NGC 6622
Hubble Space Telescope image of NGC 6622 (left) and NGC 6621 (center)
Observation data (J2000 epoch)
ConstellationDraco
Right ascension18h 12m 59.50s[1]
Declination+68° 21′ 19.0″[1]
Redshift0.02157±0.00013[1]
Distance313 Mly (96.0 Mpc)[1]
Apparent magnitude (V)15.0[1]
Characteristics
TypeG'Sb[1]
Size219,000 ly
Apparent size (V).955 x .832[1]
Notable featuresN/A
Other designations
KCPG 534A,[1] PGC 61579,[1] KPG 534b,[1] LEDA 61579,[1] UGC 11175 S,[1] UZC J181259.8+682114[1]

NGC 6622 is an interacting spiral galaxy in the constellation Draco.[1] It is located around 313 million light-years away, and it was discovered by Edward D. Swift and Lewis A. Swift on June 2, 1885.[1][2] NGC 6622 interacts with NGC 6621, with their closest approach having taken place about 100 million years before the moment seen now.[3] NGC 6622 and NGC 6621 are included in the Atlas of Peculiar Galaxies as Arp 81 in the category "spiral galaxies with large high surface brightness companions".[4][5]

NGC 6622 is the smaller of the two, and is a very disturbed galaxy.[5][1] The encounter has left NGC 6622 very deformed, as it was once a spiral galaxy.[6][1] The collision has also triggered extensive star formation between the two galaxies.[7] The most intense star formation takes place in the region between the two nuclei, where a large population of luminous clusters, also known as super star clusters, has been observed. At this region is observed the most tidal stress.[6][2] The brightest and bluest clusters are less than 100 million years old[2], with the youngest being less than 10 million years old.[4] The side of the galaxy further from the companion features noticeably less star formation activity.[3][1][7]

References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-01-10.
  2. 1 2 3 "NGC 6622 - Spiral Galaxy in Draco | TheSkyLive.com". theskylive.com. Retrieved 2024-01-10.
  3. 1 2 "NGC 6622 - Galaxy - SKY-MAP". www.wikisky.org. Retrieved 2024-01-10.
  4. 1 2 [email protected]. "NGC 6621, NGC 6622". www.spacetelescope.org. Retrieved 2024-01-10.
  5. 1 2 "Check out what the @NASAHubble Space Telescope looked at on my birthday! #Hubble30". imagine.gsfc.nasa.gov. Retrieved 2024-01-10.
  6. 1 2 "NGC 6621 and NGC 6622 | SkyCenter". skycenter.arizona.edu. Retrieved 2024-01-10.
  7. 1 2 Astronomy, Go. "NGC 6622 | galaxy in Draco | NGC List | GO ASTRONOMY". Go-Astronomy.com. Retrieved 2024-01-10.
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