NGC 23

Galaxie
NGC 23
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SDSS-Aufnahme
AladinLite
SternbildPegasus
Position
ÄquinoktiumJ2000.0, Epoche: J2000.0
Rektaszension00h 09m 53,41s[1]
Deklination+25° 55′ 25,6″[1]
Erscheinungsbild
Morphologischer TypSB(s)ab / HII / LIRG / Sbrst[1]
Helligkeit (visuell)11,9 mag[2]
Helligkeit (B-Band)12,8 mag[2]
Winkel­ausdehnung2,1′ × 1,3′[2]
Positionswinkel174,2°[2]
Flächen­helligkeit12,8 mag/arcmin²[2]
Physikalische Daten
ZugehörigkeitNGC 23-Gruppe
LGG 2[1][3]
Rotverschiebung0.015227 ± 0.000007[1]
Radial­geschwin­digkeit(4565 ± 2) km/s[1]
Hubbledistanz
H0 = 73 km/(s • Mpc)
(211 ± 15) · 106 Lj
(64,8 ± 4,5) Mpc [1]
Durchmesser130.000 Lj[4]
Geschichte
EntdeckungWilhelm Herschel
Entdeckungsdatum10. September 1784
Katalogbezeichnungen
NGC 23 • UGC 89 • PGC 698 • CGCG 477-62 • CGCG 478-34 • MCG +04-01-033 • IRAS 00073+2538 • KUG 0007+256 • 2MASX J00095341+2555254 • Mrk 545 • GC 9 • H III 147 • GALEXASC J000953.40+255524.9 • NVSS J000953+255526 • WISEA J000953.41+255526.0

NGC 23 ist eine aktive Balken-Spiralgalaxie mit hoher Sternentstehungsrate vom Hubble-Typ SBa im Sternbild Pegasus am Nordsternhimmel. Sie ist schätzungsweise 211 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 130.000 Lichtjahren. Wahrscheinlich bildet sie gemeinsam mit NGC 26 ein gebundenes Galaxienpaar. Sie ist Mitglied der Galaxiengruppe LGG 2 oder NGC 23-Gruppe.

Aufnahmen

Die Supernova SN 1955C wurde hier entdeckt.[5]

Das Objekt wurde am 10. September 1784 vom deutsch-britischen Astronomen Wilhelm Herschel entdeckt.[6]

NGC 23-Gruppe

GalaxieAlternativnameEntfernung/Mio. Lj
NGC 1PGC 564211
NGC 23PGC 698212
NGC 26PGC 732213
PGC 912UGC 127217
PGC 619UGC 69215
PGC 654UGC 79201
PGC 830UGC 110209

Weblinks

Commons: NGC 23 – Sammlung von Bildern, Videos und Audiodateien

Einzelnachweise

  1. a b c d e NASA/IPAC EXTRAGALACTIC DATABASE
  2. a b c d e SEDS: NGC 23
  3. VizieR: LGG 2
  4. NASA/IPAC
  5. Simbad
  6. Seligman

Auf dieser Seite verwendete Medien

NGC23-hst-110-160-190.jpg
Autor/Urheber: Fabian RRRR, Lizenz: CC BY-SA 3.0
RGB composite of Hubble images made at wavelengths 1100nm, 1600nm and 1900nm. The composite is logarithmic scales and done by Aladin-software (2000A&AS..143...33B.)

The Observation is don for http://archive.stsci.edu/proposal_search.php?mission=hst&id=10169

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Based on observations made with the NASA/ESA Hubble Space Telescope, and obtained from the Hubble Legacy Archive, which is a collaboration between the Space Telescope Science Institute (STScI/NASA), the Space Telescope European Coordinating Facility (ST-ECF/ESA) and the Canadian Astronomy Data Centre (CADC/NRC/CSA).

In addition, publications of research supported by an ST ScI grant must carry the following acknowledgment:

Support for Program number ____________ was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASAcontract NAS5-26555.
NGC23 - SDSS DR14.jpg
Autor/Urheber: Sloan Digital Sky Survey, Lizenz: CC BY 4.0
Color mapping
The sky image is obtained by Sloan Digital Sky Survey, DR14 with SciServer.

Angle of view: 4' × 4' (0.3" per pixel), north is up.

Details on the image processing pipeline: https://www.sdss.org/dr14/imaging/jpg-images-on-skyserver/