NGC 512

NGC 512
Image illustrative de l’article NGC 512
La galaxie spirale NGC 512
Données d’observation
(Époque J2000.0)
Constellation Andromède
Ascension droite (α) 01h 23m 59,8s[1]
Déclinaison (δ) 33° 54′ 28″ [1]
Magnitude apparente (V) 13,2 [2]
14,0 dans la Bande B [2]
Brillance de surface 12,72 mag/am2[2]
Dimensions apparentes (V) 1,6′ × 0,4′ [2]
Décalage vers le rouge +0,016238 ± 0,000009 [1]
Angle de position 116° [2]

Localisation dans la constellation : Andromède

(Voir situation dans la constellation : Andromède)
Astrométrie
Vitesse radiale 4 868 ± 3 km/s [1]
Distance 67,65 ± 4,74 Mpc (∼221 millions d'al) [1]
Caractéristiques physiques
Type d'objet Galaxie spirale
Type de galaxie Sab[1],[2] Sab?[3]
Dimensions environ 38,50 kpc (∼126 000 al)[1]
Découverte
Découvreur(s) John Herschel[3]
Date [3]
Désignation(s) PGC 5132
MCG 6-4-13
UGC 944
CGCG 521-18 [2]
Liste des galaxies spirales
modifier 

NGC 512 est une galaxie spirale située dans la constellation d'Andromède. Sa vitesse par rapport au fond diffus cosmologique est de 4 587 ± 20 km/s, ce qui correspond à une distance de Hubble de 67,7 ± 4,7 Mpc (∼221 millions d'al)[1]. NGC 512 a été découverte par l'astronome britannique John Herschel en 1827.

À ce jour, une quinzaine de mesures non basées sur le décalage vers le rouge (redshift) donnent une distance de 77,853 ± 10,684 Mpc (∼254 millions d'al)[4], ce qui est à l'intérieur des valeurs de la distance de Hubble.

Groupe de NGC 507

NGC 512 fait partie du groupe de NGC 507. Ce vaste groupe comprend au moins 42 galaxies dont 21 figurent au catalogue NGC et 5 au catalogue IC. Quatre membres de ce groupe sont aussi des galaxies de Markarian[5]. La plus brillante de ces galaxies est NGC 507 et la plus grosse NGC 536.

Notes et références

  1. ↑ a b c d e f g et h (en) « Results for object NGC 512 », 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 512 » (consulté le )
  4. ↑ « Your NED Search Results, Distance Results for NGC 512 », 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 504  •  NGC 505  •  NGC 506  •  NGC 507  •  NGC 508  •  NGC 509  •  NGC 510  •  NGC 511  •  NGC 512  •  NGC 513  •  NGC 514  •  NGC 515  •  NGC 516  •  NGC 517  •  NGC 518  •  NGC 519  •  NGC 520      

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