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NGC 21

NGC 21
Opazovalni podatki (epoha J2000,0)
OzvezdjeAndromeda
Rektascenzija00h 10m 40,90s [1]
Deklinacija+32° 58′ 59,0″ [1]
Rdeči premik0,015911 ± 0,000013 [2]
Helioc. radialna hitrost+4770 ± 4 [2]
Oddaljenost201,24 Msv. l. [2]
Navidezni sij (V)13,51 [2]
Značilnosti
TipSAB(s)bc:[2]
Navidezna velikost (V)1′,7 × 0′,8 [2]
Druge oznake
NGC 29, GC 14, UGC 100, PGC 767, MCG +05-01-048, CGCG 499.66, IRAS 00082+3304, KAZ 19, Swift II, h 6, H 2.853
Glej tudi: galaksija, seznam galaksij

NGC 21 je vmesna spiralna galaksija v ozvezdju Andromede. Njen navidezni sij je 13,51m. Od Sonca je oddaljena približno 61,7 milijonov parsekov, oziroma 201,24 milijona svetlobnih let.

Galaksijo je odkril William Herschel 26. novembra 1790. Opazoval jo je tudi Lewis A. Swift 20. septembra 1885. V Novem splošnem katalogu je tako dobila dve oznaki: NGC 21 (Swiftovo opazovanje) in NGC 29 (Herschlovo opazovanje).

Sklici

[uredi | uredi kodo]
  1. 1,0 1,1 »NGC 21«. SKY-MAP.ORG (v angleščini). Pridobljeno 21. septembra 2008.
  2. 2,0 2,1 2,2 2,3 2,4 2,5 »Zunajgalaktična podatkovna baza NASA/IPAC (NED)«. Podatki za NGC 21 (v angleščini). Pridobljeno 21. septembra 2008.

Zunanje povezave

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NGC 21
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