 Articles
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