HD 101584 is a suspected post-common envelope binary about 1,800 to 5,900 light-years distant in the constellation of Centaurus.

[3][5] The system is bright at optical wavelengths with an apparent visual magnitude of about 7.

[3] In 1991, Jean Manfroid et al. published photometry that showed that HD 101584 is a variable star.

[9] The Hubble Space Telescope image shows a diffuse circumstellar environment with a circular ring around HD 101584.

[10] The companion of this system was captured a few hundred years ago, for example when the red giant reached its critical size.