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NGC 3908

NGC 3908
Image illustrative de l’article NGC 3908
La galaxie elliptique NGC 3908
Données d’observation
(Époque J2000.0)
Constellation Lion
Ascension droite (α) 11h 49m 52,7s[1]
Déclinaison (δ) 12° 11′ 09″ [1]
Magnitude apparente (V) 15,0[2]
16,0 dans la Bande B[2]
Brillance de surface 13,01 mag/am2[2]
Dimensions apparentes (V) 0,4′ × 0,4′[2]
Décalage vers le rouge 0,083995 ± 0,000015[1]
Angle de position N/A[2]

Localisation dans la constellation : Lion

(Voir situation dans la constellation : Lion)
Astrométrie
Vitesse radiale 25 181 ± 4 km/s [1]
Distance 376,50 ± 26,36 Mpc (∼1,23 milliard d'al)[1]
Caractéristiques physiques
Type d'objet Galaxie elliptique
Type de galaxie E[1],[2],[3] E0[4]
Dimensions environ 86,12 kpc (∼281 000 al)[1],[a]
Découverte
Découvreur(s) Lewis Swift[4]
Date [4]
Désignation(s) PGC 36967
NPM1G +12.0292[2]
Liste des galaxies elliptiques
modifier 

NGC 3908 est une vaste et lointaine galaxie elliptique située dans la constellation du Lion. Sa vitesse par rapport au fond diffus cosmologique est de 25 527 ± 25 km/s, ce qui correspond à une distance de Hubble de 377 ± 26 Mpc (∼1,23 milliard d'al)[1]. NGC 3908 a été découverte par l'astronome américain Lewis Swift en 1885.

Présentant une magnitude de 15,0, le professeur Seligman souligne que cette galaxie est trop peu brillante pour que Swift l'ait observée. Son identification à PGC 36967 n'est donc pas certaine. Il pourrait s'agir d'un objet perdu ou non existant[4]. Cette galaxie est l'une des plus lointaines du New General Catalogue.

À ce jour, une mesure non basée sur le décalage vers le rouge (redshift) donne une distance d'environ 370,000 Mpc (∼1,21 milliard d'al)[5]. Cette valeur est à l'intérieur des valeurs de la distance de Hubble.

Notes et références

Notes

  1. ↑ Diamètre isophote du relevé SDSS.

Références

  1. ↑ a b c d e f g et h (en) « Results for object NGC 3908 », 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 3900 à 3999 », sur astrovalleyfield.ca (consulté le )
  3. ↑ (en) « NGC 3908 sur HyperLeda » (consulté le )
  4. ↑ a b c et d (en) Courtney Seligman, « Celestial Atlas Table of Contents, NGC 3908 » (consulté le ).
  5. ↑ « Your NED Search Results. Distance Results for NGC 3908 », sur ned.ipac.caltech.edu (consulté le )

Voir aussi

Articles connexes

Liens externes

    •  NGC 3900  •  NGC 3901  •  NGC 3902  •  NGC 3903  •  NGC 3904  •  NGC 3905  •  NGC 3906  •  NGC 3907  •  NGC 3908  •  NGC 3909  •  NGC 3910  •  NGC 3911  •  NGC 3912  •  NGC 3913  •  NGC 3914  •  NGC 3915  •  NGC 3916      

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