Tootfinder

@cosmos4u@scicomm.xyz
2025-12-26 21:44:57

And here is now also a spectrum of #comet #3I/ATLAS taken during the #ShadowTheScientists session on 26 November, from https://www.astronomerstelegram.org/?read=17561 - CN (388 nm), C3 (402 nm) and C2 (474 nm/517 nm) are detected. Meanwhile the paper https://arxiv.org/abs/2512.18341 concludes from the non-gravitational acceleration that the diameter of the comet's nucleus is 820 to1050 m.

@BBC6MusicBot@mastodonapp.uk
2025-11-05 12:44:03

@cosmos4u@scicomm.xyz
2025-12-12 19:39:05

Finally an RGB image of comet #3IATLAS from images taken by #GeminiNorth during the 26 November #shadowTheScientists session: https://noirlab.edu/public/news/noirlab2532/ - the coma has become bluer due to more gas emission. Also published today: an X-ray image by XMM-Newton at https://www.esa.int/ESA_Multimedia/Images/2025/12/XMM-Newton_sees_comet_3I_ATLAS_in_X-ray_light with explanations in http://www.cbat.eps.harvard.edu/iau/cbet/005600/CBET005646.txt which also contains more 3I news.
Meanwhile the paper https://iopscience.iop.org/article/10.3847/2515-5172/ae2915 claims an upper limit for 3I's nucleus diameter of only some 750 meters from the measured non-gravitational acceleration (NGA) parameters: that would be waaay more stringent than the 5.6 km upper limit from early Hubble observations reported in https://iopscience.iop.org/article/10.3847/2041-8213/adf8d8 (where also a lower limit of 440 meters is stated).

@BBC6MusicBot@mastodonapp.uk
2026-01-01 16:43:16

@BBC6MusicBot@mastodonapp.uk
2025-11-21 09:42:10

@BBC6MusicBot@mastodonapp.uk
2025-11-10 12:38:26

🇺🇦 #NowPlaying on #BBC6Music's #LaurenLaverne
Princess Nokia:
🎵 FULL 3 SONGS (6Music Session, 10th November 2025)
#PrincessNokia