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Dwarf irregular galaxy

NGC 4068

NGC 4068
All data from the card 7
Constellation
Ursa Major
Right ascension
12h 04m 2.49s
Declination
+52° 35′ 26″
Distance
4.36 Mpc (14.2 Mly)
Apparent magnitude (B)
13.3
Type
Dwarf Irregular Galaxy (dIrr)
Size
10,000–12,000 ly (3,100–3,700 pc)

NGC 4068 is an irregular galaxy located 4.36 megaparsecs (14.2 million light-years away in the Ursa Major constellation. It was discovered on 12 April 1789 by William Herschel using a 18.7-inch f/13 speculum reflector telescope.

Characteristics

NGC 4068 is a dwarf irregular galaxy 10,000–12,000 light-years in diameter. As is the case with most observed galaxies of its type, 4068 has low-metallicity. It is currently undergoing a starburst.

Observations

NGC 4068 imaged by the Hubble Space Telescope
NGC 4068 imaged by the Hubble Space Telescope

In 2014–2015, researchers using SCORPIO-2 obtained the first two spectroscopic observations of an object later dubbed Object #A. Said object was later observed again twice in 2020 using terahertz time-domain spectroscopy (TDS). Researchers consider the central star in Object #A to be a single star due to TDS observations, excluding the possibility of it being a cluster-ionizing nebula. They hypothesize said star to be 70–80 M☉ and in the late stage of its evolution, with the most likely categorization being a Wolf–Rayet star.

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Text from Wikipedia, CC BY-SA 4.0 · Source article