WASP-55 is aG-type main-sequence star about 954light-years away in the constellationVirgo. The star is much younger than the Sun at approximately1.1+0.8 −0.6 billion years.[8] WASP-55 is similar to the Sun in concentration of heavy elements.[10]
A multiplicity survey in 2016 found one candidate stellar companion to WASP-55 at a projected separation of4.435″±0.018″.[11] Follow-up observations in 2017 were unable to confirm if the suspected companion red dwarf star, with a temperature of3,340±90 K, is gravitationally bound to WASP-55 or not.[12] It was confirmed in 2019 usingGaia DR2 data.[13]
^Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars".Astronomy and Astrophysics.355.Bibcode:2000A&A...355L..27H.
^abLlorente De Andrés, F.; Chavero, C.; de la Reza, R.; Roca-Fàbrega, S.; Cifuentes, C. (2021). "The evolution of lithium in FGK dwarf stars. The lithium-rotation connection and the Li desert".Astronomy and Astrophysics.654.arXiv:2108.05852.Bibcode:2021A&A...654A.137L.doi:10.1051/0004-6361/202141339.
^Evans, D. F.; Southworth, J.; Maxted, P. F. L.; Skottfelt, J.; Hundertmark, M.; Jørgensen, U. G.; Dominik, M.; Alsubai, K. A.; Andersen, M. I.; Bozza, V.; Bramich, D. M.; Burgdorf, M. J.; Ciceri, S.; d'Ago, G.; Figuera Jaimes, R.; Gu, S.-H.; Haugbølle, T.; Hinse, T. C.; Juncher, D.; Kains, N.; Kerins, E.; Korhonen, H.; Kuffmeier, M.; Mancini, L.; Peixinho, N.; Popovas, A.; Rabus, M.; Rahvar, S.; Schmidt, R. W.; et al. (2016), "High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP). I. Lucky imaging observations of 101 systems in the southern hemisphere",Astronomy & Astrophysics,589: A58,arXiv:1603.03274,Bibcode:2016A&A...589A..58E,doi:10.1051/0004-6361/201527970,S2CID14215845
^Evans, D. F.; Southworth, J.; Smalley, B.; Jørgensen, U. G.; Dominik, M.; Andersen, M. I.; Bozza, V.; Bramich, D. M.; Burgdorf, M. J.; Ciceri, S.; d'Ago, G.; Figuera Jaimes, R.; Gu, S.-H.; Hinse, T. C.; Henning, Th.; Hundertmark, M.; Kains, N.; Kerins, E.; Korhonen, H.; Kokotanekova, R.; Kuffmeier, M.; Longa-Peña, P.; Mancini, L.; MacKenzie, J.; Popovas, A.; Rabus, M.; Rahvar, S.; Sajadian, S.; Snodgrass, C.; et al. (2018), "High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP). II. Lucky Imaging results from 2015 and 2016",Astronomy & Astrophysics,610: A20,arXiv:1709.07476,Bibcode:2018A&A...610A..20E,doi:10.1051/0004-6361/201731855,S2CID53400492
^Hellier, Coel; Anderson, D. R.; Collier Cameron, A.; Doyle, A. P.; Fumel, A.; Gillon, M.; Jehin, E.; Lendl, M.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Queloz, D.; Ségransan, D.; Smalley, B.; Smith, A. M. S.; Southworth, J.; Triaud, A. H. M. J.; Udry, S.; West, R. G. (2012), "Seven transiting hot-Jupiters from WASP-South, Euler and TRAPPIST: WASP-47b, WASP-55b, WASP-61b, WASP-62b, WASP-63b, WASP-66b & WASP-67b",Monthly Notices of the Royal Astronomical Society,426 (1):739–750,arXiv:1204.5095,Bibcode:2012MNRAS.426..739H,doi:10.1111/j.1365-2966.2012.21780.x,S2CID54713354
