[as 형 a 명사 as 구문] as common a type as

The “spinning cube” UFO is not as common a type to be reported as the traditional flying saucer or even the black triangle, and yet, it has been captured on video more often lately. Detractors claim it’s little more than a trick of the light, a bird, bug, or balloon captured in pixelated digital video that makes it look like bright, spinning cube. But these spinning cubes have been spotted not just on video, but by eyewitnesses in Ohio, Missouri, and even some pilots claim that the UFOs they have encountered have been of this type. What makes this particular sighting interesting is that the craft appeared in the middle of an airshow, as if was eager to see what we lowly humans have come up with.

출처: Spinning UFO Makes Appearance at Miami Air Show (msn.com)

Spinning UFO Makes Appearance at Miami Air Show
Diana Logan – Yesterday 1:00 PM

So (such) 형용사 a 명사 = 형용사 + 명사와 해석은 같지만, so 가 부사적 역할로 강조. so beautiful a car = such a beautiful car = a very beautiful car

quite, rather 은 a 와 순서 바뀌어도 됨. quite a = a quite