NGC 0021

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NGC 21

Astronesia-NGC 21 (juga dikenal sebagai NGC 29) adalah galaksi spiral di rasi bintang Andromeda.

Galaksi NGC 21 ditemukan pada tanggal 26 November 1790 oleh astronom kelahiran Jerman-Inggris William Herschel. Dan Lewis A. Swift mengamati galaksi ini pada tanggal 20 September 1885. Pengamatan ganda tidak diketahui, dan sebagainya adalah obyek dua nomor katalog: NGC 21 (Swift) dan NGC 29 (Herschel).


Data Pengamatan (epos J 2000.0)
KonstelasiAndromeda
Asensio rekta 00j 10m 46.9d
Deklinasi +33° 21′ 10″
Pergeseran merah0.015911
Kecepatan radial4770 ± 4 km/s
Jarak234 ± 29 Mtc
(71.7 ± 8.9 Mpc)
TipeSAB(s)bc:
Ukuran tampak (V)1,2′ × 0,59′
Magnitudo (V)+12,8 mag
Nama lain
NGC 21. UGC 100, PGC 767, Z 499.66, MCG +5-1-48, IRAS 00082+3304, GC 14, H 2.853, h 6, NGC 29, KAZ 19, Swift II

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