Where is Hewett 1, the largest-known planetary nebula mentioned in "See a star die" (February 2005)?
MIKE MCCARVILLE, MAZON, ILLINOIS
The planetary nebula Hewett 1 is about 2° across and is located almost exactly on the celestial equator in Sextans the Sextant at R.A. 10h37m, Dec. 0°18'. The nebula is associated with the very hot white dwarf star PG 1034+001, which has an estimated distance of 500 light-years but with a large uncertainty. The closest known planetary nebula is Sh 2216, with a well-established trigonometric distance of 425 light-years. Measurement of the parallax of PG 1034+001 will determine whether Hewett 1 is in fact closer.