2018 S28 BWA

Instrument: T500 + Apogee

Responsable: PP /

Description: Imager la comète 21P/Giacobini

 

Discovered by Michael Giacobini in December 1900 at the Nice observatory, this comet caused some confusion when Ernst Zinner unknowingly observed its return 6.5 years later. The comet’s orbital period was thought to be 6.8 years up until that point.

The icy rock’s return in 2018 is a promising one as it passes the Earth at a distance of 0.39 au. In June, 2018, 21p will be observable from modest sized telescopes sitting in the constellation of Cygnus with a brightness of magnitude 11. It will then brighten rapidly through July and August by which time the nucleus may reach naked eye visibility. Rising in the late evenings, 21p remains well placed for observation for most of the summer. On the night of 03 September, the comet will lie just over 1 degree from bright star Capella in Auriga making it much easier to locate. The comet reaches closest approach on the night 10/11 September, 2018 after which it rises after midnight. Current predictions peak at magnitude 6, so only just within the naked eye threshold. Through the summer months, comet 21p passes within close visual proximity to quite few deep sky objects during its journey through Cygnus, Camelopardalis, Auriga and Monoceros.

 

Source : http://www.cometwatch.co.uk/bright-comets-of-2018/

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La comète qui n'était pas spectaculaire n'a finalement pas été observée.

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Position de la comète le 10/07/2018 à 23h00 (locale)