A CubeSat is a class of miniaturized satellite based around a form factor consisting of 10 cm (3.9 in) cubes. CubeSats have a mass of no more than 2 kg (4.4 lb) per unit, and often use commercial off-the-shelf (COTS) components for their electronics and structure. CubeSats are put into orbit by deployers on the International Space Station, or launched as secondary payloads on a launch vehicle. As of August 2021, more than 1,600 CubeSats have been launched.
A small satellite, miniaturized satellite, or smallsat is a satellite of low mass and size, usually under 1,200 kg (2,600 lb). While all such satellites can be referred to as "small", different classifications are used to categorize them based on mass. Satellites can be built small to reduce the large economic cost of launch vehicles and the costs associated with construction. Miniature satellites, especially in large numbers, may be more useful than fewer, larger ones for some purposes – for example, gathering of scientific data and radio relay. Technical challenges in the construction of small satellites may include the lack of sufficient power storage or of room for a propulsion system.
UWE-1 was one of three CubeSats built by students of the University of Würzburg, launched on 27 October 2005 as part of the European Space Agency's SSETI Express mission from Plesetsk in Russia, orbiting Earth in a 686 km (426 mi) circular orbit. The cube-shaped satellite weighs about 1 kg and has an edge length of 10 cm, which corresponds to the CubeSat standard.
SSETI Express was the first spacecraft to be designed and built by European students and was launched by the European Space Agency. SSETI Express is a small spacecraft, similar in size and shape to a washing machine. On board the student-built spacecraft were three CubeSat picosatellites, extremely small satellites weighing around one kg each. These were deployed one hour and forty minutes after launch. Twenty-one university groups, working from locations spread across Europe and with very different cultural backgrounds, worked together via the internet to jointly create the satellite. The expected lifetime of the mission was planned to be 2 months. SSETI Express encountered an unusually fast mission development: less than 18 months from kick-off in January 2004 to flight-readiness.
Radio Aurora Explorer (RAX) is the first National Science Foundation sponsored CubeSat mission. The RAX mission is a joint effort between SRI International in Menlo Park, California and the University of Michigan in Ann Arbor, Michigan. The chief scientist at SRI International, Dr. Hasan Bahcivan, led his team at SRI to develop the payload while the chief engineer, Dr. James Cutler, led a team of students to develop the satellite bus in the Michigan Exploration Laboratory. There are currently two satellites in the RAX mission.
RAX-2 is a CubeSat satellite built as a collaboration between SRI International and students at the University of Michigan College of Engineering. It is the second spacecraft in the RAX mission. The RAX-1 mission ended after approximately two months of operation due to a gradual degradation of the solar panels that ultimately resulted in a loss of power. RAX team members applied the lessons learned from RAX-1 to the design of a second flight unit, RAX-2, which performs the same mission concept of RAX-1 with improved bus performance and additional operational modes. Science measurements are enhanced through interactive experiments with high power ionospheric heaters where FAI will be generated on demand.
Technology Education Satellite (TechEdSat) is a successful nano-sat flight series conducted from the NASA Ames Research Center in collaboration with numerous universities. While one of the principal aims has been to introduce young professionals and university students to the practical realm of developing space flight hardware, considerable innovations have been introduced. In addition, this evolving flight platform has tested concepts for Low Earth Orbit (LEO) sample return, as well as planetary nano-sat class mission concepts.
PW-Sat is a series of Polish satellites that includes the first Polish artificial satellite which was launched 13 February 2012 from ELA-1 at Guiana Space Centre aboard Italian-built Vega launch vehicle during its maiden voyage. PW-Sat1's mission was to test experimental elastic solar cells, as well as an orbital decay technology consisting of a "tail" designed to speed re-entry. It was expected to last for 1 year.
ESTCube-1 is the first Estonian satellite and first satellite in the world to attempt to use an electric solar wind sail (E-sail). It was launched on 7 May 2013 aboard Vega VV02 carrier rocket and successfully deployed into orbit. The CubeSat standard for nanosatellites was followed during the engineering of ESTCube-1, resulting in a 10×10×11.35 cm cube, with a volume of 1 liter and a mass of 1.048 kg.
A PocketQube is a type of miniaturized satellite for space research that usually has a size of 5 cm cubed, has a mass of no more than 250 grams, and typically uses commercial off-the-shelf components for its electronics.
NUTS-1 was a Norwegian 2U CubeSat created by the NUTS student satellite project at the Norwegian University of Science and Technology (NTNU). The satellite was developed by students from several engineering and science disciplines. It was one of three CubeSats part of the Norwegian student space program ANSAT, the other two are the CubeStar and the HiNCube. From NTNUs CubeSat projects NUTS-1 is a successor of the nCube-1 and nCube-2 projects. The mission was stopped, and the small satellite activities are continued by the Orbit NTNU student organization and the HYPSO mission from NTNU Small Satellite Lab.
Mars Cube One was a Mars flyby mission launched on 5 May 2018 alongside NASA's InSight Mars lander. It consisted of two nanospacecraft, MarCO-A and MarCO-B, that provided real-time communications to Earth for InSight during its entry, descent, and landing (EDL) on 26 November 2018 - when InSight was out of line of sight from the Earth. Both spacecraft were 6U CubeSats designed to test miniaturized communications and navigation technologies. These were the first CubeSats to operate beyond Earth orbit, and aside from telecommunications they also tested CubeSats' endurance in deep space. On 5 February 2019, NASA reported that both the CubeSats had gone silent by 5 January 2019, and are unlikely to be heard from again. In August 2019, the CubeSats were honored for their role in the successful landing of the InSight lander on Mars.
The University of Georgia Small Satellite Research Laboratory (SSRL), or UGA SSRL, is a research laboratory founded in late 2015 with the goal of launching a student-built spacecraft into low Earth orbit. The SSRL is currently building the University of Georgia's first two satellites. The lab has a Space Act Agreement with the NASA Ames Research Center.
ESTCube-2 is a three-unit CubeSat built by the Estonian Student Satellite Foundation. This is the second satellite in the ESTCube program. The satellite will be completed in the first half of 2022 and is scheduled to be launched in the second half of 2023 from Kourou, French Guiana, with the European Space Agency's Vega launch vehicle.
Educational Launch of Nanosatellites (ELaNa) is an initiative created by NASA to attract and retain students in the science, technology, engineering and mathematics disciplines. The program is managed by the Launch Services Program (LSP) at NASA's Kennedy Space Center in Florida.
IRVINE01 was a 1U CubeSat built by the Irvine CubeSat STEM Program (ICSP), a team of six high schools from Irvine, California. IRVINE01 was an educational mission that gives high school students the experience of building, testing, and controlling a nano-satellite, with the aim of developing interest and talent in the science and engineering fields.
HuskySat-1 is an artificial satellite designed at the University of Washington. It was launched by Cygnus NG-12 from Mid-Atlantic Regional Spaceport Launch Pad 0 on Wallops Island, Virginia to low earth orbit on November 2, 2019. It is a CubeSat, and will demonstrate onboard plasma propulsion and high gain telemetry for low Earth orbit that would be a precursor for an attempt at a larger CubeSat designed for orbital insertion at the Moon.
SpaceX CRS-27, also known as SpX-27, was a Commercial Resupply Service mission to the International Space Station (ISS) launched on 15 March 2023. The mission was contracted by NASA and was flown by SpaceX using Cargo Dragon C209. This was the seventh flight for SpaceX under NASA's CRS Phase 2.
