On Halloween night, a skull-shaped comet nicknamed “Great Pumpkin” treated scientists and sky-watchers alike as it made a close pass by the earth.

The comet, 2015 TB145, streaked by around 1 p.m. EDT Saturday, reports Earth Sky. Scientists believe that it has likely shed its volatiles after passing by the sun numerous times, making it a “dead” comet - fitting for the spookiest day of the year.

The image above shows asteroid 2015 TB145, a dead comet.

(NAIC-Arecibo/NSF)

According to Space.com, scientists captured on Oct. 30 with the Arecibo Observatory in Puerto Rico. The comet’s un-even surface gives it the appearance of a skull.

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The proximity of the TB145's passing allowed scientists to see that it was . The Arecibo images also reveal that the comet has a spherical shape and is approximately 2,000 feet in diameter.

NASA observed the object with the use of its Infrared Telescope Facility (IRTF) in Mauna Kea, Hawaii. Scientists used a 110-foot wide antenna at NASA’s Deep Space Network Facility to , which came back to Earth and were collected with the Green Bank Telescope in West Virginia and the Arecibo Observatory.

“This would generate a 6-mile wide crater if it were to hit the Earth, something of this size and speed,” said Sandia National Laboratories physicist Mark Boslough in a .

TB145 was , traveling at an “unusually high” velocity of nearly 22 miles per second, making it difficult to spot.

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