Captain's log - Stardate 2261.588

During routine long range scanning, Chekov reported a anomaly - a mass approximately the size of Earth is now showing in an area we have already charted. Spock has stated that it is inconceivable that his team managed to miss so large of a body, but has conceded that Chekov's readings are correct.

Either something is very wrong with our instruments or there are questions about this planetoid that need answering. I've ordered the helm to take us in slowly with full forward scans in case this is some sort of elaborate trap.