Kacper Wierzchoś

@WierzchosKacper

Astronomer working in Planetary Defense • Comet Scientist • Asteroid and comet hunter • C/2020 H3 & P/2021 R4 • 🇵🇱 ➔ 🇪🇸 ➔ 🇺🇸 • Opinions my own

Tucson, AZ
Joined November 2017
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  1. Pinned Tweet
    15 Nov 2020

    My most most in-depth interview so far. Thanks Stefan Kürti for the questions! I talk about my career, comet hunting, my telescopes, etc. Be sure to check the other interviews that Stefan has on his website.

    1 retweet 14 likes
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  2. Sep 29

    Just saw comet 29P visually for the first time. This was a big item in my bucket list. I estimated the mag as 10.9, a DC of 7 and a diameter of &0.5'. Obs made with a 12.5" dobsonian from my backyard North of Tucson. It's time form me to get back into visual

    1 reply 2 retweets 35 likes
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  3. Sep 27

    So this is my new favorite train.

    1 like
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  4. Retweeted
    Sep 22

    Reading 's tweets this morning I was trying to get my head around just how big Comet Bernardinelli-Bernstein (aka C/2014 UN271) is. So here's a graphic I've just made to show an (edited) illo of it in comparison to some other Solar System objects.

    A comparison of several Solar System object in relation to the Oort Cloud comet C/2014 UN271. The smallest shown, 4.34KM-wide Comet 67P is shown at bottom left with the bodies increasing in diameter towards the right-hand side. The icy globe of Saturn's moon Enceladus looms in the background at 514km across.
    79 replies 422 retweets 1,368 likes
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  5. Sep 20

    Thanks !

    1:59
    A asteroid and comet hunter made a new discovery last week! Get the full story from here:
    2 replies 4 retweets 12 likes
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  6. Sep 20

    Comet legend Fred Whipple next to his "dirty snowball" model of a comet.

    1 reply 5 retweets 31 likes
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  7. Sep 18

    Seriously considering buying a large Dobsonian telescope... I thought I was done with aperture fever years ago.

    4 replies 13 likes
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  8. Retweeted
    Sep 15

    All is Quiet Among Newly Studied Centaurs

    1 retweet 4 likes
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  9. Retweeted
    Sep 14
    Replying to

    and wrote a nice open-access paper about CO and other volatiles in comets active far from the Sun.

    2 replies 1 retweet 9 likes
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  10. Retweeted
    Sep 13

    Just posted the discovery story of my latest NEA: 2021 RA8. Enjoy :)

    1 reply 1 retweet 17 likes
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  11. Sep 13

    Francois Kugel just shared an image of 95P/Chiron on the Comet Watch FB group. His image shows an elongation in ~ PA 270 consistent with the ATEL that M. Dobson et al. sent on Sept 8. It's been a long time since 95P/Chiron was active! Image by F. Kugel.

    3 retweets 17 likes
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  12. Retweeted
    Sep 11

    P/2021 R4 (Wierzchos) is the 1st periodic comet discovered by

    6 retweets 32 likes
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  13. Sep 11

    Comet P/2021 R4 (Wierzchos) has just been announced by the Minor Planet Center. It is my first named icy mud ball of the periodic variety. I'm trying to keep it cool and all but I CAN'T.

    32 replies 27 retweets 236 likes
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  14. Sep 8

    The Catalina Sky Survey is hiring!

    Have you ever wanted to discover near-Earth asteroids & Comets? Now may be your chance! Catalina Sky Survey is looking for two new observers! Qualified applicants are encouraged to apply!
    2 retweets 3 likes
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  15. Sep 8

    This must be my closest approacher.

    Early this morning, Newly-discovered asteroid 2021 RS2 passed 15,300 km above Japan. This animation includes a ring of geostationary satellites for scale. Simulation: GIF before Twitter compression:
    1 reply 1 retweet 17 likes
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  16. Sep 8

    So during my last observing shift I discovered something interesting in the night sky. Fingers crossed that it gets confirmed 🤞.

    8 replies 36 likes
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  17. Sep 6

    The monsoon made things really green up in Mt. Lemmon.

    1 retweet 9 likes
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  18. Sep 6

    Ran into A/2010 OE101. This object is an obvious comet.

    1 reply 5 retweets 29 likes
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  19. Sep 4

    For now yes. But a camera upgrade is in the works.

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  20. Sep 4

    Our 1m follow-up scope on Mt. Lemmon (AKA I52) has been converted to prime focus. Looking good!

    2 replies 2 retweets 15 likes
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  21. Retweeted
    Jun 14

    (Submitted by )

    3 replies 122 retweets 1,798 likes
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