m100

Galaxie m100

Commentaires sur l’objet photographié

outters-nicolasUn peu à la bourre, je traite des images de castor-Sirene de mars dernier !
Galaxie M100, peu imagée sur le net mais qui vaut le détour, cette galaxie est superbe de détails jusqu’au centre galactique.

Image LRGB

Données techniques

Données techniques de prise de vue

Object :M100
Date : du 9 au 24 mars 2011
Optics :Rcos 12″
Mount : Paramount ME Numéro 3
Location : Castor Sirene observatory
Seeing : FWHM de 1,5 à 2,3 arc sec(ccdinspector)
Ccd : Apogee 16803
filter wheel :Apogee
filters : Astrodon LRGB
Focuser :TCC Rcos
Guiding : MMOAG Astrodon et Atik 314L+
Temp. out : -5 °à 5°
Temp ccd : -25°
Total exposure : 21 h
Luminance 66 x 10mn binning 1×1
Rouge 20 x 10 mn bining 1×1
Vert 20 x 10 mn bining 1×1
Bleu 20 x 10 mn bining 1×1

Données scientifiques

Messier 100 (also known as NGC 4321) is an example of a grand design[4] intermediate spiral galaxy located within the southern part of constellation Coma Berenices. It is one of the brightest and largest galaxies in the Virgo Cluster, located approximately 55 million light-years[3] distant from Earth and has a diameter of 107,000 light years. It was discovered by Pierre Méchain on March 15, 1781 and was subsequently entered in Messier’s catalogue of nebulae and star clusters[5] after Charles Messier[6] made observations of his own on April 13, 1781. The galaxy was one of the first spiral galaxies[6] to be discovered, and was listed as one of fourteen spiral nebulae by Lord William Parsons of Rosse in 1850. Two satellite galaxies[7][8] named NGC 4323 -connected with M100 by a bridge of luminous matter- and NGC 4328 are present within this galaxy.

Messier 100
M100.jpg
Observation data (J2000 epoch)
Constellation Coma Berenices[1]
Right ascension 12h 22m 54.9s[2]
Declination +15° 49′ 21″[2]
Redshift 1571 ± 1 km/s[2]
Distance 55 Mly[3]
Apparent magnitude (V) 9.5[2]
Characteristics
Type SAB(s)bc[2]
Size 107,000 ly (diameter)
Apparent size (V) 7′.4 × 6′.3[2]
Other designations
NGC 4321