HD 164712, also known as HR 6731 is an orange hued star located in the southern constellation of Apus. It has an apparent magnitude of 5.86,[2] making it faintly visible to the naked eye if viewed under ideal conditions. Parallax measurements place the object at a distance of 229 light-years (70 pc),[1] and it is currently receding with a heliocentric radial velocity of 14.8 km/s.[6]
HR 6731 has two faint companions. Component B is a 13th magnitude object separated 24.6″ away along a position angle of 299°.[15] Component C is a 14th magnitude star 18.1″ away along a position angle of 109°.[15] The first one is a background object while the other one appears to be physically related.[15] As for HD 164712, it shows indications of an infrared excess, suggesting there may be a dusty disk in orbit around the star.[16][17]
^Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations −90° to −53°. Bibcode:1975mcts.book.....H.
^ abJohnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
^Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode:1879RNAO....1.....G.