NGC 3140

NGC 3140
Image illustrative de l’article NGC 3140
La galaxie spirale NGC 3140.
Données d’observation
(Époque J2000.0)
Constellation Hydre
Ascension droite (α) 10h 09m 27,8s[1]
Déclinaison (δ) −16° 37′ 41″ [1]
Magnitude apparente (V) 14,0 [2]
14,8 dans la Bande B[2]
Brillance de surface 13,64 mag/am2[2]
Dimensions apparentes (V) 0,9′ × 0,8′[2]
Décalage vers le rouge 0,028223 ± 0,000047[1]
Angle de position 41°[2]

Localisation dans la constellation : Hydre

(Voir situation dans la constellation : Hydre)
Astrométrie
Vitesse radiale 8 461 ± 14 km/s [1]
Distance 130,00 ± 9,11 Mpc (∼424 millions d'al)[1]
Caractéristiques physiques
Type d'objet Galaxie spirale
Type de galaxie Sc[1],[2],[3] SB(rs)bc?[4]
Dimensions environ 32,29 kpc (∼105 000 al)[1]
Découverte
Découvreur(s) Francis Leavenworth[4]
Date [4]
Désignation(s) PGC 29548
MCG -3-26-28[2]
Liste des galaxies spirales
modifier 

NGC 3140 est une galaxie spirale relativement éloignée et située dans la constellation de l'Hydre. Sa vitesse par rapport au fond diffus cosmologique est de 8 814 ± 28 km/s, ce qui correspond à une distance de Hubble de 130,0 ± 9,1 Mpc (∼424 millions d'al)[1]. NGC 3140 a été découverte par l'astronome américain Francis Leavenworth en 1886[4].

La classe de luminosité de NGC 3140 est III[1].

À ce jour, une mesure non basée sur le décalage vers le rouge (redshift) donne une distance d'environ 111,000 Mpc (∼362 millions d'al)[5]. Cette valeur est à l'extérieur mais compatible avec les 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 3140 pourrait être d'environ 37,8 kpc (∼123 000 al) si on utilisait la distance de Hubble pour le calculer.

Notes et références

  1. ↑ a b c d e f g h et i (en) « Results for object NGC 3140 », 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 3100 à 3199 », sur astrovalleyfield.com (consulté le )
  3. ↑ (en) « NGC 3140 sur HyperLeda » (consulté le )
  4. ↑ a b c et d (en) Courtney Seligman, « Celestial Atlas Table of Contents, NGC 3140 » (consulté le ).
  5. ↑ « Your NED Search Results. Distance Results for NGC 3140 », sur ned.ipac.caltech.edu (consulté le )

Voir aussi

Articles connexes

Liens externes

NGC 3132  •  NGC 3133  •  NGC 3134  •  NGC 3135  •  NGC 3136  •  NGC 3137  •  NGC 3138  •  NGC 3139  •  NGC 3140  •  NGC 3141  •  NGC 3142  •  NGC 3143  •  NGC 3144  •  NGC 3145  •  NGC 3146  •  NGC 3147  •  NGC 3148

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