UPDATE 1-N.Korea plans second rocket launch in December

* North Korea to launch satellite between Dec. 10 and Dec. 22

* Second launch this year

* Launch comes as South Korea holds presidential polls

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SEOUL, Dec 1 (Reuters) - North Korea is to carry out its second rocket launch this year in December as South Korea holds its presidential election in a move that will likely trigger diplomatic tensions between the two Koreas and censure from the United States and Japan.

State news agency KCNA said on Saturday that the launch of a rocket carrying a satellite would take place between Dec. 10 and Dec. 22.

North Korea says its launches are for peaceful purposes, although Washington and Seoul believe the isolated, impoverished state is testing long-range missile technology with the aim of developing an intercontinental ballistic missile capable of carrying a nuclear warhead.

North Korea undertook a similar launch in April that was aborted a few minutes into its mission. The North is banned from conducting missile or nuclear-related activities under United Nations resolutions.

The coming launch will take place around the time of South Korea's presidential polls on Dec. 19 and close to the first anniversary of the death of former leader Kim Jong-il.

Kim died on Dec. 17 last year and was succeeded by his son, Kim Jong-un.

(Reporting by David Chance and John Ruwitch; Editing by Ron Popeski)

((john.ruwitch@thomsonreuters.com)( 86 21 6104 1786)(Reuters Messaging: john.ruwitch.thomsonreuters.com@reuters.net))