NGC 1961

Galaxie
NGC 1961
{{{Kartentext}}}
Aufnahme mit einem 60-cm-Teleskop
AladinLite
Sternbild Giraffe
Position
Äquinoktium: J2000.0, Epoche: J2000.0
Rektaszension 05h 42m 04,648s [1]
Deklination +69° 22′ 42,38″ [1]
Erscheinungsbild
Morphologischer Typ SAB(rs)c LINER[1]
Helligkeit (visuell) 10,9 mag[2]
Helligkeit (B-Band) 11,7 mag[2]
Winkel­ausdehnung 4,5′ × 3,1′[2]
Positionswinkel 85°[2]
Inklination °
Flächen­helligkeit 13,6 mag/arcmin²[2]
Physikalische Daten
Zugehörigkeit NGC 1961-Gruppe, LGG 132[1][3]
Rotverschiebung 0,013122 ± 0,000003[1]
Radial­geschwin­digkeit (3934 ± 1) km/s[1]
Hubbledistanz
H0 = 73 km/(s • Mpc) 		(181 ± 13) · 106 Lj
(55,6 ± 3,9) Mpc [1]
Absolute Helligkeit mag
Masse M☉
Durchmesser 235.000 Lj[4]
Metallizität [Fe/H] {{{Metallizität}}}
Geschichte
Entdeckung Wilhelm Herschel
Entdeckungsdatum 3. Dezember 1788
Katalogbezeichnungen
NGC 1961 • IC 2133 • UGC 3334 • PGC 17625 • CGCG 329-008 • MCG +12-06-007 • IRAS 05365+6921 • Arp 184 • GC 1167 • H III 747 •

NGC 1961 = IC 2133 = Arp 184 ist eine Balkenspiralgalaxie vom Hubble-Typ SAB(rs)c im Sternbild Giraffe am Nordsternhimmel. Die Spiralarme sind auf der nördlichen Seite stark verzerrt und die Galaxie weist in weiten Gebieten eine rege Sternentstehung auf. Sie ist schätzungsweise 182 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 235.000 Lichtjahren.

Halton Arp gliederte seinen Katalog ungewöhnlicher Galaxien nach rein morphologischen Kriterien in Gruppen. Diese Galaxie gehört zu der Klasse Galaxien mit schmalen Filamenten.

Das Objekt wurde am 3. Dezember 1788 von dem deutsch-britischen Astronomen Friedrich Wilhelm Herschel entdeckt.[5]

NGC 1961-Gruppe (LGG 132)

Galaxie Alternativname Entfernung/Mio. Lj
PGC 17456 UGC 3319 194
NGC 1961 PGC 17625 182
PGC 17692 UGC 3342 184
PGC 18161 UGC 3379 189
PGC 17645 CGCG 329-10 185
PGC 17757 MCG +12-6-13 200

Literatur

  • Jeff Kanipe und Dennis Webb: The Arp Atlas of Peculiar Galaxies – A Chronicle and Observer´s Guide, Richmond 2006, ISBN 978-0-943396-76-7
  • König, Michael & Binnewies, Stefan (2019): Bildatlas der Galaxien: Die Astrophysik hinter den Astrofotografien, Stuttgart: Kosmos, S. 222
Commons: NGC 1961 – Sammlung von Bildern, Videos und Audiodateien

Einzelnachweise

  1. ↑ a b c d e NASA/IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c d e SEDS: NGC 1961
  3. ↑ VizieR
  4. ↑ NASA/IPAC
  5. ↑ Seligman

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