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NGC 6786

NGC 6786
Image illustrative de l’article NGC 6786
La galaxie spirale barrée NGC 6786.
Données d’observation
(Époque J2000.0)
Constellation Dragon
Ascension droite (α) 19h 10m 53,91s[1]
Déclinaison (δ) +73° 24′ 36,6″ [1]
Magnitude apparente (V) 12,9[2]
13,7 dans la Bande B[2]
Brillance de surface 12,89 mag/am2[2]
Dimensions apparentes (V) 1,1′ × 0,9′[2]
Décalage vers le rouge 0,025244 ± 0,000026[1]
Angle de position 45°[2]

Localisation dans la constellation : Dragon

(Voir situation dans la constellation : Dragon)
Astrométrie
Vitesse radiale 7 568 ± 8 km/s [1]
Distance 110,22 ± 7,72 Mpc (∼359 millions d'al)[1]
Caractéristiques physiques
Type d'objet Galaxie spirale barrée
Type de galaxie SB?[1]SBbc[2],[3]SABb[4]
Dimensions environ 40,15 kpc (∼131 000 al)[1],[a]
Découverte
Découvreur(s) Lewis Swift[3]
Date [3]
Désignation(s) PGC 62864
UGC 11414
CGCG 341-19
VV 414
IRAS 19119+7319
7ZW 864
KCPG 538A[2]
Liste des galaxies spirales barrées
modifier 

NGC 6786 est une galaxie spirale barrée située dans la constellation du Dragon. Sa vitesse par rapport au fond diffus cosmologique est de 7 473 ± 10 km/s[1], ce qui correspond à une distance de Hubble de 110,2 ± 7,7 Mpc (∼359 millions d'al)[1]. NGC 6786 a été découverte par l'astronome américain Lewis Swift en [3].

NGC 6786 présente une large raie HI et est une galaxie active de type Seyfert 2. Elle renferme également des régions d'hydrogène ionisé (HII)[1].

NGC 6786 forme une paire de galaxies en interaction avec sa voisine PGC 62867[1].

Les galaxies en interaction NGC 6786 (à droite) et PGC 62867 (à gauche) par le télescope spatial Hubble.

Supernova

La supernova SN 2004ed a été découverte dans NGC 6786 le par les astronomes amateurs britanniques M. Armstrong et T. Boles[5]. D'une magnitude apparente de 17,4 au moment de sa découverte, elle était de type II[6].

Notes et références

Notes

  1. ↑ Diamètre dans la bande RC3 D_0 (blue).

Références

  1. ↑ a b c d e f g h i j et k (en) « Results for object NGC 6786 », 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 6700 à 6799 », sur astrovalleyfield.com (consulté le )
  3. ↑ a b c et d (en) Courtney Seligman, « Celestial Atlas Table of Contents, NGC 6750 - 6799 » (consulté le ).
  4. ↑ (en) « NGC 6786 sur HyperLeda » (consulté le )
  5. ↑ (en) M. Armstrong et T. Boles, « Supernova 2004ed in NGC 6786 », International Astronomical Union Circular, vol. 8397,‎ , p. 1 (ISSN 0081-0304, lire en ligne, consulté le )
  6. ↑ « SN 2004ed | Transient Name Server », sur www.wis-tns.org (consulté le )

Voir aussi

Articles connexes

Liens externes

    •  NGC 6778  •  NGC 6779  •  NGC 6780  •  NGC 6781  •  NGC 6782  •  NGC 6783  •  NGC 6784  •  NGC 6785  •  NGC 6786  •  NGC 6787  •  NGC 6788  •  NGC 6789  •  NGC 6790  •  NGC 6791  •  NGC 6792  •  NGC 6793  •  NGC 6794      

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