HR 5171

HR 5171 is a yellow hypergiant star, and the largest of its type. Its size is over 1,300^[1] (or 1,500)^[2] times larger and 630,000 times brighter^[1] than the Sun. It is orbited by a smaller yellow hypergiant and a blue star.

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  Possible impression.
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References

1. Vanzi, L.; Curé, M.; Arcos, C.; Whitelock, P. A.; Tekola, A. G.; Oudmaijer, R. D.; Otero, S.; Nardetto, N.; Lobel, A. (2014-03-01). "The yellow hypergiant HR 5171 A: Resolving a massive interacting binary in the common envelope phase". Astronomy & Astrophysics. 563: A71. arXiv:1401.2628. Bibcode:2014A&A...563A..71C. doi:10.1051/0004-6361/201322421. ISSN 1432-0746. S2CID 52108686.
2. Sanchez-Bermudez, J.; Mohamed, S.; Millour, F.; Meilland, A.; Hofmann, K.-H.; Wit, W. J. de; Alberdi, A.; Marcaide, J. M.; Guirado, J. C. (2017-10-01). "Multi-epoch VLTI-PIONIER imaging of the supergiant V766 Cen - Image of the close companion in front of the primary". Astronomy & Astrophysics. 606: L1. doi:10.1051/0004-6361/201731569. ISSN 1432-0746. S2CID 54740936.