NGC 4423

Galaxie
NGC 4423
{{{Kartentext}}}
Aufnahme des Hubble-Weltraumteleskops
AladinLite
Sternbild Jungfrau
Position
Äquinoktium: J2000.0, Epoche: J2000.0
Rektaszension 12h 27m 09,0s [1]
Deklination +05° 52′ 49″ [1]
Erscheinungsbild
Morphologischer Typ Sdm: / HII[1]
Helligkeit (visuell) 13,7 mag[2]
Helligkeit (B-Band) 14,3 mag[2]
Winkel­ausdehnung 2,3′ × 0,4′[2]
Positionswinkel 18°[2]
Inklination °
Flächen­helligkeit 13,5 mag/arcmin²[2]
Physikalische Daten
Zugehörigkeit Virgo-Cluster, LGG 292[1][3]
Rotverschiebung 0,003727 ± 0,000020[1]
Radial­geschwin­digkeit (1117 ± 6) km/s[1]
Hubbledistanz
H0 = 73 km/(s • Mpc) 		(47 ± 3) · 106 Lj
(14,3 ± 1,0) Mpc [1]
Absolute Helligkeit mag
Masse M☉
Durchmesser 35.000 Lj
Metallizität [Fe/H] {{{Metallizität}}}
Geschichte
Entdeckung Wilhelm Herschel
Entdeckungsdatum 13. April 1784
Katalogbezeichnungen
NGC 4423 • UGC 7556 • PGC 40801 • CGCG 042-107 • MCG +01-32-65 • IRAS 12246+0609 • 2MASX J12270897+0552488 • VCC 971 • GC 2982 • H II 145 • h 1266 •

NGC 4423 ist eine Spiralgalaxie mit ausgedehnten Sternentstehungsgebieten vom Hubble-Typ Sd[2] im Sternbild Jungfrau auf der Ekliptik. Sie ist schätzungsweise 47 Millionen Lichtjahre von der Milchstraße entfernt, hat einen Durchmesser von etwa 35.000 Lichtjahren und wird unter der Katalognummer VCC 971 als Mitglied des Virgo-Galaxienhaufens gelistet.
Im selben Himmelsareal befinden sich u. a. die Galaxien NGC 4430, NGC 4432, NGC 4453 und NGC 4376.

Das Objekt wurde am 13. April 1784 von Wilhelm Herschel entdeckt.[4]

Einzelnachweise

  1. ↑ a b c d e NASA/IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c d e f SEDS: NGC 4423
  3. ↑ VizieR
  4. ↑ Seligman

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