2MASS J18082002-5104378
{'<entity_0>': 'binary star', '<entity_1>': '2MASS J18082002-5104378', '<entity_2>': 'star', '<entity_3>': 'Ara'}
[['2MASS J18082002-5104378', 'instance of', 'star'], ['2MASS J18082002-5104378', 'instance of', 'binary star'], ['2MASS J18082002-5104378', 'constellation', 'Ara']]
<entity_1> (abbreviated J1808−5104) is an ultra metal-poor (UMP) <entity_0>, in the constellation <entity_3>, about 1,950 ly (600 pc) from Earth, and is a <entity_0> (SB1). It is a <entity_0>, with radial velocity variations in its spectral absorption lines interpreted as orbital motion of the visible <entity_2>.
['binary star', 'star', 'spectroscopic binary star', 'infrared source']