NGC 5476

NGC 5476
Image illustrative de l’article NGC 5476
La galaxie spirale NGC 5476.
Données d’observation
(Époque J2000.0)
Constellation Vierge
Ascension droite (α) 14h 08m 08,5s[1]
Déclinaison (δ) −06° 05′ 31″ [1]
Magnitude apparente (V) 12,8[2]
13,4 dans la Bande B [2]
Brillance de surface 13,44 mag/am2[2]
Dimensions apparentes (V) 1,5′ × 1,2′[2]
Décalage vers le rouge 0,008869 ± 0,000017[1]
Angle de position 135°[2]

Localisation dans la constellation : Vierge

(Voir situation dans la constellation : Vierge)
Astrométrie
Vitesse radiale 2 659 ± 5 km/s [1]
Distance 43,17 ± 3,04 Mpc (∼141 millions d'al)[1]
Caractéristiques physiques
Type d'objet Galaxie spirale
Type de galaxie SAB(rs)dm?[1] SABd[3] Sd[2] Sd?[4]
Dimensions environ 19,04 kpc (∼62 100 al)[1]
Découverte
Découvreur(s) William Herschel[4]
Date [4]
Désignation(s) PGC 50429
MCG -1-36-9
IRAS 14055-0551[2]
Liste des galaxies spirales
modifier 

NGC 5476 est une galaxie spirale située dans la constellation de la Vierge. Sa vitesse par rapport au fond diffus cosmologique est de 2 927 ± 19 km/s, ce qui correspond à une distance de Hubble de 43,2 ± 3,0 Mpc (∼141 millions d'al)[1]. NGC 5476 a été découverte par l'astronome germano-britannique William Herschel en 1785.

On voit à peine le début d'une barre sur l'image obtenue des données du relevé Pan-STARRS, aussi la classification de spirale intermédiaire par les bases de données NASA/IPAC et HyperLeda ne semble pas convenir à cette galaxie. Quant à la classification de type magellanique, elle est erronée, car on voit nettement la présence de plus d'un bras spiral sur l'image.

La classe de luminosité de NGC 5476 est IV-V et elle présente une large raie HI[1].

Notes et références

  1. ↑ a b c d e f g h et i (en) « Results for object NGC 5476 », NASA/IPAC Extragalactic Database (consulté le )
  2. ↑ a b c d e f et g « Les données de «Revised NGC and IC Catalog by Wolfgang Steinicke», NGC 5400 à 5499 », sur astrovalleyfield.com (consulté le )
  3. ↑ (en) « NGC 5476 sur HyperLeda » (consulté le )
  4. ↑ a b et c (en) Courtney Seligman, « titre=Celestial Atlas Table of Contents, NGC 5476 » (consulté le )

Voir aussi

Articles connexes

Liens externes

    •  NGC 5468  •  NGC 5469  •  NGC 5470  •  NGC 5471  •  NGC 5472  •  NGC 5473  •  NGC 5474  •  NGC 5475  •  NGC 5476  •  NGC 5477  •  NGC 5478  •  NGC 5479  •  NGC 5480  •  NGC 5481  •  NGC 5482  •  NGC 5483  •  NGC 5484      

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