T Pyxidis

[6] Evidence seems to indicate that T Pyxidis may have increased in mass despite the nova eruptions, and is now close to the Chandrasekhar limit when it might explode as a supernova.

Because of its relative proximity, some—in particular, Edward Sion, astronomer & astrophysicist at Villanova University, and his team therefrom—contend that a type 1a supernova could have a significant impact on Earth.

"[9] Mankind survived when the radiation from the Crab Nebula supernova, at a distance of about 6,500 light-years, reached Earth in the year 1054.

A type Ia supernova at a distance of 3,300 light-years would have an apparent magnitude of around -9.3, about as bright as the brightest Iridium (satellite) flares.

Astronomers used NASA's Hubble Space Telescope to observe the light emitted during its latest outburst in April 2011.

The location of T Pyxidis (circled in red).
AAVSO light curve of recurrent nova T Pyx from 1 Jan 1966 to 17 Nov 2010. Up is brighter and down is fainter. Day numbers are Julian days . Different colors reflect different bandpasses .
AAVSO light curve of recurrent nova T Pyx from April 13 to May 6, 2011. Up is brighter and down is fainter.