Planetary nebula K1-9

The object K1-9 with strong [ N II] emission lines was included in the Perek and Kohoutek Catalogue of Planetary Nebulae, but later it was considered to be an H IIregion. Our results show that in addition to the low-excitation emissions there are He IIand [ O III] emission lines in its spectrum, and the effective temperature of the central star is more than 54 000  K. Thus we conclude that K1-9 is indeed a planetary nebula. Distribution of [ O III] and [ N II] emission lines reflect a ring-like structure with a clear minimum in the centre of the nebula. Hydrogen lines almost fail to show the central gap. K1-9 has the backward proper motion with systemic velocity RV = 60.2 km s -1. The central hydrogen component moves relative to the nebula with a pecular velocity of about -50 km s -1.