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GS Paper 3:
Topics Covered: Awareness in space.
Context:
Just two weeks after its launch, NASA’s Double Asteroid Redirection Test (DART) spacecraft has opened its “eye” and returned its first images from space — a major operational milestone for the spacecraft and DART team.
- DART will reach its target on September 26, 2022.
About DART Mission:
- The main aim of the mission is to test the newly developed technology that would allow a spacecraft to crash into an asteroid and change its course.
- DART is a low-cost spacecraft, weighing around 610 kg at launch and 550 kg during impact.
- It also carries about 10 kg of xenon which will be used to demonstrate the agency’s new thrusters called NASA Evolutionary Xenon Thruster–Commercial (NEXT-C) in space.
- The spacecraft carries a high-resolution imager called Didymos Reconnaissance and Asteroid Camera for Optical Navigation (DRACO). Images from DRACO will be sent to Earth in real-time and will help study the impact site and surface of Dimorphos.
- DART will also carry a small satellite or CubeSat named LICIACube (Light Italian CubeSat for Imaging of Asteroids). LICIACube is expected to capture images of the impact and the impact crater formed as a result of the collision. It can also capture images of any dust cloud formed during the impact.
Which asteroid will be deflected?
The target of the spacecraft is a small moonlet called Dimorphos (Greek for “two forms”). It is about 160-metre in diameter and the spacecraft is expected to collide when it is 11 million kilometres away from Earth.
Dimorphos orbits a larger asteroid named Didymos (Greek for “twin”) which has a diameter of 780 metres.
The plan:
The spacecraft will navigate to the moonlet and intentionally collide with it at a speed of about 6.6 kilometres per second or 24,000 kilometres per hour. The collision is expected to take place between September 26 and October 1, 2022.
Insta Curious:
What are potentially hazardous asteroids (PHAs)? Reference: read this.
InstaLinks:
Prelims Link:
- What are near earth objects?
- Classification of asteroids.
- Why most asteroids are found in the asteroid belt between Mars and Jupiter?
- What are potentially hazardous asteroids? How are they classified?
- Overview of NASA’s DART Mission.
Mains Link:
Differentiate between meteorite and asteroid.
Sources: Indian Express.
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