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Image of the day 11/13/2018

    APOD: 2018 November 15 - Comet 46P Wirtanen, 


            Alex Cherney

    APOD: 2018 November 15 - Comet 46P Wirtanen

    Technical card

    Imaging telescope or lens:SDM 22" F/3.6 Tracking Dobsonian

    Imaging camera:Sony A7s

    Accessory:Teleview Paracor

    Resolution: 2564x3062

    Date:Nov. 7, 2018

    Time: 1330

    Frames: 99

    FPS: 0.06670

    Focal length: 2350

    Seeing: 3

    Transparency: 4 job: 2365019

    Data source: Traveller


    Periodic Comet 46P/Wirtanen;s 5.4 year long looping orbit takes it closest to Earth and the Sun in mid December, 2018. Fluorescing in sunlight, its spherical coma is about half the angular size of a full moon in this southern hemisphere telescopic view from November 7. Then the comet was about 2 light-minutes away or 35 million kilometers from Earth-bound telescopes, so the pretty greenish coma seen here is around 150,000 kilometers across. That makes it about the size of Jupiter. The stack of digital images also reveals a very faint tail extending toward 4 o'clock with a distant background galaxy notable at the upper left. As a regular visitor to the inner Solar System, comet 46P/Wirtanen was once the favored rendezvous target for ESA's comet exploring Rosetta mission.



    Alex Cherney
    License: Attribution-NonCommercial-NoDerivs Creative Commons


    APOD: 2018 November 15 - Comet 46P Wirtanen, 


            Alex Cherney