Astronomy:NGC 7752 and NGC 7753

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Short description: Pair of galaxies in the constellation of Pegasus
NGC 7752 / 7753
NGC7752, NGC7753 - HST - Potw2142a.jpg
NGC 7753 (big) and 7752 (small, bottom left)
Observation data (J2000 epoch)
ConstellationPegasus
Right ascension 23h 46m 58.5s /  23h 47m 04.8s[1]
Declination+29° 27′ 32″ / +29° 29′ 00″[1]
Helio radial velocity5072 ± 5 / 5168 ± 6 km/s[1]
Distance272 Mly[2]
Apparent magnitude (V)15.0 / 12.8[1]
Characteristics
TypeI0 / SAB(rs)bc[1]
Apparent size (V)0.8′ × 0.5′ / 3.3′ × 2.1′[1]
Other designations
UGC 12779 / 12780,[1] PGC 72382 / 72387,[1] Arp 86[1]

NGC 7752 and NGC 7753 are a pair of galaxies approximately 272 million light-years away in the constellation Pegasus.

NGC 7753 is the primary galaxy. It is a barred spiral galaxy with a small nucleus. NGC 7752 is the satellite galaxy of NGC 7753. It is a barred lenticular galaxy that is apparently attached to one of NGC 7753's spiral arms. They resemble the Whirlpool Galaxy (M51A) and its satellite NGC 5195 (M51B).

Supernovae

The first supernova detected in NGC 7753 was SN 2006A in January 2006.[3] It was followed four months later by SN 2006ch, a Type Ia supernova.[3] In January 2013 another Type Ia supernova, SN 2013Q, was detected, and in August 2015 a Type II supernova, SN 2015ae, was discovered.[3]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 "NASA/IPAC Extragalactic Database". Results for NGC 7752 / 7753. http://nedwww.ipac.caltech.edu/. Retrieved 2006-11-21. 
  2. ↑ Normandin, George. "NGC 7753 and NGC 7752 (aka Arp 86): Interacting Galaxies". Archived from the original on 3 March 2016. https://web.archive.org/web/20160303170315/http://www.kopernik.org/images/archive/n7753.htm. Retrieved 30 June 2015. 
  3. ↑ 3.0 3.1 3.2 "List of Supernovae". IAU. http://www.cbat.eps.harvard.edu/lists/Supernovae.html. Retrieved 19 February 2017. 

External links

Coordinates: Sky map 23h 46m 58.5s, +29° 27′ 32″




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