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tech / alt.astronomy / solar orbiter sees xmas comet

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o solar orbiter sees xmas cometMrPostingRobot

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solar orbiter sees xmas comet

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https://www.novabbs.com/tech/article-flat.php?id=3769&group=alt.astronomy#3769

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From: MrPostin...@kymhorsell.com
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Subject: solar orbiter sees xmas comet
Date: Sat, 25 Dec 2021 03:41:40 +1100
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 by: MrPostin...@kymhorsell.com - Fri, 24 Dec 2021 16:41 UTC

<https://scitechdaily.com/a-christmas-comet-for-solar-orbiter-heliospheric-imager-captures-comet-leonard/>

A Christmas Comet for Solar Orbiter: Heliospheric Imager Captures Comet Leonard

European Space Agency (ESA)
Dec 24, 2021

Comet Leonard by SoloHI
<https://scitechdaily.com/images/Comet-Leonard-by-SoloHI.jpg>
Frame from a movie captured by the SoloHI instrument on the ESA/NASA Solar
Orbiter spacecraft of Comet Leonard on Dec 17-18, 2021. Credit:
ESA/NASA/NRL/SoloHI

Comet Leonard, a mass of space dust, rock, and ice about a kilometer
across is heading for a close pass of the Sun on 3 Jan, and the
ESA/NASA Solar Orbiter spacecraft has been watching its evolution over
the last days.

The Solar Orbiter Heliospheric Imager (SoloHI) captured an animated
sequence of images 17-19 Dec that shows comet Leonard streaking
diagonally across the field of view with the Milky Way as a stunning
backdrop. Venus and Mercury are also visible in the top right, Venus
appearing brighter and moving from left to right.

<https://www.youtube.com/embed/UyqXfHG0PYo?feature=oembed>

The comet is currently on its inbound journey around the Sun with its
tail streaking out behind. When SoloHI recorded these images, the
comet was approximately between the Sun and the spacecraft, with its
gas and dust tails pointing towards the spacecraft. Toward the end of
the image sequence, our view of both of the tails improves as the
viewing angle at which we see the comet increases, and SoloHI gets a
side-on view of the comet.

A faint coronal mass ejection front is also visible moving from the
right hand side of the frame in the final second of the movie.

SoloHI will continue observing the comet until it leaves its field of
view on Dec 22, and will be complemented by other instrument
observations.

....

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