A little more space, please. (prompt 'epoch')

Close Enough

. . .

"But can't you do anything?"

The Doctor wasn't paying attention, not even to the disturbing image; a looming renegade asteroid. "Now where …?" he murmured.

Sarah-Jane abruptly windmilled as he lunged to the console, punching buttons. "Ecliptic coordinates! I can set them using the celestial measurements of the…" He paused and rolled his eyes significantly. "Well…of course it's only approximate, but that's the drawback to any epoch."

"What in the world are you talking about?"

He pulled a lever. A blinking box shot out, intercepting the rogue. There was a stunning explosion.

"Close, close," he smiled. "Not bad at all."