Gaia18dhk Gaia18dhk AT2018hyf 2018-11-04 18:36:05 199.71135 -63.98177 16.82 18.51 0.76 unknown 2018-11-06 15:45:21 star close to Planetary Nebula PN G305.9-01.2 fades and re-brightens over <4 years