NGC 7

NGC 7
NGC 7
Gambar Pan-STARRS dari NGC 7
Data pengamatan (J2000 epos)
Rasi bintangSculptor
Asensio rekta 00j 08m 20.3d[1]
Deklinasi -29° 55′ 01″[1]
Pergeseran merah0,004987[2]
Kecepatan radial helio1495 ± 2 km/s[2]
Jarak71,4 ± 5,2 jtc
(21,9 ± 1,6 Mpc)[3]
Magnitudo semu (V)13,5[2]
Magnitudo mutlak (V)−17,83[4]
Ciri-ciri
JenisSBc[5]
Ukuran semu (V)2,2′ × 0,5′[2]
Penamaan lain
MCG-05-01-037, ESO 409-G022, AM 0005-301, PGC 627, h 4014, GC 2[6]

NGC 7 adalah galaksi spiral berbatang yang terletak di rasi bintang Sculptor. NGC 7 ditemukan oleh astronom Inggris, John Frederick William Herschel pada tanggal 27 September 1834, yang menggunakan teleskop reflektor dengan ukuran 18,7 inci pada saat itu.[6] Astronom Steve Gottlieb menjelaskan galaksi ini dengan galaksi redup, walaupun besar, dan tampak sisi pada perspektif dari Galaksi Bima Sakti. Ia juga mencatat bagaimana galaksi ini hanya dapat diamati jelas dengan penglihatan periferal, tidak dengan melihat langsung galaksi tersebut.[6]

Referensi

  1. ^ a b "NGC 7". SIMBAD. Centre de données astronomiques de Strasbourg. Diakses tanggal 2 Februari 2021. 
  2. ^ a b c d "NASA/IPAC Extragalactic Database". Results for NGC 0007. Diakses tanggal 3 Mei 2010. 
  3. ^ "Distance Results for NGC 0007". NASA/IPAC Extragalactic Database. Diakses tanggal 3 Mei 2010. 
  4. ^ "The galaxy NGC 7". 
  5. ^ "Search specification: NGC 7". HyperLeda. Université Claude Bernard Lyon 1. Diakses tanggal 2 Februari 2021. 
  6. ^ a b c "DSS Images for NGC 000 thru NGC 099". NGC/IC Project. Association of Universities for Research in Astronomy, Inc. Diarsipkan dari versi asli tanggal 26 September 2007. Diakses tanggal 25 November 2008. 

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