NGC 7232

Galaxie
NGC 7232
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Die Galaxien NGC 7232 und NGC 7233 aufgenommen mithilfe des Gemini-Teleskops
AladinLite
SternbildKranich
Position
Äquinoktium: J2000.0, Epoche: J2000.0
Rektaszension22h 15m 38,0s[1]
Deklination-45° 51′ 00″[1]
Erscheinungsbild
Morphologischer TypSB(rs)a: / LLAGN[1]
Helligkeit (visuell)12,0 mag[2]
Helligkeit (B-Band)12,9 mag[2]
Winkel­ausdehnung2.60 × 1.0[2]
Positionswinkel99°[2]
Flächen­helligkeit12,9 mag/arcmin²[2]
Physikalische Daten
ZugehörigkeitLGG 455[1][3]
Rotverschiebung0.006388 ± 0.000018[1]
Radial­geschwin­digkeit(1915 ± 5) km/s[1]
Hubbledistanz
vrad / H0		(84 ± 6) · 106 Lj
(25,9 ± 1,8) Mpc [1]
Geschichte
EntdeckungJohn Herschel
Entdeckungsdatum6. September 1834
Katalogbezeichnungen
NGC 7232 • PGC 68431 • ESO 289-IG007 • 2MASX J22153798-4551000 • LDCE 1508 NED005

NGC 7232 ist eine Balken-Spiralgalaxie vom Hubble-Typ SBa[2] im Sternbild Kranich am Südsternhimmel. Sie ist schätzungsweise 84 Millionen Lichtjahre von der Milchstraße entfernt.

Das Objekt wurde am 6. September 1834 von John Herschel entdeckt.[4]

NGC 7232-Gruppe (LGG 455)

GalaxieAlternativnameEntfernung/Mio. Lj
NGC 7233PGC 6844181
IC 5181PGC 6831788
NGC 7232PGC 6843184
PGC 68443NGC 7232B102

Weblinks

Einzelnachweise

  1. ↑ a b c d e NASA/IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c d e f SEDS: NGC 7232
  3. ↑ VizieR
  4. ↑ Seligman

Auf dieser Seite verwendete Medien

NGC7232, NGC7233 - Gemini-ngc7232-final.jpg
Autor/Urheber: Credit: International Gemini Observatory/NOIRLab/NSF/AURA/T. A. Rector (University of Alaska Anchorage), Lizenz: CC BY 4.0
NGC 7232/3

This image shows an interacting trio of galaxies known as the Lyon Group of Galaxies #455 (LGG 455). It is made up of the galaxies NGC 7232 (upper right), NGC 7233 (lower right), and NGC 7232B (left). The two brightest objects near the center of the image are foreground stars in our Milky Way. Dark lanes of dusty material can be seen in NGC 7232 and NGC 7233, while NGC 7232B shows bright spots of young, blue stars along its weak spiral arms. LGG 455 has not been studied in great detail, but it is thought to host a 'dark galaxy', a rare object that contains the raw ingredients for making stars but which hasn't been able to form any. Even though the dark galaxy in LGG 455 contains enough gas to make more than 400 million Suns, the deep image by Gemini is not able to find any significant population of stars (just to the left of the lower foreground star in this image). Most likely, that huge amount of gas was flung out of NGC 7233 when it had a close encounter with one of its two companions.

Credit:

International Gemini Observatory/NOIRLab/NSF/AURA/T. A. Rector (University of Alaska Anchorage)