V616 MONOCEROTIS SYSTEM
V616 MONOCEROTIS SYSTEM
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A0620-00 is a binary star system in the constellation of Monoceros.
A0620-00 consists of two objects. The first object is a K-type main-sequence star with a spectral type of K5 V. The second object cannot be seen, but based on its calculated mass of 6.6 M☉, it is too massive to be a neutron star and must therefore be a stellar-mass black hole. At a distance of about roughly 3,300 light-years (1,000 parsecs) away, this would make A0620-00 the nearest black hole to the Solar System, closer than GRO J1655-40. The two objects orbit each other every 7.75 hours.
The black hole in A0620-00 pulls matter from the K-type star into an accretion disk. The accretion disk emits significant amounts of visible light and X-rays. Because the K-type star has been pulled into an ellipsoidal shape, the amount of surface area visible, and thus the apparent brightness changes from the Earth's perspective. A0620-00 also bears the variable star designation V616 Monocerotis.
A0620-00 consists of two objects. The first object is a K-type main-sequence star with a spectral type of K5 V. The second object cannot be seen, but based on its calculated mass of 6.6 M☉, it is too massive to be a neutron star and must therefore be a stellar-mass black hole. At a distance of about roughly 3,300 light-years (1,000 parsecs) away, this would make A0620-00 the nearest black hole to the Solar System, closer than GRO J1655-40. The two objects orbit each other every 7.75 hours.
The black hole in A0620-00 pulls matter from the K-type star into an accretion disk. The accretion disk emits significant amounts of visible light and X-rays. Because the K-type star has been pulled into an ellipsoidal shape, the amount of surface area visible, and thus the apparent brightness changes from the Earth's perspective. A0620-00 also bears the variable star designation V616 Monocerotis.
Last Revision: 02. Dec 2018
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