What ship or spacecraft was the "USM AURIGA"?

Answer 1

Based on evidence from ‘The Making of Alien : Resurrection’. It states the Auriga is 12000 feet long.

USM Auriga


The USM Auriga cruises past Jupiter en route to Earth - 2381

LENGTH – 3658 m (12000')
WIDTH – 718 m (2355')
HEIGHT – 628 m (2060')

SPEED - 0.08 light years per sidereal day (intrasystem); interstellar speed CLASSIFIED.

The Auriga is the largest ship ever seen in the Alien films and is something of labyrinth. Going by the ‘4 metres per deck rule’ we’re left with over 150 decks. However the Auriga has a lot of taller rooms eg. The rec-room is about 2-3 decks high as is Ripley’s cell and the Alien observation chamber. The Auriga would also have extra thick hull plating, being a military ship with stealth run capability. It would not be unreasonable to assume the Auriga has at least 100 decks.

It also interesting to note that a ship the size of the Auriga would cause cataclysmic damage if it crashed into Africa at full speed. A 200 ft rock is supposed to have exploded over Tunguska in Siberia in 1908 causing incredible damage (if it had been a populated area, hundred of thousands would have been killed). Ripley comments that Call has ‘saved the world’, but if something the size of the Auriga (about 60 times larger than the Tunguska rock) hit the Earth we’d be talking about an explosion of Armegeddon level proportions and ‘adios muchachos’. One possible explanantion is that Call programmed ‘Father’ to slow the ship down to a less destructive speed before it crashed.

Rough calculations suggest a known FTL speed of 3,169,777,333.333 KMH (or 52,829,622.222 KM/Min). Based on a distance of 47.67 AU (about 7,131,999,000 km) from Pluto to Earth and 135 minutes travel time. Calculations are open to conjecture.

Answer 2

lol...it was the fictitious space ship where they did the experiments in "Alien Resurrection" the 4th installment in the Alien movies.

Now there is also a constellation called Auriga just to make this relevant to Astronomy :)