NGC 2944

Galaxie
NGC 2944
{{{Kartentext}}}
NGC 2944 mit LEDA 1990710 (l.u) & LEDA 27534, SDSS-Aufnahme
AladinLite
Sternbild Löwe
Position
Äquinoktium: J2000.0, Epoche: J2000.0
Rektaszension 09h 39m 18,2s [1]
Deklination +32° 18′ 30″ [1]
Erscheinungsbild
Morphologischer Typ SB(s)c[1]
Helligkeit (visuell) 14,1 mag[2]
Helligkeit (B-Band) 14,8 mag[2]
Winkel­ausdehnung 1′ × 0,4′[2]
Positionswinkel 95°[2]
Inklination °
Flächen­helligkeit 13 mag/arcmin²[2]
Physikalische Daten
Zugehörigkeit [1]
Rotverschiebung 0,022676 ± 0,000027[1]
Radial­geschwin­digkeit (6798 ± 8) km/s[1]
Hubbledistanz
H0 = 73 km/(s • Mpc) 		(302 ± 21) · 106 Lj
(92,6 ± 6,5) Mpc [1]
Absolute Helligkeit mag
Masse M☉
Durchmesser 90.000 Lj[3]
Metallizität [Fe/H] {{{Metallizität}}}
Geschichte
Entdeckung Johann Palisa
Entdeckungsdatum 27. März 1886
Katalogbezeichnungen
NGC 2944 • UGC 5144 • PGC 27533/4 • CGCG 181-078 • MCG +06-21-067 • IRAS 09363+3232 • Arp 63 • VV 82 • USGC U245 NED04

NGC 2944 = Arp 63 ist ein interagierendes Galaxientrio im Sternbild Löwe auf der Ekliptik. Die Hauptgalaxie ist schätzungsweise 302 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 90.000 Lichtjahren. Sie interagiert am Ende ihrer Spiralarme mit den kleineren Objekten PGC 1990710 und PGC 27534 (Arp 63).

Halton Arp gliederte seinen Katalog ungewöhnlicher Galaxien nach rein morphologischen Kriterien in Gruppen. Diese Galaxie gehört zu der Klasse Spiralgalaxien mit einem kleinen Begleiter hoher Flächenhelligkeit auf einem Arm (Arp-Katalog).

Im selben Himmelsareal befinden sich u. a. die Galaxien NGC 2926 und NGC 2964.

Das Objekt wurde am 27. März 1886 von dem österreichischen Astronomen Johann Palisa entdeckt.[4]

Commons: NGC 2944 – Sammlung von Bildern, Videos und Audiodateien

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

Einzelnachweise

  1. ↑ a b c d e NASA/IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c d e SEDS: NGC 2944
  3. ↑ NASA/IPAC
  4. ↑ Seligman

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