ASTRO-G (also known as VSOP-2, and very rarely called VSOP-B) was a planned radio telescope satellite by JAXA.
Funding started from FY 2007 with a budget of 12 billion yen, around 100 million US dollars.
It was planned to be launched in 2012 but technical difficulty with the dish antenna as well as budget constraints led to putting development on hold for fiscal year 2010.
[2][3] Eventually the project was canceled in 2011 for the increased cost and the difficulty of achieving science goals.
[4][5] It was planned to feature a 9 m diameter dish antenna to observe in 8, 22 and 43 GHz bands, and was to be used in combination with ground radio telescopes to perform Very Long Baseline Interferometry.