// ORBITAL LOGISTICS AND PROPULSION TERM

Smallsat

A smallsat is a miniature satellite, typically weighing less than 500 kg, designed for specific missions and often launched in constellations.

Smallsat — illustration from Wikipedia
Image via Wikipedia

TECHNICAL DEFINITION

A Smallsat is a class of artificial satellites with a mass generally below 500 kg, encompassing categories like nanosatellites and microsatellites, designed for cost-effective, specialized missions and often deployed in large constellations.

BACKGROUND

Firefly Aerospace Blue Ghost, or simply Blue Ghost, is a class of lunar landers designed and manufactured by the American company Firefly Aerospace. Firefly builds and operates Blue Ghost landers to deliver small payloads to the surface of the Moon. The first Blue Ghost mission was launched in January, 2025. It successfully landed on the Moon on March 2, 2025. The landers are named after the firefly species Phausis reticulata, known as blue ghosts.

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SYNONYMS & ALIASES

  • Miniature Satellite
  • Micro-satellite
  • Nano-satellite
  • CubeSat (specific type)

USAGE NOTE

Smallsats are enabling new applications in Earth observation, telecommunications, and scientific research due to their lower cost and faster development.

DEVELOPERS

Organizations developing technology related to Smallsat.

  • Planet Labs PBC

    Operates the largest fleet of Earth observation satellites, primarily using smallsats, to image the entire landmass daily and provide data for various industries.

  • Rocket Lab

    Designs, manufactures, and launches small, orbital-class rockets (Electron) dedicated to deploying smallsats, and also develops smallsat platforms.

  • Spire Global

    Operates a large constellation of nanosatellites to collect data for weather forecasting, maritime domain awareness, and aviation intelligence.

  • Terran Orbital Corporation

    A leading manufacturer of small satellites and provider of space-based solutions for government and commercial customers.

  • BlackSky Technology Inc.

    Deploys and operates a constellation of high-revisit-rate smallsats to deliver geospatial intelligence and real-time insights.

  • Momentus Inc.

    Provides in-space infrastructure services, including last-mile delivery and orbital services for smallsats and other spacecraft.

  • Surrey Satellite Technology Ltd (SSTL)

    A world-leading provider of small satellite missions, platforms, and applications, with a long history of innovation in the smallsat sector.

  • Capella Space

    Operates a constellation of synthetic aperture radar (SAR) smallsats, providing high-resolution, all-weather, day and night Earth observation imagery.

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