NGC 590

NGC 590
Image illustrative de l’article NGC 590
La galaxie spirale barrée NGC 590
Données d’observation
(Époque J2000.0)
Constellation Andromède
Ascension droite (α) 01h 33m 40,9s[1]
Déclinaison (δ) 44° 45′ 43″ [1]
Magnitude apparente (V) 13,0 [2]
13,9 dans la Bande B [2]
Brillance de surface 14,32 mag/am2[2]
Dimensions apparentes (V) 2,6 × 1,3[2]
Décalage vers le rouge +0,016531 ± 0,000043[1]
Angle de position 150°[2]

Localisation dans la constellation : Andromède

(Voir situation dans la constellation : Andromède)
Astrométrie
Vitesse radiale 4 956 ± 13 km/s [1]
Distance 69,49 ± 4,87 Mpc (∼227 millions d'al) [1]
Caractéristiques physiques
Type d'objet Galaxie spirale barrée
Type de galaxie SBa[1] SB0-a[2] SB0(s)a?[3] SBa[4]
Dimensions environ 75,59 kpc (∼247 000 al)[1],[a]
Découverte
Découvreur(s) Heinrich d'Arrest[3]
Date [3]
Désignation(s) PGC 5808
MCG 7-4-3
UGC 1109
CGCG 537-133
KCPG 37B [2]
Liste des galaxies spirales barrées

NGC 590 est une vaste galaxie spirale barrée située dans la constellation d'Andromède. Sa vitesse par rapport au fond diffus cosmologique est de 4 712 ± 21 km/s, ce qui correspond à une distance de Hubble de 69,5 ± 4,9 Mpc (∼227 millions d'al)[1]. NGC 590 a été découverte par l'astronome prussien Heinrich d'Arrest en 1865.

Wolfgang Steinicke et le professeur Seligman classent cette galaxie comme une lenticulaire, mais l'image de l'étude SDSS montre assez clairement la présence de bras spiraux ainsi qu'une barre traversant le centre de la galaxie. Le classement de spirale barrée (SBa) par la base de données NASA/IPAC et par HyperLeda semble plus approprié.

La classe de luminosité de NGC 590 est I et elle présente une large raie HI[1].

Avec une brillance de surface égale à 14,32 mag/am2, on peut qualifier NGC 590 de galaxie à faible brillance de surface (LSB en anglais pour low surface brightness). Les galaxies LSB sont des galaxies diffuses (D) avec une brillance de surface inférieure de moins d'une magnitude à celle du ciel nocturne ambiant.

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 590 », 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 500 à 599 », sur astrovalleyfield.com (consulté le )
  3. a b et c (en) Courtney Seligman, « Celestial Atlas Table of Contents, NGC 590 » (consulté le )
  4. (en) « NGC 590 sur HyperLeda » (consulté le )

Voir aussi

Articles connexes

Liens externes

    •  NGC 582  •  NGC 583  •  NGC 584  •  NGC 585  •  NGC 586  •  NGC 587  •  NGC 588  •  NGC 589  •  NGC 590  •  NGC 591  •  NGC 592  •  NGC 593  •  NGC 594  •  NGC 595  •  NGC 596  •  NGC 597  •  NGC 598      

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