If and when you are attending to the EPSC-DPS 2025 in Helsinki, check the "Helsinki Events" that complement the official program of the conference.
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Jos ja kun osallistutte EPSC-DPS 2025 -konferenssiin Helsingissä, tsekatkaa myös "Helsinki Events" -osion tapahtumat, jotka täydentävät konferenssin virallista ohjelmaa.
Interstellar comet 3I/ATLAS is approaching the Sun at a speed of 58 km/s and is brightening week by week. The brightness has increased by about 1 magnitude in 3 weeks, now reaching magnitude 16.4V.
Attached is an astrometrically measured black and white image of the Clear filter, 12x2min, and an RGB image of 3x6x3min. Images taken last night 2025-08-15 from observatory Y71 Makroskooppi at Spain.
The interstellar visitor #comet 3I/ATLAS, which may be over 7 billion years old and originated in the thick galactic disk of our Milky Way, is already clearly visible as a brighter mag 17.7 object as it approaches the Sun and Earth. Here comet's movement last night in the star crowded area of Milky Way during 60x2 minutes exposures 2025-07-25 21:25 - 23:29 UT, from observatory Y71 Makroskooppi Fregenal de la Sierra Spain.
New third #interstellar object #3I/ATLAS has been found few days ago. It has a double naming 3I/ATLAS = C/2025 N1 (ATLAS) because it is also a #comet having a short tail.
Here an animation of it's movement taken last night 2025-07-03, 45x120s exposures from our remote controlled Y71 observatory at Spain using 12" telescope. Field of view is about 3 arc minutes / 0.05 degrees.
Harri Haukka
Tomppa 🇺🇦
Cédric Champeau
Daniel Fischer