ObjetFiltresBinTemps PoseNombres PosesTemps Total
NomM100Luminance1 x 15′675H58
ConstellationChevelure de BéréniceRouge1 x 15′534h42
Distance67 Millions ALVert1 x 15′564h67
Détail prise de vueBleu1 x 15′564h67
LieuCotes de Meuse
Date acquisition06/03/21 au 05/04/20211 x 1
InstrumentNewton Skyvision Mtn 250Totaux23219h34
Diamètre250 mmBias99
Focale900 mmDark19
Rapport F/D3,6Flat11
MontureEQ8 SkywatcherAcquisition faite parTeam Newastro
Caméra acquisitionMorovian G2 4000Traitement fait parTeam Newastro
Caméra de guidageAtik 314L LodestarLogiciels utilisés
Montage de guidageDO SkymecaAcquisitionTheSkyX , Focusmax, Maxpilote
Echantillonage1,7 arcsTraitementPixinsight, Photoshop


M100 is a spiral galaxy, seen exactly from above, located in the Chevelure de Bérénice. It was discovered in 1781 by Pierre Méchain and included by his friend Charles Messier in his catalogue a few weeks later.

Thanks to the discovery of 20 Cepheid stars by the Hubble Space Telescope in 1993, the distance of the galaxy was estimated at 56 million light years. It was M100 that served as a test for the space telescope and showed its optical defects at the beginning of the mission. The galaxy is located in the Virgo cluster, of which it is one of the main components along with M87. Its brightest spiral arms are filled with blue stars resulting from the interaction of the galaxy with neighbouring galaxies. The diameter of the galaxy is larger than that of the Milky Way, at about 120 000 light years.

During the 20th century, no less than four supernovas were recorded in the galaxy: 1901B, 1914A, 1959E and 1979C, which reached a magnitude of 11.6 in April 1979, which is rare for such a distant galaxy.

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DÉCLINAISON:+15°49′ 19s