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NGC 3407

NGC 3407
Image illustrative de l’article NGC 3407
La galaxie lenticulaire NGC 3407
Données d’observation
(Époque J2000.0)
Constellation Grande Ourse
Ascension droite (α) 10h 52m 17,8s[1]
Déclinaison (δ) 61° 22′ 47″ [1]
Magnitude apparente (V) 13,6 [2]
14,6 dans la Bande B[2]
Brillance de surface 13,58 mag/am2[2]
Dimensions apparentes (V) 1,4′ × 0,7′[2]
Décalage vers le rouge 0,016751 ± 0,000008[1]
Angle de position 15°[2]

Localisation dans la constellation : Grande Ourse

(Voir situation dans la constellation : Grande Ourse)
Astrométrie
Vitesse radiale 5 022 ± 2 km/s [1]
Distance 70,3 ± 5,6 Mpc (∼229 millions d'al)[1]
Caractéristiques physiques
Type d'objet Galaxie lenticulaire
Type de galaxie S0^-?[1] E-S0[2]
Dimensions environ 34,33 kpc (∼112 000 al)[1]
Découverte
Découvreur(s) William Herschel[3]
Date [3]
Désignation(s) PGC 32626
UGC 5978
MCG 10-16-17
CGCG 291-7[2]
Liste des galaxies lenticulaires
modifier 

NGC 3407 est une galaxie lenticulaire située dans la constellation de la Grande Ourse. Sa vitesse par rapport au fond diffus cosmologique est de 5 158 ± 10 km/s, ce qui correspond à une distance de Hubble de 76,1 ± 5,3 Mpc (∼248 millions d'al)[1]. NGC 3407 a été découverte par l'astronome germano-britannique William Herschel en 1793.

À ce jour, une mesure non basée sur le décalage vers le rouge (redshift) donne une distance d'environ 83,500 Mpc (∼272 millions d'al)[4]. Cette valeur est tout juste à l'extérieur 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 3407 pourrait être d'environ 31,3 kpc (∼102 000 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 3407 », 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 3400 à 3499 », sur astrovalleyfield.ca (consulté le )
  3. ↑ a et b (en) Courtney Seligman, « Celestial Atlas Table of Contents, NGC 3407 » (consulté le ).
  4. ↑ « Your NED Search Results. Distance Results for NGC 3407 », sur ned.ipac.caltech.edu (consulté le )

Voir aussi

Articles connexes

Liens externes

    •  NGC 3399  •  NGC 3400  •  NGC 3401  •  NGC 3402  •  NGC 3403  •  NGC 3404  •  NGC 3405  •  NGC 3406  •  NGC 3407  •  NGC 3408  •  NGC 3409  •  NGC 3410  •  NGC 3411  •  NGC 3412  •  NGC 3413  •  NGC 3414  •  NGC 3415      

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