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NGC 3892

NGC 3892
Image illustrative de l’article NGC 3892
La galaxie lenticulaire NGC 3892
Données d’observation
(Époque J2000.0)
Constellation Coupe
Ascension droite (α) 11h 48m 01,0s[1]
Déclinaison (δ) −10° 57′ 43″ [1]
Magnitude apparente (V) 11,5[2]
12,4 dans la Bande B[2]
Brillance de surface 13,63 mag/am2[2]
Dimensions apparentes (V) 3,1′ × 2,3′[2]
Décalage vers le rouge 0,005831 ± 0,000014[1]
Angle de position 95°[2]

Localisation dans la constellation : Coupe

(Voir situation dans la constellation : Coupe)
Astrométrie
Vitesse radiale 1 748 ± 4 km/s [1]
Distance 31,18 ± 2,22 Mpc (∼102 millions d'al)[1]
Caractéristiques physiques
Type d'objet Galaxie lenticulaire
Type de galaxie SB(rs)0+[1] SB0-a[2],[3],[4]
Dimensions environ 23,35 kpc (∼76 200 al)[1]
Découverte
Découvreur(s) William Herschel[3]
Date [3]
Désignation(s) PGC 36827
MCG -2-30-30[2]
Liste des galaxies lenticulaires
modifier 

NGC 3892 est une galaxie lenticulaire située dans la constellation de la Coupe. Sa vitesse par rapport au fond diffus cosmologique est de 2 114 ± 26 km/s, ce qui correspond à une distance de Hubble de 31,2 ± 2,2 Mpc (∼102 millions d'al)[1]. NGC 3892 a été découverte par l'astronome germano-britannique William Herschel en 1786.

NGC 3892 présente une large raie HI[1].

À ce jour, une mesure non basée sur le décalage vers le rouge (redshift) donne une distance d'environ 27,200 Mpc (∼88,7 millions d'al)[5]. 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 3891 pourrait être d'environ 26,8 kpc (∼87 400 al) si on utilisait la distance de Hubble pour le calculer.

Groupe de MCG -2-30-14

La galaxie NGC 3892 fait partie d'un petit groupe d'au moins cinq galaxies, le groupe de MCG -2-30-14. Les trois autres galaxies du groupe sont NGC 3732, NGC 3779 et MCG -2-30-27[6].

Notes et références

  1. ↑ a b c d e f g h et i (en) « Results for object NGC 3892 », 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 3800 à 3899 », sur astrovalleyfield.ca (consulté le )
  3. ↑ a b et c (en) Courtney Seligman, « Celestial Atlas Table of Contents, NGC 3892 » (consulté le ).
  4. ↑ (en) « NGC 3892 sur HyperLeda » (consulté le )
  5. ↑ « Your NED Search Results. Distance Results for NGC 3892 », sur ned.ipac.caltech.edu (consulté le )
  6. ↑ A.M. Garcia, « General study of group membership. II - Determination of nearby groups », Astronomy and Astrophysics Supplement Series, vol. 100 #1,‎ , p. 47-90 (Bibcode 1993A&AS..100...47G)

Voir aussi

Articles connexes

Liens externes

    •  NGC 3884  •  NGC 3885  •  NGC 3886  •  NGC 3887  •  NGC 3888  •  NGC 3889  •  NGC 3890  •  NGC 3891  •  NGC 3892  •  NGC 3893  •  NGC 3894  •  NGC 3895  •  NGC 3896  •  NGC 3897  •  NGC 3898  •  NGC 3899  •  NGC 3900      

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