Silent Nork satellite tumbling in orbit
Pyongyang not yet ready to nuke California
North Korean "Earth observation" satellite Kwangmyongsong-4 is "tumbling in orbit", according to US officials, suggesting a second failure by Pyongyang to get a functioning satellite aloft.
Kwangmyongsong-4 launched on Saturday, to widespread international condemnation. The satellite has remained silent - as did its predecessor Kwangmyongsong-3 - which entered orbit back in December 2012.
As we put it yesterday: "The fact that Norks would send an uncommunicative lump into space, with no telemetry or data transmitted to Earth, is one of the reasons the rest of the world suspects the launches are ballistic missile tests."
Both Kwangmyongsongs 3 and 4 were carried aloft by an Unha rocket - a three-stage vehicle initially lifted by four clustered Rodong-1 engines, based on Soviet SS-1 "Scud" powerplants. The second stage may be based on the Soviet R-27 Zyb, but is more likely another adaptation of Scud tech.
The third stage is possibly based on part of Iran's Safir programme.
While it's clear that North Korea is using adapted ICBM tech, it's debatable how much of a military threat its missile capability actually poses. Back in 2013, UK prime minister David Cameron declared that "North Korea has the capability to launch a missile strike against the the US and the UK", following Pyongyang's claim that it had deployed a couple of missiles on its eastern coast "capable of striking South Korea, Japan and US bases in the Pacific".
However, we noted in our 2013 overview of Nork missile tech that the BM25 Musudan in question - a trailer-launched intermediate-range ballistic missile (IRBM) based on the aforementioned R-27 Zyb - was merely theoretically capable of hitting these targets.
Probably not the real deal: Musudans on parade in Pyongyang in October 2010