Yuan, WFausnaugh, M.M.Hoffman, Stephen LMacri, Lucas M.Peterson, Bradley MRiess, A GBentz, M CBrown, J. S.Dalla Bonta, EDavies, Richard IOnken, Christopher2022-07-222022-07-220004-637Xhttp://hdl.handle.net/1885/269873We derive a distance of 15.8 +- 0.4 Mpc to the archetypal Seyfert 1 galaxy NGC 4151 based on the near-infrared Cepheid period-luminosity relation and new Hubble Space Telescope multiband imaging. This distance determination, based on measurements of 35 long-period (P > 25 days) Cepheids, will support the absolute calibration of the supermassive black hole mass in this system, as well as studies of the dynamics of the feedback or feeding of its active galactic nucleus.Support for HST program GO-13765 was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. MV gratefully acknowledges support from the Independent Research Fund Denmark via grant number DFF 8021-00130.application/pdfen-AU© 2020. The American Astronomical SocietyCepheid variable starsDistance measureCepheid distanceAGN host galaxiesHubble Space TelescopeHST photometryTime series analysisNear infrared astronomyOptical observatoriesDistance indicatorsGalaxy distances202010.3847/1538-4357/abb3772021-08-01