  I report the discovery of a stellar stream (Sutlej) using Gaia DR3 proper
motions and XP metallicities located ~15 degrees north of the Small Magellanic
Cloud (SMC). The stream is composed of two parallel linear components
("branches") approximately ~8 x 0.6 degrees in size and separated by 2.5
degrees. The stars have a mean proper motion of (pmra,pmdec)=(+0.08
mas/yr,-1.41 mas/yr) which is quite similar to the proper motion of stars on
the western side of the SMC. The color magnitude diagram of the stream stars
has a clear red giant branch, horizontal branch, and main sequence turnoff that
is well-matched by a PARSEC isochrone of 10 Gyr, [Fe/H]=-1.8 at 32 kpc and a
total stellar mass of ~33,000 Msun. The stream is spread out over an area of
9.6 square degrees and has a surface brightness of 32.5 mag/arcsec^2. The
metallicity of the stream stars from Gaia XP spectra extend over -2.5 < [M/H] <
-1.0 with a median of [M/H]=-1.8. The tangential velocity of the stream stars
is 214 km/s compared to the values of 448 km/s for the Large Magellanic Cloud
and 428 km/s for the SMC. While the radial velocity of the stream is not yet
known, a comparison of the space velocities using a range of assumed radial
velocities, shows that the stream is unlikely to be associated with the
Magellanic Clouds. The tangential velocity vector is misaligned with the stream
by ~25 degrees which might indicate an important gravitational influence from
the nearby Magellanic Clouds.
