IC 4838

IC 4838
Image illustrative de l’article IC 4838
La galaxie spirale IC 4838 par le relevé 2MASS.
Données d’observation
(Époque J2000.0)
Constellation Paon
Ascension droite (α) 19h 16m 46,19s[1]
Déclinaison (δ) −61° 36′ 51,8″
Magnitude apparente (V) 13,7 [2]
14,3 dans la Bande B [2]
Brillance de surface 13,23 mag/am2[2]
Dimensions apparentes (V) 1,3′ × 0,5′ [2]
Décalage vers le rouge 0,014440 ± 0,000210[1]
Angle de position 64°[2]

Localisation dans la constellation : Paon

(Voir situation dans la constellation : Paon)
Astrométrie
Vitesse radiale 4 329 ± 63 km/s [1]
Distance 63,10 ± 4,51 Mpc (∼206 millions d'al) [1]
Caractéristiques physiques
Type d'objet Galaxie spirale
Type de galaxie Pair?[1] Sbc? pec[3] S/P[2] Sbc/M[4]
Dimensions environ 40,44 kpc (∼132 000 al)[1],[a]
Découverte
Découvreur(s) DeLisle Stewart[3]
Date [3]
Désignation(s) PGC 63002
ESO 141-45
AM 1912-614
IRAS 19122-6142 [2]
Liste des galaxies spirales
modifier 

IC 4838 est une galaxie spirale située dans la constellation du Paon. Sa vitesse par rapport au fond diffus cosmologique est de 4 278 ± 63 km/s, ce qui correspond à une distance de Hubble de 63,1 ± 4,5 Mpc (∼206 millions d'al)[1]. Cette galaxie a été découverte par l'astronome américain DeLisle Stewart en 1901.

La base de données NASA/IPAC indique que NGC 4838 pourrait être une paire de galaxies (Double? system), Simbad indique qu'il s'agit de galaxies en interaction[5] et HyperLeda indique qu'il s'agit d'un système multiple. L'image du relevé 2MASS ne montre qu'une galaxie, mais celle du relevé DSS semble indiquer qu'il y a à cet endroit deux noyaux brillants.

Vue interactive d'IC 4828 dans Aladin Lite

Groupe d'IC 4845

Selon A. M. Garcia NGC 6769 fait partie du groupe d'IC 4845. Ce groupe de galaxies renferme au moins 14 membres dont six du New General Catalogue et sept de l'Index Catalogue. Les autres galaxies du groupe sont NGC 6739, NGC 6746, NGC 6769, NGC 6770, NGC 6771, NGC 6782, IC 4827, IC 4828, IC 4831, IC 4842, IC 4845, IC 4866 et ESO 141-21[6].

Notes et références

Notes

  1. ↑ Diamètre isophote du relevé ESO-LV Quick Blue"" IIa-O.

Références

  1. ↑ a b c d e f et g (en) « Results for object IC 4838 », 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», IC 4800 à 4899 », sur astrovalleyfield.com (consulté le )
  3. ↑ a b et c (en) Courtney Seligman, « Celestial Atlas Table of Contents, IC 4700 - 4759 » (consulté le ).
  4. ↑ (en) « IC 4838 », HyperLeda (consulté le )
  5. ↑ (en) « IC 4838 -- Interacting Galaxies », Simbad (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)

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