NGC 5474

NGC 5474
Galaxie NGC 5474 na snímku z přehlídky SDSS
Galaxie NGC 5474 na snímku z přehlídky SDSS
Pozorovací údaje
(Ekvinokcium J2000,0)
Typtrpasličí spirální galaxie a zdroj infračerveného záření
TřídaSA(s)cd pec[1]
ObjevitelWilliam Herschel
Datum objevu1. května 1788
Rektascenze14h 5m 1,6s[1]
Deklinace+53°39′44″[1]
SouhvězdíVelká medvědice (lat. UMa)
Zdánlivá magnituda (V)10,79[2], 11,28[2], 10,232[3], 9,563[3] a 9,484[3]
Úhlová velikost4,7′×4,7′[4]
Vzdálenost6,98 Mpc[5] (22,8 M[5] ly)
Plošná jasnost13,8[4]
Rudý posuv0,000 924
Kupa galaxiíSkupina galaxií M 101, LGG 371[6]
Označení v katalozích
New General CatalogueNGC 5474
IRASIRAS F14032+5353 a IRAS 14032+5353
Uppsala General CatalogueUGC 9013
Principal Galaxies CataloguePGC 50216
Jiná označeníNGC 5474, UGC 9013, PGC 50216
(V) – měření provedena ve viditelném světle
Některá data mohou pocházet z datové položky.

NGC 5474 je pekuliární spirální galaxie v souhvězdí Velké medvědice. Objevil ji William Herschel 1. května 1788.[7] Od Země je vzdálená přibližně 22,8 milionů světelných let[5] a je členem Skupiny galaxií M 101.[6][8] Při svém rozměru kolem 30 000 světelných let[9] se může řadit mezi trpasličí galaxie.[10]

Pozorování

Tato galaxie leží asi 1° jihovýchodně od středu galaxie Větrník a právě těsná blízkost a vzájemné gravitační ovlivňování těchto dvou galaxií jsou pravděpodobně důvodem nesouměrného tvaru NGC 5474. V malých hvězdářských dalekohledech je viditelné nanejvýš jasné jádro této galaxie, střední dalekohledy ji ukážou jako mlhavou skvrnku a větší dalekohledy ukážou jižně od jádra část jejího disku.[9]

Reference

  1. ↑ a b c NASA/IPAC Extragalactic Database: Results for NGC 5474 [online]. [cit. 2020-03-23]. Dostupné online. (anglicky) 
  2. ↑ a b Armando Gil de Paz, Luciana Bianchi, Patrick Morrissey, Samuel Boissier, David Schiminovich, Barry F. Madore, David Thilker, Timothy Heckman, Alessandro Boselli, Robert Rich, Alex Szalay, Mark Seibert, Todd A. Small, Bruno Milliard, Tim Conrow, Soo-Chang Rey, Sukyoung Yi, Young-Wook Lee, Susan G. Neff: The GALEX Ultraviolet Atlas of Nearby Galaxies. In: The Astrophysical Journal Supplement Series. prosinec 2007. DOI 10.1086/516636.
  3. ↑ a b c Thomas H. Jarrett, John M. Carpenter, John E. Gizis, Carol Lonsdale: The Two Micron All Sky Survey (2MASS). In: The Astronomical Journal. únor 2006. DOI 10.1086/498708.
  4. ↑ a b FROMMERT, Hartmut. Revised NGC Data for NGC 5474 [online]. SEDS.org [cit. 2020-03-23]. Dostupné online. (anglicky) 
  5. ↑ a b c TULLY, R. Brent; COURTOIS, Hélène M.; SORCE, Jenny G. Cosmicflows-3. S. 21. Astronomical Journal [online]. Srpen 2016 [cit. 2020-03-23]. Roč. 152, čís. 2, s. 21. Dostupné online. DOI 10.3847/0004-6256/152/2/50. Bibcode 2016AJ....152...50T. (anglicky) 
  6. ↑ a b GARCIA, A. General study of group membership. II - Determination of nearby groups. S. 47–90. Astronomy and Astrophysics Supplement [online]. Červenec 1993 [cit. 2020-03-23]. Roč. 100, s. 47–90. Dostupné online. Bibcode 1993A&AS..100...47G. (anglicky) 
  7. ↑ SELIGMAN, Courtney. Celestial Atlas: NGC 5474 (= PGC 50216) [online]. [cit. 2020-03-23]. Dostupné online. (anglicky) 
  8. ↑ POWELL, Richard. Atlas of the Universe: The M101 Group [online]. [cit. 2020-03-23]. Dostupné online. (anglicky) 
  9. ↑ a b KODRIŠ, Michal. Průvodce hvězdnou oblohou: Velká medvědice [online]. [cit. 2020-03-23]. Dostupné online. 
  10. ↑ A dwarf galaxy ravaged by grand design [online]. spacetelescope.org, 2014-06-16 [cit. 2020-03-23]. Dostupné online. (anglicky) 

Externí odkazy

  • Logo Wikimedia Commons Obrázky, zvuky či videa k tématu NGC 5474 na Wikimedia Commons
  • NASA/IPAC Extragalactic Database: Results for NGC 5474 [online]. [cit. 2020-03-23]. Dostupné online. (anglicky) 
  • SIMBAD Astronomical Database: Results for NGC 5474 [online]. [cit. 2020-03-23]. Dostupné online. (anglicky) 
  • KODRIŠ, Michal. Průvodce hvězdnou oblohou: Velká medvědice [online]. [cit. 2020-03-23]. Dostupné online. 
  • A dwarf galaxy ravaged by grand design [online]. spacetelescope.org, 2014-06-16 [cit. 2020-03-23]. Dostupné online. (anglicky) 
  • Pohled na M101 [online]. NASA, 2019-03-15 [cit. 2020-03-23]. Dostupné online. 
  • FROMMERT, Hartmut. Revised NGC Data for NGC 5474 [online]. SEDS.org [cit. 2020-03-23]. Dostupné online. (anglicky) 
  • SELIGMAN, Courtney. Celestial Atlas: NGC 5474 (= PGC 50216) [online]. [cit. 2020-03-23]. Dostupné online. (anglicky) 

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