SOLAR-C

SOLAR-C (official name "High-sensitivity Solar Ultraviolet Spectroscopic Satellite"^[1]) is a planned Sun-observing satellite being developed by the Japan Aerospace Exploration Agency (JAXA), the National Astronomical Observatory of Japan (NAOJ), and international collaborators. It will be the follow-up to the Hinode (SOLAR-B) and Yohkoh (SOLAR-A) missions and will carry the EUV High-throughput Spectroscopic Telescope (EUVST) and the Solar Spectral Irradiance Monitor (SoSpIM).^{[2][3][4][5][6]} It is scheduled to launch in fiscal year 2028.^[7]

SOLAR-C

Names	SOLAR-C High-sensitivity Solar Ultraviolet Spectroscopic Satellite (official)
Mission type	Heliophysics
Operator	Japan Aerospace Exploration Agency (JAXA), National Astronomical Observatory of Japan (NAOJ)
Website	solar-c.nao.ac.jp
Mission duration	2 years (planned)
Spacecraft properties
Launch mass	500 kg (1,100 lb)
Dimensions	4.8 m (16 ft) height
Start of mission
Launch date	2028 (planned)
Rocket	Epsilon S
Orbital parameters
Reference system	Sun-synchronous orbit (>600 km (370 mi))
Instruments EUVST Extreme Ultraviolet High-Throughput Spectroscopic Telescope SoSpIM Solar Spectral Irradiance Monitor

Objectives

The mission aims to study the sun, its effects on Earth and the Solar System, and the mechanisms behind hot plasma formation. The satellite will also analyse the Sun's UV radiation spectrum.^[8][9]