NGC 830

NGC 830
Image illustrative de l’article NGC 830
La galaxie lenticulaire NGC 830
Données d’observation
(Époque J2000.0)
Constellation Baleine
Ascension droite (α) 02h 08m 58,7s[1]
Déclinaison (δ) −07° 46′ 01″ [1]
Magnitude apparente (V) 13,3 [2]
14,3 dans la Bande B[2]
Brillance de surface 13,55 mag/am2[2]
Dimensions apparentes (V) 1,4′ × 0,9′
Décalage vers le rouge +0,012863 ± 0,000006[1]
Angle de position 72°[2]

Localisation dans la constellation : Baleine

(Voir situation dans la constellation : Baleine)
Astrométrie
Vitesse radiale 3 856 ± 2 km/s [1]
Distance 53,11 ± 3,73 Mpc (∼173 millions d'al)[1]
Caractéristiques physiques
Type d'objet Galaxie lenticulaire
Type de galaxie SB0^-?[1] E-S0[2] E/S0?[3]
Dimensions environ 18,83 kpc (∼61 400 al)[1]
Découverte
Découvreur(s) Heinrich d'Arrest[3]
Date [3]
Désignation(s) PGC 8201
MK 1020
MCG -1-6-50[2]
Liste des galaxies lenticulaires
modifier 

NGC 830 est une galaxie lenticulaire située dans la constellation de la Baleine. Sa vitesse par rapport au fond diffus cosmologique est de 3 601 ± 18 km/s, ce qui correspond à une distance de Hubble de 53,1 ± 3,7 Mpc (∼173 millions d'al)[1]. NGC 830 a été découverte par l'astronome prussien Heinrich d'Arrest en 1865.

NGC 830 est une galaxie dont le noyau brille dans le domaine de l'ultraviolet. Elle est inscrite dans le catalogue de Markarian sous la cote Mrk 1020 (MK 1020)[2].

À ce jour, une mesure non basée sur le décalage vers le rouge (redshift) donne une distance d'environ 45,800 Mpc (∼149 millions d'al)[4]. Cette valeur est tout juste à l'extérieur des valeurs de la distance de Hubble.

Groupe de NGC 788

La galaxie NGC 830 fait partie du groupe de NGC 788 qui comprend au moins 5 galaxies. Outre NGC 830 et NGC 788, les 3 autres galaxies du groupe sont IC 183, NGC 829 et NGC 842[5].

Notes et références

  1. ↑ a b c d e f g et h (en) « Results for object NGC 830 », 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 800 à 899 », sur astrovalleyfield.com (consulté le )
  3. ↑ a b et c (en) Courtney Seligman, « Celestial Atlas Table of Contents, NGC 830 » (consulté le ).
  4. ↑ « Your NED Search Results. Distance Results for NGC 830 », sur ned.ipac.caltech.edu (consulté le )
  5. ↑ 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 822  •  NGC 823  •  NGC 824  •  NGC 825  •  NGC 826  •  NGC 827  •  NGC 828  •  NGC 829  •  NGC 830  •  NGC 831  •  NGC 832  •  NGC 833  •  NGC 834  •  NGC 835  •  NGC 836  •  NGC 837  •  NGC 838      

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