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Tianwen-2 Mission to Asteroid Kamo'oalewa: Sample Return to Test Lunar Origin Theory

Target:UPSC GS-IIIMPSCSSC GATeachingPrelims HighMains MediumStatic GK Link
04 Jul 2026
~2 min
Source: The Hindu
Key Data:Kamo'oalewa size 30–60 mRotation period 28 minutesClosest approach 12.44 million km (1923)Tianwen-2 launch May 2025Science operations begin July 2026
Bodies:CNSA
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What This Article Covers

1.Tianwen-2, launched by CNSA in May 2025, is now orbiting asteroid 469219 Kamo'oalewa and will begin science operations in July 2026.

2.The asteroid, 30–60 m in size, rotates every 28 minutes, making sample collection challenging.

3.Its origin is debated: spectral data suggest either lunar material or a heavily space-weathered LL chondrite. Sample return will resolve this.

The Big Picture
Prelims · HighMains · Medium

China's Tianwen-2 mission is set to sample asteroid 469219 Kamo'oalewa, a quasi-satellite of Earth that may be a fragment of the Moon. The sample analysis will settle a long-standing debate about its origin and provide insights into the early Earth-Moon system.

Exam Lens

Quick Exam Facts From News

Asteroid Designation469219 Kamo'oalewa
Size30–60 metres across
Rotation Period28 minutes
Closest Approach (1923)12.44 million km from Earth
Mission LaunchMay 2025 (CNSA)
Science Operations BeginJuly 2026

1-Minute Revision

  • ›Asteroid Designation: 469219 Kamo'oalewa
  • ›Size: 30–60 metres across
  • ›Target this Data: Kamo'oalewa size 30–60 m, rotation period 28 minutes
  • ›Target this Nodal Body: China National Space Administration (CNSA)
  • ›Target this Legal Point: Not applicable

Mastered this topic? Test your knowledge with a full MCQ quiz.

Practice exam-style questions, track your score, and strengthen your recall.

Q1Static LinkageEasy

Which space agency is responsible for the Tianwen-2 mission to asteroid Kamo'oalewa?

Q2Statement-basedHard

Consider the following statements regarding the asteroid 469219 Kamo'oalewa:

1. It is a true moon of Earth, gravitationally bound to our planet.

2. It rotates once every 28 minutes, making sample collection challenging.

3. Its orbit around the Sun is expected to remain in lockstep with Earth's for a very long time.

Which of the statements given above is/are correct?

Q3Data-centricMedium

What is the approximate size range of the asteroid 469219 Kamo'oalewa as mentioned in the article?

Q4Application/ImpactMedium

What is the primary scientific value of returning a sample from Kamo'oalewa to Earth?

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