# ASTRO

> DARPA technology demonstration satellite

**Wikidata**: [Q4654403](https://www.wikidata.org/wiki/Q4654403)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/ASTRO_(satellite))  
**Source**: https://4ort.xyz/entity/astro

## Summary
ASTRO (Autonomous Space Transport Robotic Operations) was a technology demonstration satellite developed by the United States and operated by the Air Force Research Laboratory. Launched in 2007 as part of the DARPA Orbital Express mission, it was designed to test autonomous on-orbit servicing and refueling technologies. The spacecraft operated for several months before being decommissioned in July 2007.

## Key Facts
- **Type:** Technology demonstration spacecraft.
- **Launch Date:** March 9, 2007 (03:10:00 UTC).
- **Launch Vehicle:** Atlas V 401 (AV-013).
- **Launch Site:** Cape Canaveral Space Launch Complex 41.
- **Operator:** Air Force Research Laboratory.
- **Country:** United States.
- **Mission Program:** Part of the Orbital Express program.
- **COSPAR ID:** 2007-006A.
- **Satellite Catalog Number (SCN):** 30772.
- **Mass:** 1,089 kg (launch weight); 952 kg (dry weight).
- **Dimensions:** 1.78 meters high; 1.75 meters in diameter.
- **Solar Array Span:** 5.59 meters.
- **Decommissioned:** July 22, 2007.
- **Orbital Decay:** October 25, 2013.

## FAQs
### Q: What was the primary purpose of the ASTRO satellite?
A: ASTRO was a technology demonstration spacecraft designed to validate technologies for autonomous on-orbit servicing, refueling, and repair of satellites.

### Q: What launch vehicle was used to deploy ASTRO?
A: ASTRO was launched aboard an Atlas V 401 rocket (vehicle code AV-013) from Cape Canaveral Space Launch Complex 41 on March 9, 2007.

### Q: How long did the ASTRO mission last?
A: While the satellite eventually decayed from orbit in 2013, its significant operational demonstration period concluded with its decommissioning on July 22, 2007, roughly four months after launch.

### Q: What were the physical specifications of ASTRO?
A: The spacecraft had a dry weight of 952 kg (2,099 lbs) and a launch weight of 1,089 kg (2,401 lbs). It measured 1.78 meters in height and 1.75 meters in diameter, with a solar array span of 5.59 meters.

## Why It Matters
ASTRO served as the servicing spacecraft component of the Orbital Express program, a pioneering DARPA initiative aimed at revolutionizing satellite logistics. Its primary significance lies in demonstrating the feasibility of autonomous rendezvous, proximity operations, and docking—critical capabilities for on-orbit maintenance, refueling, and assembly. By validating these technologies, ASTRO helped lay the groundwork for future robotic servicing missions, potentially extending the lifespan of valuable space assets and reducing the costs associated with replacing satellites. The mission successfully demonstrated the transfer of fuel and components between spacecraft, marking a major step forward in autonomous space robotics.

## Notable For
- Being a core component of the **Orbital Express** demonstration mission.
- Demonstrating **autonomous on-orbit servicing** and refueling technologies.
- Operating in **low Earth orbit** specifically for technology validation.
- Being equipped with **two spacecraft solar arrays** to power its systems.
- Successfully completing a mission that included **construction** (2003–2005) and **contract awarding** (2002) phases before its 2007 launch.

## Body
### Development and Manufacturing
The ASTRO (Autonomous Space Transport Robotic Operations) spacecraft was a United States technology demonstration satellite manufactured under a contract awarded in 2002. Construction of the spacecraft took place between 2003 and 2005. It was operated by the Air Force Research Laboratory and served as the "servicer" vehicle in the broader Orbital Express program.

### Technical Specifications
ASTRO had a defined structural configuration optimized for its demonstration role:
- **Mass:** The spacecraft had a dry weight of 952 kilograms and a total launch weight of 1,089 kilograms.
- **Dimensions:** It stood 1.78 meters tall with a main body diameter of 1.75 meters.
- **Power:** The vehicle was powered by two solar arrays, providing a total span of 5.59 meters.

### Mission Timeline
The lifecycle of ASTRO involved several key milestones:
- **2002:** Contract awarded for development.
- **2003–2005:** Construction phase.
- **March 9, 2007:** Launched at 03:10:00 UTC via an Atlas V 401 (AV-013) from Cape Canaveral Space Launch Complex 41. It carried the NEXTSat (Next Generation Satellite) as its client vehicle for the demonstration.
- **July 22, 2007:** The spacecraft was decommissioned.
- **October 25, 2013:** ASTRO underwent atmospheric entry and orbital decay after more than six years in low Earth orbit.

## References

1. [Source](https://space.skyrocket.de/doc_sdat/astro.htm)
2. [Source](https://archive.darpa.mil/orbitalexpress/pdf/oe_fact_sheet_final.pdf)
3. Jonathan's Space Report
4. [Source](https://www.n2yo.com/satellite/?s=30772)
5. [Source](https://spaceflightnow.com/news/n0707/23oe/)
6. [Source](https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=2007-006A)