Hayato, known before launch as K-Sat, or the Kagoshima Satellite, is a Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

ese satellite

Satellite

In the context of spaceflight, a satellite is an object which has been placed into orbit by human endeavour. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as the Moon....

 which was launched in May 2010. It is a student-built spacecraft, which is operated by Kagoshima University

Kagoshima University

, or is a Japanese national university located in Kagoshima, Kagoshima Prefecture, Japan.There are three campuses:* Shimoarata: Faculty of Fisheries* Sakuragaoka: Faculty of Medicine...

, and is being used for technology demonstration and remote sensing

Remote sensing

Remote sensing is the acquisition of information about an object or phenomenon, without making physical contact with the object. In modern usage, the term generally refers to the use of aerial sensor technologies to detect and classify objects on Earth by means of propagated signals Remote sensing...

. The satellite is a single unit CubeSat

CubeSat

A CubeSat is a type of miniaturized satellite for space research that usually has a volume of exactly one liter , has a mass of no more than 1.33 kilograms, and typically uses commercial off-the-shelf electronics components...

, and carries equipment to study water vapour in the Earth's atmosphere, microwave imagery and spacecraft communication.

The launch was conducted by Mitsubishi Heavy Industries

Mitsubishi Heavy Industries

, or MHI, is a Japanese company. It is one of the core companies of Mitsubishi Group.-History:In 1870 Yataro Iwasaki, the founder of Mitsubishi took a lease of Government-owned Nagasaki Shipyard. He named it Nagasaki Shipyard & Machinery Works, and started the shipbuilding business on a full scale...

 under contract to the Japan Aerospace Exploration Agency

Japan Aerospace Exploration Agency

The , or JAXA, is Japan's national aerospace agency. Through the merger of three previously independent organizations, JAXA was formed on October 1, 2003, as an Independent Administrative Institution administered by the Ministry of Education, Culture, Sports, Science and Technology and the...

. In preparation for a planned launch on 17 May, the H-IIA rocket was rolled out to Pad 1 of the Yoshinobu Launch Complex

Yoshinobu Launch Complex

The Yoshinobu Launch Complex, also known as Launch Area Y, Area Y or LA-Y, is a launch complex at the Tanegashima Space Centre, used by the H-II and H-IIA carrier rockets. The complex is also used by the H-IIB, which was first launched on 10 September 2009...

 at the Tanegashima Space Centre

Tanegashima Space Center

The is one of Japan's space development facilities. It is located on Tanegashima, an island located 115 km south of Kyūshū. It was established in 1969 when the National Space Development Agency of Japan was formed...

 on 16 May 2010. It departed the assembly building at 21:01 UTC and arriving at the launch pad 24 minutes later at 21:25 UTC. The terminal countdown began at 11:30 UTC on 17 May and by 15:28, the loading of cryogenic propellant into the rocket's first and second stages had been completed. The launch attempt was scrubbed a few minutes before liftoff due to bad weather, but took place successfully at 21:58:22 UTC on 20 May 2010.

Hayato was be deployed from a JAXA Picosatellite Deployer attached to the second stage of the H-IIA

H-IIA

H-IIA is an active expendable launch system operated by Mitsubishi Heavy Industries for the Japan Aerospace Exploration Agency . The liquid-fueled H-IIA rockets have been used to launch satellites into geostationary orbit, to launch a lunar orbiting spacecraft, and to launch an interplanetary...

 202 rocket used in the launch of the Akatsuki spacecraft towards Venus

Venus

Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. The planet is named after Venus, the Roman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent magnitude of −4.6, bright enough to cast shadows...

. K-Sat shared its dispenser with the Negai ☆ satellite, whilst a second dispenser contained Waseda-SAT2

Waseda-SAT2

Waseda-SAT2 is a Japanese satellite which launched in May 2010. It is a student-built spacecraft, which will be operated by Waseda University, and is intended to be used for Earth observation and technology demonstration. It will test the use of extendible paddles to provide attitude control...

. The three CubeSats separated into low Earth orbit

Low Earth orbit

A low Earth orbit is generally defined as an orbit within the locus extending from the Earth’s surface up to an altitude of 2,000 km...

 during a coast phase of the launch, between the first and second burns of the second stage. The rocket then continued to Heliocentric orbit, where it deployed Akatsuki, along with the IKAROS

IKAROS

IKAROS is a Japan Aerospace Exploration Agency experimental spacecraft. The spacecraft was launched on 21 May, 2010, aboard an H-IIA rocket, together with the Akatsuki probe and four other small spacecraft...

 and UNITEC-1 spacecraft.