OPUSAT

{{refimprove|date=June 2014}}

{{Infobox spaceflight

| name = OPUSAT

| image =

| image_caption =

| mission_type = Technology

| operator = Osaka Prefecture University

| website = {{url|http://www.sssrc.aero.osakafu-u.ac.jp/E_SSSRC_HP/projects/OPUSAT/home.html}}

| COSPAR_ID = 2014-009D

| SATCAT = 39575

| mission_duration =

| spacecraft_type = 1U CubeSat

| manufacturer = Osaka Prefecture University

| launch_mass = {{convert|1.4|kg|lb}}

| power =

| launch_date = {{start-date|27 February 2014, 18:37|timezone=yes}} UTC{{cite web|url=http://planet4589.org/space/log/launchlog.txt|title=Launch Log|first=Jonathan|last=McDowell|author-link=Jonathan McDowell|work=Jonathan's Space Page|access-date=1 January 2015}}

| launch_rocket = H-IIA 202

| launch_site = Tanegashima Yoshinobu 1

| launch_contractor = Mitsubishi

| decay_date = {{end-date|24 July 2014}}

| orbit_epoch = 28 February 2014{{cite web|url=http://planet4589.org/space/log/satcat.txt|title=Satellite Catalog|first=Jonathan|last=McDowell|work=Jonathan's Space Page|access-date=1 January 2015}}

| orbit_reference = Geocentric

| orbit_regime = Low Earth

| orbit_periapsis = {{convert|383|km|mi}}

| orbit_apoapsis = {{convert|389|km|mi}}

| orbit_inclination = 65 degrees

| orbit_period = 92.27 minutes

| apsis = gee

}}

The Osaka Prefecture University Satellite, or OPUSAT was a technology demonstration cubesat built and operated by Japan's Osaka Prefecture University. It had a size of 100x100x100mm (without antennas and solar paddles) and build around a standard 1U cubesat bus. The primary satellite purpose was the space testing of the power system based on a Lithium-ion capacitor. The tests were largely successful, and it finished operation by reentry to Earth atmosphere on 24 July 2014. The OPUSAT was a development successor to “Maido Ichigo” satellite by East Osaka Craftmen Astro-Technology SOHLA in Osaka.