# Sentinel (space telescope)

> killer asteroid detector canceled as of 2017

**Wikidata**: [Q15727871](https://www.wikidata.org/wiki/Q15727871)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Sentinel_Space_Telescope)  
**Source**: https://4ort.xyz/entity/sentinel-space-telescope

## Summary
The Sentinel Space Telescope was a proposed space telescope designed to detect potentially hazardous asteroids, but it was canceled in 2017. It was classified as a space telescope, an instrument in outer space for observing distant space objects.

## Key Facts
- **Instance of**: Space telescope
- **Cancellation date**: 2017
- **Primary purpose**: Detection of potentially hazardous asteroids
- **Wikidata ID**: Q21608855
- **Wikipedia title**: Sentinel Space Telescope
- **Commons category**: Sentinel Space Telescope
- **Available languages**: English, Persian, French, Portuguese

## FAQs
### Q: What was the Sentinel Space Telescope?
A: The Sentinel Space Telescope was a proposed space telescope designed to detect and track near-Earth asteroids that could pose a threat to Earth.

### Q: Why was the Sentinel Space Telescope canceled?
A: The project was canceled in 2017, though specific reasons were not provided in the source material.

### Q: Was the Sentinel Space Telescope ever launched?
A: No, the telescope was never launched due to its cancellation in 2017.

### Q: What type of telescope was the Sentinel Space Telescope?
A: It was classified as a space telescope, an instrument used to observe distant space objects from outer space.

### Q: Are there any other space telescopes like the Sentinel Space Telescope?
A: Yes, other space telescopes exist, such as the Hubble Space Telescope and the James Webb Space Telescope, which are also designed for astronomical observations.

## Why It Matters
The Sentinel Space Telescope was intended to play a crucial role in planetary defense by identifying and tracking near-Earth asteroids that could potentially collide with Earth. Such a system would have provided early warning and data to mitigate potential impacts. However, its cancellation in 2017 left a gap in asteroid detection capabilities. The project highlights the challenges and complexities involved in funding and executing large-scale space missions, particularly those focused on planetary defense. While the telescope was not realized, its proposed existence underscores the ongoing need for advanced asteroid detection systems to protect Earth from potential cosmic threats.

## Notable For
- **Asteroid detection**: Designed to identify and track near-Earth asteroids.
- **Planetary defense**: Intended to contribute to efforts to protect Earth from asteroid impacts.
- **Space telescope classification**: One of several space telescopes used for astronomical observations.
- **Cancellation in 2017**: Marked the end of a proposed mission without achieving its objectives.

## Body
### Overview
The Sentinel Space Telescope was a proposed space telescope aimed at detecting and tracking near-Earth asteroids. It was classified as a space telescope, an instrument used to observe distant space objects from outer space. The project was canceled in 2017, meaning it was never launched or operational.

### Purpose and Function
The primary purpose of the Sentinel Space Telescope was to identify and track potentially hazardous asteroids that could pose a threat to Earth. Such a system would have provided early warning and data to mitigate potential impacts, contributing to planetary defense efforts.

### Classification and Type
The Sentinel Space Telescope was classified as a space telescope, a type of instrument used for observing distant space objects from outer space. This classification aligns with other space telescopes, such as the Hubble Space Telescope and the James Webb Space Telescope.

### Cancellation and Status
The Sentinel Space Telescope was canceled in 2017, meaning it was never launched or operational. The cancellation marked the end of a proposed mission without achieving its objectives. The specific reasons for the cancellation were not provided in the source material.

### Availability and Documentation
The Sentinel Space Telescope is documented in English, Persian, French, and Portuguese Wikipedia articles. It is also referenced in the Commons category "Sentinel Space Telescope" and has a Wikidata entry with additional details.