NGC 2440 is a planetary nebula, one of many in our galaxy. Its central star, HD62166, is possibly the hottest known white dwarf. The nebula is situated in the constellation Puppis. It was discovered by William Herschel on March 4, 1790.

Constellation: Puppis

Apparent dimensions (V): 74" × 42"

Apparent magnitude (V): 9.4

Distance: 4.00 kly (1.23 kpc) ly