NGC 7547

Galaxie
NGC 7547
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SDSS-Aufnahme
AladinLite
Sternbild Pegasus
Position
Äquinoktium: J2000.0, Epoche: J2000.0
Rektaszension 23h 15m 03,4s [1]
Deklination +18° 58′ 24″ [1]
Erscheinungsbild
Morphologischer Typ (R')SAB(s)0/a:[1]
Helligkeit (visuell) 13,6 mag[2]
Helligkeit (B-Band) 14,6 mag[2]
Winkel­ausdehnung 1,1' × 0,5'[2]
Positionswinkel 98°[2]
Inklination °
Flächen­helligkeit 12,8 mag/arcmin²[2]
Physikalische Daten
Zugehörigkeit WBL 700[1]
Rotverschiebung 0.015918 ± 0.000033[1]
Radial­geschwin­digkeit (4772 ± 10) km/s[1]
Hubbledistanz
H0 = 73 km/(s • Mpc) 		(221 ± 15) · 106 Lj
(67,8 ± 4,7) Mpc [1]
Absolute Helligkeit mag
Masse M☉
Durchmesser Lj
Metallizität [Fe/H]
Geschichte
Entdeckung John Herschel
Entdeckungsdatum 26. August 1827
Katalogbezeichnungen
NGC 7547 • UGC 12453 • PGC 70819 • CGCG 454-011 • MCG +03-59-013 • 2MASX J23150347+1858245 • HCG 93C • GALEXASC J231503.37+185825.9 • KTG 78A

NGC 7547 ist eine linsenförmige Galaxie vom Hubble-Typ SAB0/a im Sternbild Pegasus knapp nördlich des Himmelsäquators. Sie ist schätzungsweise 221 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 70.000 Lichtjahren. Gemeinsam mit NGC 7549, NGC 7550, NGC 7553 und NGC 7558 bildet sie die Galaxiengruppe HCG 93.

Das Objekt wurde am 26. August 1827 vom britischen Astronomen John Herschel entdeckt.[3]

Literatur

  • König, Michael & Binnewies, Stefan (2019): Bildatlas der Galaxien: Die Astrophysik hinter den Astrofotografien, Stuttgart: Kosmos, S. 206

Einzelnachweise

  1. ↑ a b c d e NASA/IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c d e SEDS: NGC 7547
  3. ↑ Seligman

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