  Supernova (SN) H0pe is a gravitationally lensed, triply-imaged, Type Ia SN
(SN Ia) discovered in James Webb Space Telescope imaging of the PLCK
G165.7+67.0 cluster of galaxies. Well-observed multiply-imaged SNe provide a
rare opportunity to constrain the Hubble constant ($H_0$), by measuring the
relative time delay between the images and modeling the foreground mass
distribution. SN H0pe is located at $z=1.783$, and is the first SN Ia with
sufficient light curve sampling and long enough time delays for an $H_0$
inference. Here we present photometric time-delay measurements and SN
properties of SN H0pe. Using JWST/NIRCam photometry we measure time delays of
$\Delta t_{ab}=-116.6^{+10.8}_{-9.3}$ and $\Delta t_{cb}=-48.6^{+3.6}_{-4.0}$
observer-frame days relative to the last image to arrive (image 2b; all
uncertainties are $1\sigma$), which corresponds to a $\sim5.6\%$ uncertainty
contribution for $H_0$ assuming $70 \rm{km s^{-1} Mpc^{-1}}$. We also constrain
the absolute magnification of each image to $\mu_{a}=4.3^{+1.6}_{-1.8}$,
$\mu_{b}=7.6^{+3.6}_{-2.6}$, $\mu_{c}=6.4^{+1.6}_{-1.5}$ by comparing the
observed peak near-IR magnitude of SN H0pe to the non-lensed population of SNe
Ia.
