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NGC 4155

NGC 4155
Image illustrative de l’article NGC 4155
La galaxie elliptique NGC 4155
Données d’observation
(Époque J2000.0)
Constellation Chevelure de Bérénice
Ascension droite (α) 12h 10m 45,7s[1]
Déclinaison (δ) 19° 02′ 27″ [1]
Magnitude apparente (V) 13,3[2]
14,3 dans la Bande B[2]
Brillance de surface 13,40 mag/am2[2]
Dimensions apparentes (V) 1,1 × 1,0[2]
Décalage vers le rouge 0,024894 ± 0,000007[1]
Angle de position 81°[2]

Localisation dans la constellation : Chevelure de Bérénice

(Voir situation dans la constellation : Chevelure de Bérénice)
Astrométrie
Vitesse radiale 7 463 ± 2 km/s [1]
Distance 114,82 ± 8,04 Mpc (∼374 millions d'al)[1]
Caractéristiques physiques
Type d'objet Galaxie elliptique
Type de galaxie E[1],[3] E1[2],[4]
Dimensions environ 49,87 kpc (∼163 000 al)[1],[a]
Découverte
Découvreur(s) Lewis Swift[4]
Date [4]
Désignation(s) PGC 38761
UGC 7172
MCG 3-31-58
CGCG 98-82[2]
Liste des galaxies elliptiques

NGC 4155 est une vaste galaxie elliptique située dans la constellation de la Chevelure de Bérénice. Sa vitesse par rapport au fond diffus cosmologique est de 7 785 ± 23 km/s, ce qui correspond à une distance de Hubble de 114,8 ± 8,0 Mpc (∼374 millions d'al)[1]. NGC 4155 a été découverte par l'astronome américain Lewis Swift en 1885.

Selon la base de données Simbad, NGC 4155 est une radiogalaxie[5].

À ce jour, une mesure non basée sur le décalage vers le rouge (redshift) donne une distance d'environ 114,000 Mpc (∼372 millions d'al)[6]. Cette valeur est loin à l'extérieur des valeurs de la distance de Hubble.

Notes et références

Notes

Références

  1. a b c d e f g et h (en) « Results for object NGC 4155 », 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 4100 à 4199 », sur astrovalleyfield.ca (consulté le )
  3. (en) « NGC 4155 sur HyperLeda » (consulté le )
  4. a b et c (en) Courtney Seligman, « Celestial Atlas Table of Contents, NGC 4155 » (consulté le ).
  5. (en) « Simbad, NGC 4155 -- Radio Galaxy » (consulté le )
  6. « Your NED Search Results. Distance Results for NGC 4155 », sur ned.ipac.caltech.edu (consulté le )

Voir aussi

Articles connexes

Liens externes

    •  NGC 4147  •  NGC 4148  •  NGC 4149  •  NGC 4150  •  NGC 4151  •  NGC 4152  •  NGC 4153  •  NGC 4154  •  NGC 4155  •  NGC 4156  •  NGC 4157  •  NGC 4158  •  NGC 4159  •  NGC 4160  •  NGC 4161  •  NGC 4162  •  NGC 4163      
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