NGC 4139 (also IC 2989, MCG 0-31-30 and PGC 38213) is a magnitude +13.7 barred spiral galaxy located 257 million light-years away in the constellation Virgo.
The galaxy was discovered by German astronomer Heinrich Louis d'Arrest using a 27.94 cm (11 inch) f/17.5 refractor at the Copenhagen Observatory on the 10th August 1863. The galaxy was rediscovered by Guillaume Bigourdan in March 1895 and relisted as IC 2989.
Right Ascension 12h 04m 34.0s, Declination +01° 48' 0"
