  Investigation of spectra from the Sloan Digital Sky Survey reveals the
presence of a region of ionized gas of >2 degrees diameter centered
approximately at alpha = 10^h 37^m delta = -00^o 18' (J2000) (Galactic
coordinates l=248, b=+48). [OIII] 4959,5007 emission is particularly strong and
emission from H-alpha and [NII] 6548,6583 is also detectable over a substantial
area on the sky. The combination of emission line ratios, the close to zero
heliocentric radial velocity and the morphology of the structure are consistent
with an identification as a very nearby planetary nebula. The proximity of the
hot, DO white dwarf PG1034+001 further strengthens this interpretation. The
object is: i) the largest planetary nebula on the sky, ii) certainly closer
than any planetary nebula other than Sh 2--216, iii) the first to be
unambiguously associated with a DO white dwarf. A parallax distance for
PG1034+001 would establish whether the structure is in fact the closest, and
one of the physically largest, planetary nebula known.
