Category

Astronomical objects discovered in 2019

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2I/Borisov, originally designated C/2019 Q4 (Borisov), is the first observed rogue comet and the second observed interstellar interloper, after ʻOumuamua. It was discovered by the Crimean amateur astronomer and telescope maker Gennadiy Borisov on 29 August 2019 UTC (30 August local time) in MARGO Observatory.

C/2019 Y4 (ATLAS)

satellite of Saturn

natural satellite of Saturn

CNEOS 2014-01-08

purported first known interstellar object, meteor that hit Earth on January 8, 2014

C/2019 U6 (LEMMON)

Long period comet

LB-1 is a binary star system in the constellation Gemini. In 2019, a paper in Nature proposed that the system contained an unusually massive stellar black hole outside of ordinary single stellar evolution parameters. However, analyses in 2020 found the original 2019 conclusion to be incorrect. Some researchers now believe the system consists of a stripped B-type star and a massive rapidly rotating Be star.

star in the constellation Cancer

P/2019 LD2 (ATLAS)

Jupiter-family comet

S5-HVS1 is an A-type main-sequence star notable as the fastest one detected as of November 2019, and has been determined to be traveling at , almost 0.6% of the speed of light. The star is in the Grus (or Crane) constellation in the southern sky, and about 29,000 light-years from Earth. According to astronomers, S5-HVS1 was ejected from the Milky Way galaxy after interacting with Sagittarius A*, the supermassive black hole at the center of the galaxy. It is possible that it was originally part of a binary system that was tidally disrupted by the supermassive black hole, causing it to be ejecte

small asteroid which entered Earth's atmosphere in June 2019

Massive neutron star

gamma-ray burst

star in the constellation Scorpius

Centaur (small Solar System body)

Near Earth asteroid