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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://fosstodon.org/users/AkaSci/statuses/113221710508650818">AkaSci 🛰️ (akasci@fosstodon.org)'s status on Tuesday, 01-Oct-2024 09:50:15 JST</a><a href="https://fosstodon.org/@AkaSci" title="akasci@fosstodon.org"><img src="https://gnusocial.jp/avatar/20805-48-20221219024513.webp" width="48" height="48" alt="AkaSci 🛰️" style="position: absolute; left: 0; top: 0;">AkaSci 🛰️</a><div><a href="https://fosstodon.org/@AkaSci/113221523456862441" rel="in-reply-to">in reply to</a><ul><li></ul></div></section><article><p>According to the website <a href="http://astro.vanbuitenen.nl/comet/2023A3" rel="nofollow noreferrer">http://astro.vanbuitenen.nl/comet/2023A3</a> run by <a href="https://astrodon.social/@giddgvb">@giddgvb</a>, the brightness of Comet C/2023 A3 (Tsuchinshan-ATLAS) has reached magnitude 1.8. There are reports of it being visible to the naked eye under good viewing conditions.</p><p>Note that the comet will get closer to the Sun as seen from earth over the following days, making observations difficult, until it emerges in the evening sky around October 10.<br>8/n</p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/3754250#notice-7349442">In conversation</a><time datetime="2024-10-01T09:50:15+09:00" title="Tuesday, 01-Oct-2024 09:50:15 JST">about 2 months ago</time> <span>from <span><a href="https://fosstodon.org/@AkaSci/113221710508650818" rel="external" title="Sent from fosstodon.org via ActivityPub">fosstodon.org</a></span></span><a href="https://fosstodon.org/@AkaSci/113221710508650818">permalink</a><h4>Attachments</h4><ol><li><article><header><div>Domain not in remote thumbnail source whitelist: astro.vanbuitenen.nl</div><h5><a href="http://astro.vanbuitenen.nl/comet/2023A3">C/2023 A3 (Tsuchinshan-ATLAS) | astro.vanbuitenen.nl</a></h5><div></div></header><div></div><footer></footer></article></li><li><label><a rel="external" href="https://gnusocial.jp/attachment/3244200">The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations respectively from COBS or the MPC. The gray curve is based on the absolute magnitude and slope parameter as calculated from the original MPEC, or the latest values provided by the MPC (6.50 + 5 log[∆] + 8.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 6.33 + 5 log[∆] + 7.92 log[r]). The additional green curve shows the effect of forward scattering, occurring when the comet is between the earth and the sun, for a gas-to-dust light ratio δ90 of 0.30. (See Marcus 2007) http://astro.vanbuitenen.nl/comet/2023A3</a></label><br><a href="https://cdn.fosstodon.org/media_attachments/files/113/221/683/432/430/016/original/eea45ca20bc76171.png" rel="external">https://cdn.fosstodon.org/media_attachments/files/113/221/683/432/430/016/original/eea45ca20bc76171.png</a></li></ol></footer></blockquote>

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AkaSci 🛰️ (akasci@fosstodon.org)'s status on Tuesday, 01-Oct-2024 09:50:15 JSTAkaSci 🛰️
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- Gideon van Buitenen
According to the website http://astro.vanbuitenen.nl/comet/2023A3 run by @giddgvb, the brightness of Comet C/2023 A3 (Tsuchinshan-ATLAS) has reached magnitude 1.8. There are reports of it being visible to the naked eye under good viewing conditions.
Note that the comet will get closer to the Sun as seen from earth over the following days, making observations difficult, until it emerges in the evening sky around October 10.
8/n
In conversationabout 2 months ago from fosstodon.orgpermalink
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1. Domain not in remote thumbnail source whitelist: astro.vanbuitenen.nl
  C/2023 A3 (Tsuchinshan-ATLAS) | astro.vanbuitenen.nl
2. The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations respectively from COBS or the MPC. The gray curve is based on the absolute magnitude and slope parameter as calculated from the original MPEC, or the latest values provided by the MPC (6.50 + 5 log[∆] + 8.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 6.33 + 5 log[∆] + 7.92 log[r]). The additional green curve shows the effect of forward scattering, occurring when the comet is between the earth and the sun, for a gas-to-dust light ratio δ90 of 0.30. (See Marcus 2007) http://astro.vanbuitenen.nl/comet/2023A3
  https://cdn.fosstodon.org/media_attachments/files/113/221/683/432/430/016/original/eea45ca20bc76171.png

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