WASP-55 is aG-type main-sequence star about 980 light-years away. The star is much younger than the Sun at approximately1.1+0.8 −0.6 billion years.[3] WASP-55 is similar to the Sun in concentration of heavy elements.[2]
A multiplicity survey in 2016 found one candidate stellar companion to WASP-55 at a projected separation of4.435″±0.018″.[5] 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.[6]
^abPetigura, Erik A.; Crossfield, Ian J. M.; Isaacson, Howard; Beichman, Charles A.; Christiansen, Jessie L.; Dressing, Courtney D.; Fulton, Benjamin J.; Howard, Andrew W.; Kosiarek, Molly R.; Lépine, Sébastien; Schlieder, Joshua E.; Sinukoff, Evan; Yee, Samuel W. (2017), "PLANET CANDIDATES FROM K2 CAMPAIGNS 5–8 AND FOLLOW-UP OPTICAL SPECTROSCOPY",The Astronomical Journal,155: 21,arXiv:1711.06377,doi:10.3847/1538-3881/aa9b83,S2CID55674757
^abSouthworth, John; Tregloan-Reed, J.; Andersen, M. I.; Calchi Novati, S.; Ciceri, S.; Colque, J. P.; D'Ago, G.; Dominik, M.; Evans, D.; Gu, S. -H.; Herrera-Cruces, A.; Hinse, T. C.; Jorgensen, U. G.; Juncher, D.; Kuffmeier, M.; Mancini, L.; Peixinho, N.; Popovas, A.; Rabus, M.; Skottfelt, J.; Tronsgaard, R.; Unda-Sanzana, E.; Wang, X. -B.; Wertz, O.; Alsubai, K. A.; Andersen, J. M.; Bozza, V.; Bramich, D. M.; Burgdorf, M.; et al. (2015),High-precision photometry by telescope defocussing. VIII. WASP-22, WASP-41, WASP-42 and WASP-55,arXiv:1512.05549,doi:10.1093/mnras/stw279
^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
^Sandford, Emily; Espinoza, Néstor; Brahm, Rafael; Jordán, Andrés (2019), "Estimation of singly-transiting K2 planet periods with Gaia parallaxess",Monthly Notices of the Royal Astronomical Society,489 (3):3149–3161,arXiv:1908.08548,Bibcode:2019MNRAS.489.3149S,doi:10.1093/mnras/stz2348
