NGC 7773

Galaxie
NGC 7773
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Aufnahme mithilfe des Weltraum-Hubble-Teleskops
AladinLite
SternbildPegasus
Position
Äquinoktium: J2000.0, Epoche: J2000.0
Rektaszension23h 52m 09,89s[1]
Deklination+31° 16′ 35,8″[1]
Erscheinungsbild
Morphologischer TypSBbc[1]
Helligkeit (visuell)13,5 mag[2]
Helligkeit (B-Band)14,3 mag[2]
Winkel­ausdehnung1,2' × 1,2'[2]
Flächen­helligkeit13,7 mag/arcmin²[2]
Physikalische Daten
Rotverschiebung0.028306 ± 0.000033[1]
Radial­geschwin­digkeit(8486 ± 10) km/s[1]
Hubbledistanz
H0 = 73 km/(s • Mpc)		(387 ± 27) · 106 Lj
(118,8 ± 8,3) Mpc [1]
Geschichte
EntdeckungWilliam Herschel
Entdeckungsdatum9. Oktober 1790
Katalogbezeichnungen
NGC 7773 • UGC 12820 • PGC 72681 • CGCG 498-022 • MCG +05-56-015 • IRAS 23496+3059 • 2MASX J23520987+3116356 • GC 5024 • H II 851 • h 2277 • NVSS J235209+311634 • WISEA J235209.87+311635.7

NGC 7773 ist eine Balken-Spiralgalaxie vom Hubble-Typ SBbc im Sternbild Pegasus am Nordsternhimmel. Sie ist schätzungsweise 387 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 135.000 Lichtjahren.
Im selben Himmelsareal befindet sich die Galaxie NGC 7760.

Das Objekt wurde am 9. Oktober 1790 von Wilhelm Herschel entdeckt.[3]

Weblinks

Commons: NGC 7773 – Sammlung von Bildern, Videos und Audiodateien

Einzelnachweise

  1. ↑ a b c d NASA/IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c d SEDS: NGC 7773
  3. ↑ Seligman

Auf dieser Seite verwendete Medien

Galactic maturity (48017655538).jpg
Autor/Urheber: European Space Agency, Lizenz: CC BY 2.0

This striking image was taken by the NASA/ESA Hubble Space Telescope’s Wide Field Camera 3, a powerful instrument installed on the telescope in 2009. WFC3 is responsible for many of Hubble’s most breathtaking and iconic photographs, including Pictures of the Week.

Shown here, NGC 7773 is a beautiful example of a barred spiral galaxy. A luminous bar-shaped structure cuts prominently through the galaxy's bright core, extending to the inner boundary of NGC 7773's sweeping, pinwheel-like spiral arms. Astronomers think that these bar structures emerge later in the lifetime of a galaxy, as star-forming material makes its way towards the galactic centre — younger spirals do not feature barred structures as often as older spirals do, suggesting that bars are a sign of galactic maturity. They are also thought to act as stellar nurseries, as they gleam brightly with copious numbers of youthful stars.

Our galaxy, the Milky Way, is thought to be a barred spiral like NGC 7773. By studying galactic specimens such as NGC 7773 throughout the Universe, researchers hope to learn more about the processes that have shaped — and continue to shape — our cosmic home.

Credits: ESA/Hubble & NASA, J. Walsh; <a href="https://creativecommons.org/licenses/by/4.0/" rel="noreferrer nofollow">CC BY 4.0</a>