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NGC 1691

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Galaxie
NGC 1691
(({Kartentext))}
AladinLite
Sternbild Orion
Position
ÄquinoktiumJ2000.0, Epoche: J2000.0
Rektaszension 04h 54m 38,3s[1]
Deklination +03° 16′ 05″[1]
Erscheinungsbild
Morphologischer Typ (R)SB(s)0/a: Sbrst[1]
Helligkeit (visuell) 12,2 mag[2]
Helligkeit (B-Band) 13,1 mag[2]
Winkel­ausdehnung 2,3′ × 1,8′[2]
Positionswinkel 37°[2]
Inklination °
Flächen­helligkeit 13,6 mag/arcmin²[2]
Physikalische Daten
Zugehörigkeit LGG 120
LDCE 358[1][3]
Rotverschiebung 0.015281 ± 0.000033[1]
Radial­geschwin­digkeit (4581 ± 10) km/s[1]
Hubbledistanz
H0 = 73 km/(s • Mpc)
(202 ± 14) · 106 Lj
(61,8 ± 4,3) Mpc [1]
Absolute Helligkeit mag
Masse M
Durchmesser 135.000 Lj[4]
Metallizität [Fe/H]
Geschichte
Entdeckung Edouard Stephan
Entdeckungsdatum 15. Dezember 1876
Katalogbezeichnungen
NGC 1691 • UGC 3201 • PGC 16300 • CGCG 420-019 • MCG +01-13-009 • IRAS 04520+0311 • 2MASX J04543832+0316045 • Mrk 1088 •

NGC 1691 ist eine linsenförmige Galaxie vom Hubble-Typ SB0-a im Sternbild Orion. Sie ist schätzungsweise 202 Millionen Lichtjahre von der Milchstraße entfernt.

Das Objekt wurde am 15. Dezember 1876 von Edouard Stephan entdeckt.[5]

Einzelnachweise

[Bearbeiten | Quelltext bearbeiten]
  1. a b c d e NASA/IPAC EXTRAGALACTIC DATABASE
  2. a b c d e SEDS: NGC 1691
  3. VizieR
  4. NASA/IPAC
  5. Seligman
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NGC 1691
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