Space telescope “Hubble” has confirmed the beginning of the destruction of the nucleus of the interstellar comet Borisov after a rendezvous with the Sun. He separated a fragment, it is reported portal The Astronomer”s Telegram.
Comet 2I/Borisov was discovered on 30 August 2019, soon after it turned outthat its orbit has an eccentricity greater than three, which makes it the second known interstellar object. The study of such bodies allows you to learn about the properties of planetesimals in protoplanetary disks around other stars, which for a comet Borisov is now following lots of ground and space telescopes. For all the short time of research I found out that it is very similar for similar objects in the Solar system, to estimate the length of her tail, to reveal the expiration of the molecules of CYANOGEN and to assess the rate of water loss from the surface of its nucleus.
In early December last year, the comet passed its perihelion and began to move away from the Sun. In early March, the Polish astronomers noticed two splash of brightness of the comet, which was interpreted as the beginning of fragmentation of the comet’s nucleus due to its heating by the Sun and, as a consequence, the increasing activity of the comet. To confirm this observations connected space telescope “Hubble”. In the image taken on 23 March 2020, shows a solid core, and shots from 28 and 30 March show two separate components spaced 180 km and aligned with the major axis of the dust coma.
It is assumed that a fragment of the comet is removed from the nucleus with a speed of about thirty inches per second, which is typical of a disintegrating comet in the Solar system and is comparable with the escape velocity for the comet’s nucleus submillimetrovogo radius. It is expected that the Hubble will continue to monitor the comet that will be visible to telescopes for at least another few months.
Earlier we talked about how the first open interstellar asteroid Omwamwi astronomers recognized planetesimal out of his system.