Antlia-Zwerggalaxie

Galaxie
Antlia-Zwerggalaxie
{{{Kartentext}}}
AladinLite
Sternbild Luftpumpe
Position
Äquinoktium: J2000.0, Epoche: J2000.0
Rektaszension 10h 04m 03,9s [1]
Deklination −27° 20′ 01″ [1]
Erscheinungsbild
Morphologischer Typ dE3
Helligkeit (visuell) 14,8 mag
Helligkeit (B-Band) (−10,7 ± 0,3) mag
Winkel­ausdehnung 2′ × 1,5′
Positionswinkel
Inklination °
Flächen­helligkeit  mag/arcmin²
Physikalische Daten
Zugehörigkeit Lokale Gruppe
Rotverschiebung +0,001208[2]
Radial­geschwin­digkeit +362 km/s[2]
Hubbledistanz
H0 = 73 km/(s • Mpc)
Entfernung 4,6 Mio. Lj  
Absolute Helligkeit mag
Masse M☉
Durchmesser 5500 Lj
Metallizität [Fe/H] {{{Metallizität}}}
Geschichte
Entdeckung Harold G. Corwin
Gérard H. de Vaucouleurs
Antoinette de Vaucouleurs
Entdeckungsdatum 1985
Katalogbezeichnungen
PGC 29194 • SGC 1001.9-2705 • AM 1001-270

Die Antlia-Zwerggalaxie (Katalogbezeichnung PGC 29194) ist eine elliptische Zwerggalaxie (Typ dE3) im Sternbild Luftpumpe. Die nur 5500 Lichtjahre im Durchmesser messende Galaxie hat eine Winkelausdehnung von 2,0 × 1,5 Bogenminuten und ist mit einer Entfernung von etwa 4,6 Millionen Lichtjahren eines der am weitesten entfernten Mitglieder der Lokalen Gruppe. Mit einer Helligkeit von nur 14,8 mag ist diese Galaxie nicht mit kleineren Teleskopen sichtbar.
Die Antlia-Zwerggalaxie wurde 1985 durch Harold G. Corwin, Gérard H. de Vaucouleurs und Antoinette de Vaucouleurs entdeckt. Erst 1997 wurde jedoch in einem Bericht ihre mögliche Zugehörigkeit zur lokalen Gruppe veröffentlicht.

Einzelnachweise

  1. ↑ NAME ANTLIA DWARF GALAXY -- Galaxy. In: SIMBAD. Centre de Données astronomiques de Strasbourg, abgerufen am 11. September 2011 (englisch).
  2. ↑ NASA/IPAC Extragalactic Database

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