Ngc 4725

ObjetFiltresBinTemps PoseNombres PosesTemps Total
NomNGC 4725Luminance1 x 1180”391H95
ConstellationChevelure de BérécineRouge1 x 1180”422H10
Distance55 Millions AL Vert1 x 1180”422H10
Détail prise de vueBleu1 x 1180”422H10
LieuMaison-Maugis Normandie

S21 x 1
Date acquisition03/04/2022 au 10/04/2022
1 x 1
SetupO31 X 1
InstrumentSkyvision MTN 250Totaux1628H10
Diamètre250 mmBias1 X 199
Focale900 mmDark1 X 151
Rapport F/D3,6Flat1 X 111
Monture EQ8 SkywatcherAcquisition faite parTeam Newastro
Caméra acquisitionZWO Asi 6200 MMTraitement fait parTeam Newastro
Caméra de guidageAtik 314 LLogiciels utilisés
Montage de guidageDO SkymecaAcquisitionTheSkyX , Focusmax, Maxpilote
Echantillonage0.86 arcsTraitementPixinsight, Photoshop


NGC 4725 is an intermediate barred spiral galaxy with a prominent ring structure, located in the northern constellation of Coma Berenices near the galactic north pole.  It was discovered by the German-born astronomer William Herschel on 6 April 1785.  The galaxy is about 40 mega-light years away from the Milky Way.

NGC 4725 is the brightest member of the Coma I Group of the Coma-Sculptor Cloud, although it is relatively isolated from the other members of this group. This galaxy is highly perturbed and interacts with the neighbouring spiral galaxy NGC 4747, with its spiral arms showing signs of deformation. The pair has an angular separation of 24′ , which corresponds to a projected linear separation of 370 kly . A tidal plume extends from NGC 4747 towards NGC 4725. 


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DÉCLINAISON:+25°30′ 03s