NGC 6817

Galaxie
NGC 6817
{{{Kartentext}}}
SDSS-Aufnahme
AladinLite
Sternbild Drache
Position
Äquinoktium: J2000.0, Epoche: J2000.0
Rektaszension 19h 37m 22,4s [1]
Deklination +62° 22′ 59″ [1]
Erscheinungsbild
Morphologischer Typ Sbc + C[2]
Helligkeit (visuell) 15,0/15,3 mag[2]
Helligkeit (B-Band) 15,8/16,3 mag[2]
Winkel­ausdehnung 0,7' × 0,6'
0,2' × 0,2'[2]
Positionswinkel 86°[2]
Inklination °
Flächen­helligkeit 13,9/11,7 mag/arcmin²[2]
Physikalische Daten
Zugehörigkeit [1]
Rotverschiebung 0,040451 ± 0,000113[1]
Radial­geschwin­digkeit (12127 ± 34) km/s[1]
Hubbledistanz
H0 = 73 km/(s • Mpc) 		(552 ± 38) · 106 Lj
(169,1 ± 11,8) Mpc [1]
Absolute Helligkeit mag
Masse M☉
Durchmesser Lj
Metallizität [Fe/H]
Geschichte
Entdeckung Lewis Swift
Entdeckungsdatum 10. September 1885
Katalogbezeichnungen
NGC 6817 • PGC 63431 • CGCG 303-004 • MCG +10-28-005 •

NGC 6817 ist ein interagierendes Galaxienpaar im Sternbild Drache am Nordsternhimmel.

Das Objekt wurde am 10. September 1885 von dem Astronomen Lewis Swift entdeckt und später von Johan Dreyer in seinen New General Catalogue aufgenommen.[3]

Einzelnachweise

  1. ↑ a b c d NASA/IPAC EXTRAGALACTIC DATABASE NGC 6825
  2. ↑ a b c d e f SEDS: NGC 6817
  3. ↑ Seligman

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