# Minerva II Rover-1B

> Hayabusa2 carried three MINERVA-II rovers, which actually use internal rotating masses to "hop" across the surface. Two of the rovers, Rover-1A (HIBOU) and Rover-1B (OWL),

**Wikidata**: [Q112971901](https://www.wikidata.org/wiki/Q112971901)  
**Source**: https://4ort.xyz/entity/minerva-ii-rover-1b

Here’s the structured knowledge entry for **Minerva II Rover-1B**:

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## Summary  
Minerva II Rover-1B (also known as OWL) is a small robotic spacecraft deployed by Japan's Hayabusa2 mission to explore the surface of asteroid Ryugu. It uses an innovative "hopping" mechanism powered by internal rotating masses to move in the asteroid's low-gravity environment. Alongside its twin Rover-1A (HIBOU), it was one of the first successful rovers to operate on an asteroid.

## Key Facts  
- **Aliases**: MINERVA-II1 Rover-1b, OWL, MinervaIIRover1B, Hayabusa2 Minerva 2 Rover 1B  
- **COSPAR ID**: 2014-076G  
- **NSSDCA ID**: 2014-076G  
- **Instance of**: Robotic spacecraft  
- **Launch date**: December 3, 2014  
- **Launch site**: Tanegashima, Japan  
- **Launch vehicle**: H-IIA rocket  
- **Mission**: Part of Hayabusa2's asteroid exploration program  
- **Mobility**: Uses internal rotating masses to "hop" across surfaces  

## FAQs  
### Q: How does Minerva II Rover-1B move on an asteroid?  
A: It employs an internal rotating mass mechanism to generate hops, allowing it to traverse Ryugu's low-gravity surface efficiently.  

### Q: What was the purpose of Minerva II Rover-1B?  
A: It was designed to study Ryugu's surface composition, topography, and thermal properties to support Hayabusa2's sample-return mission.  

### Q: How many rovers did Hayabusa2 deploy?  
A: Hayabusa2 carried three MINERVA-II rovers, including Rover-1A (HIBOU) and Rover-1B (OWL).  

## Why It Matters  
Minerva II Rover-1B represents a significant advancement in asteroid exploration technology. Its successful deployment on Ryugu marked the first time multiple rovers operated on an asteroid, providing critical data on surface conditions and composition. The rover's innovative hopping mechanism demonstrated a practical solution for mobility in microgravity environments, influencing future planetary exploration missions. By contributing to Hayabusa2's mission, Rover-1B helped scientists better understand primitive solar system bodies, offering insights into the origins of water and organic materials on Earth.  

## Notable For  
- **First successful asteroid rovers**: Among the first to operate on Ryugu alongside Rover-1A.  
- **Unique mobility**: Uses hopping instead of wheels or treads due to Ryugu's low gravity.  
- **Scientific contributions**: Provided surface data aiding Hayabusa2's sample collection.  

## Body  
### Deployment and Mission  
- Launched aboard Hayabusa2 on December 3, 2014, from Tanegashima Space Center.  
- Deployed to asteroid Ryugu in 2018 as part of Hayabusa2's exploration phase.  

### Design and Mobility  
- **Mobility mechanism**: Relies on internal rotating masses to generate hops, enabling movement in microgravity.  
- **Size and weight**: Compact design optimized for space constraints and low-gravity operation.  

### Scientific Role  
- Conducted surface imaging and thermal measurements.  
- Supported Hayabusa2's primary goal of collecting and returning asteroid samples to Earth.  

### Legacy  
- Pioneered small-scale robotic exploration of asteroids.  
- Provided a model for future microgravity mobility solutions.  

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