NGC 5982 ist eine
Elliptische Galaxie mit
aktivem Galaxienkern vom
Hubble-Typ E3 im Drache am
Nordsternhimmel. Sie ist schätzungsweise 142 Millionen Lichtjahre von der
Milchstraße entfernt und hat einen Durchmesser von etwa 110.000 Lichtjahren. Gemeinsam mit
NGC 5981 und
NGC 5985 bildet sie das Galaxientrio
Holm 719 oder
KTG 64 und ist das hellste Mitglied der NGC 5982-Gruppe zu der weiterhin noch
NGC 5976,
NGC 5987 und
NGC 5989 gehören.NGC 5982 is an
elliptical galaxy located in the constellation
Draco. It is located at a distance of circa 130 million
light years from Earth, which, given its apparent dimensions, means that NGC 5982 is about 100,000 light years across. It was discovered by
William Herschel on May 25, 1788.
NGC 5982 has a kinematically decoupled nucleus, with its major axis being nearly perpendicular to the rotation of the galaxy. NGC 5982 features many
shells in its envelope, nearly 26. The shells form circular arcs, with the further being located at a radius of 150 arcseconds along the major axis of the galaxy,=10.5px while the innermost one lies 8 arcseconds off the nucleus. The shells and the kinematically decoupled nucleus are the result of the
merger of the elliptical galaxy with a small elliptical galaxy.
The galaxy has
globular clusters that belong in two populations, red and blue. The age of the globular clusters in NGC 5982 is over 5 billion years. The luminosity of NGC 5982 is dominated by light emitted by old stars.=10.5px In the centre of NGC 5982 lies a
supermassive black hole whose mass is estimated to be 8.3×108
M☉ (108.92 M☉) based on the
M–sigma relation.The nucleus may display low level activity and has been categorised as a possible
LINER.From Wikipedia, the free encyclopedia
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