5 Vulpeculae is a single,[9] white-hued star in the northern constellation of Vulpecula.[8] It is situated amidst a random concentration of bright stars designated Collinder399,[10] or Brocchi's Cluster. This is a faint star that is just visible to the naked eye with an apparent visual magnitude of 5.60.[5] Based upon an annual parallax shift of 13.8921±0.0900mas,[2] it is located around 235 light years from the Sun. It is moving closer with a heliocentric radial velocity of −21km/s,[5] and will make its closest approach in 2.5 million years at a separation of around 120ly (36.89pc).[1]
A warm debris disk was detected by the Spitzer Space Telescope at a temperature of 206K (−89°F; −67°C), orbiting 13 Astronomical units from the host star.[12] Although this finding has not been directly detected, the emission signature indicates the disk is in the form of a thin ring. The emission displays weak transient absorption features that are indicative of kilometer-sized exocomets that are undergoing evaporation as they approach the host star.[11] These absorption features have been observed to vary on time scales of hours, days, or months.[13]
↑Baumgardt, H. (December 1998), "The nature of some doubtful open clusters as revealed by HIPPARCOS", Astronomy and Astrophysics, 340: 402–414, Bibcode:1998A&A...340..402B.
12Montgomery, Sharon L.; Welsh, Barry Y. (October 2012), "Detection of Variable Gaseous Absorption Features in the Debris Disks Around Young A-type Stars", Publications of the Astronomical Society of the Pacific, 124 (920): 1042, Bibcode:2012PASP..124.1042M, doi:10.1086/668293
↑Montgomery, Sharon L.; Welsh, B.; Lallement, R.; Timbs, B. W. (January 2014), "Exocomet Gas: Now You See It, Now You Don't", American Astronomical Society, AAS Meeting #223, 223: 401.02, Bibcode:2014AAS...22340102M, 401.02.
