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NGC 891

NGC 891
Spiralna galaktika NGC 891. Fotografiju ustupio Hunter Wilson
Otkriće
Položaj
Epoha J2000
Zviježđe Andromeda
Udaljenost 27,300,000 svj.g.  (8,400,000 pc)
Rektascenzija 02h 22m 33.0s
Deklinacija +42° 20′ 57.0″
Izgled na našem nebu
Prividna magnituda 10.80
Prividne dimenzije (V) 13.5' x 2.5'
Stvarne osobine objekta
Ostalo
Druge oznake UGC 1831

NGC 891 je spiralna galaktika u zviježđu Andromeda. Nalazi se oko 30 milijuna svjetlosnih godina od nas. Galaksiju je otkrio William Herschell u kolovozu 1783. godine. NGC 891 je član NGC 1023 grupe galaksija u Lokalnom Superjatu. U središtu galaktike nalazi se jezgra od molekularnog vodika. Galaksija se od nas udaljava brzinom od 528 km/s.

Amaterska promatranja

[uredi | uredi kôd]

Galaksija je relativno tamna u manjim astronomskim teleskopima. Veoma je osjetljiva na prozirnost i količinu svjetlosnog zagađenja. U 20 cm teleskopu galaktika se može vidjeti kao tamna traka svjetla. Veći, 30 cm teleskop, na povećanjima iznad 100 puta pokazuje jasno prugu prašine koja dijeli galaksiju na dva dijela. Stariji izvori navode da je prividni sjaj galaktika + 9.90 magnituda, ali noviji izvori stavljaju sjaj na + 10.80 magnituda.

Dio prašnjave pruga snimljen teleskopom Hubble
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NGC 891
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