KSAT-2, also known as Hayato-2 was a Japanese satellite constructed by Kagoshima University as a reflight of its KSAT mission. It has a size of 10 x 10 x 10 cm (without extendible antenna boom) and is built around a standard 1U CubeSat satellite bus. The primary satellite payload is a radio-frequency water vapor detector for climatology research.

KSAT-2

Names	Hayato-2
Mission type	Technology demonstration Atmospheric research
Operator	Kagoshima University
COSPAR ID	2014-009G
SATCAT no.	39578
Website	leo.sci.kagoshima-u.ac.jp/~n-lab/KSAT-HP/Ksat2_E.html
Mission duration	80 days (achieved)
Spacecraft properties
Spacecraft	CubeSat
Bus	1U CubeSat
Manufacturer	Kagoshima University
Launch mass	1.5 kg (3.3 lb)
Dimensions	10 cm × 10 cm × 10 cm (3.9 in × 3.9 in × 3.9 in)
Power	2 deployable fixed solar panels, solar cells and batteries
Start of mission
Launch date	27 February 2014, 18:37 UTC[1]
Rocket	H-IIA (202)
Launch site	Tanegashima, Yoshinobu 1
Contractor	Mitsubishi Heavy Industries
End of mission
Decay date	18 May 2014
Orbital parameters
Reference system	Geocentric orbit[2]
Regime	Low Earth orbit
Perigee altitude	382 km (237 mi)
Apogee altitude	389 km (242 mi)
Inclination	65.01°
Period	92.26 minutes