NGC 5235

NGC 5235
Image illustrative de l’article NGC 5235
La galaxie spirale barrée NGC 5235.
Données d’observation
(Époque J2000.0)
Constellation Vierge
Ascension droite (α) 13h 36m 01,4s[1]
Déclinaison (δ) 06° 35′ 07″ [1]
Magnitude apparente (V) 14,2 [2]
15,0 dans la Bande B [2]
Brillance de surface 13,65 mag/am2[2]
Dimensions apparentes (V) 1,2′ × 0,5′ [2]
Décalage vers le rouge 0,021949 ± 0,000033 [1]
Angle de position 120°[2]

Localisation dans la constellation : Vierge

(Voir situation dans la constellation : Vierge)
Astrométrie
Vitesse radiale 6 580 ± 10 km/s [1]
Distance 101,34 ± 7,10 Mpc (∼331 millions d'al)[1]
Caractéristiques physiques
Type d'objet Galaxie spirale barrée
Type de galaxie SB[1] SBb[3] SBbc[2] SBbc?[4]
Dimensions environ 33,45 kpc (∼109 000 al)[1]
Découverte
Découvreur(s) William Herschel [4]
Date [4]
Désignation(s) PGC 47984
UGC 8582
MCG 1-35-12
CGCG 45-36
IRAS 13335+0650 [2]
Liste des galaxies spirales barrées
modifier 

NGC 5235 est une galaxie spirale barrée située dans la constellation de la Vierge. Sa vitesse par rapport au fond diffus cosmologique est de 6 871 ± 23 km/s, ce qui correspond à une distance de Hubble de 101,3 ± 7,1 Mpc (∼330 millions d'al)[1]. NGC 5235 a été découverte par l'astronome germano-britannique William Herschel en 1784.

À ce jour, six mesures non basées sur le décalage vers le rouge (redshift) donnent une distance de 93,867 ± 5,376 Mpc (∼306 millions d'al)[5], ce qui est à l'intérieur des valeurs de la distance de Hubble. Notons cependant que c'est avec la valeur moyenne des mesures indépendantes, lorsqu'elles existent, que la base de données NASA/IPAC calcule le diamètre d'une galaxie et qu'en conséquence le diamètre de NGC 5235 pourrait être d'environ 36,1 kpc (∼118 000 al) si on utilisait la distance de Hubble pour le calculer.

Notes et références

  1. ↑ a b c d e f g et h (en) « Results for object NGC 5235 », 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 5200 à 5299 », sur astrovalleyfield.com (consulté le )
  3. ↑ (en) « NGC 5235 sur HyperLeda » (consulté le )
  4. ↑ a b et c (en) Courtney Seligman, « Celestial Atlas Table of Contents, NGC 5235 » (consulté le ).
  5. ↑ « Your NED Search Results », sur ned.ipac.caltech.edu (consulté le )

Voir aussi

Articles connexes

Liens externes

    •  NGC 5227  •  NGC 5228  •  NGC 5229  •  NGC 5230  •  NGC 5231  •  NGC 5232  •  NGC 5233  •  NGC 5234  •  NGC 5235  •  NGC 5236  •  NGC 5237  •  NGC 5238  •  NGC 5239  •  NGC 5240  •  NGC 5241  •  NGC 5242  •  NGC 5243      

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