NGC 827

NGC 827
Image illustrative de l’article NGC 827
La galaxie spirale NGC 827
Données d’observation
(Époque J2000.0)
Constellation Baleine
Ascension droite (α) 02h 08m 56,2s[1]
Déclinaison (δ) 07° 58′ 17″ [1]
Magnitude apparente (V) 12,8 [2]
13,6 dans la Bande B[2]
Brillance de surface 13,00 mag/am2[2]
Dimensions apparentes (V) 2,0′ × 0,6′ [2]
Décalage vers le rouge +0,011555 ± 0,000005[1]
Angle de position 85°[2]

Localisation dans la constellation : Baleine

(Voir situation dans la constellation : Baleine)
Astrométrie
Vitesse radiale 3 464 ± 1 km/s [1]
Distance 47,15 ± 3,31 Mpc (∼154 millions d'al)[1]
Caractéristiques physiques
Type d'objet Galaxie spirale
Type de galaxie S?[1] Sbc[2] Sbc?[3]
Dimensions environ 39,10 kpc (∼128 000 al)[1],[a]
Découverte
Découvreur(s) William Herschel[3]
Date [3]
Désignation(s) PGC 8196
MCG 1-6-46
UGC 1640
CGCG 413-47
IRAS 02062+0744[2]
Liste des galaxies spirales
modifier 

NGC 827 est une galaxie spirale située dans la constellation de la Baleine. Sa vitesse par rapport au fond diffus cosmologique est de 3 196 ± 19 km/s, ce qui correspond à une distance de Hubble de 47,2 ± 3,3 Mpc (∼154 millions d'al)[1]. NGC 827 a été découverte par l'astronome germano-britannique William Herschel en 1784.

NGC 827 présente une large raie HI[1].

À ce jour, six de mesures non basées sur le décalage vers le rouge (redshift) donnent une distance de 49,783 ± 3,330 Mpc (∼162 millions d'al)[4], ce qui est à l'intérieur des valeurs de la distance de Hubble.

Groupe de NGC 827

La galaxie NGC 827 est la plus grosse et la plus brillante d'un trio de galaxies. Les deux autres galaxies du groupe de NGC 827 sont UGC 1572 et UGC 1663[5].

Notes et références

Notes

  1. ↑ Diamètre dans la bande POSS1 103a-O.

Références

  1. ↑ a b c d e f g h et i (en) « Results for object NGC 827 », 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 827 » (consulté le ).
  4. ↑ « Your NED Search Results, Distance Results for NGC 827 », 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 819  •  NGC 820  •  NGC 821  •  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      

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