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Community photo entitled Comet 3i/Atlas by Prabhakaran Andiappan on 11/13/2025 at Abu Dhabi, UAE

Comet 3i/Atlas

On 11/13/2025 05:25 am by Prabhakaran Andiappan | Abu Dhabi, UAE

Comet 3I/ATLAS is currently visible with a striking feature: a sunward-facing tail, also known as an anti-tail. This structure appears to point toward the Sun, likely due to dust particles aligned along our line of sight, creating a dramatic optical effect. At a distance of approximately 1.8 AU from Earth, the comet is traveling at 58 km/s on a hyperbolic path, confirming its interstellar origin. A fainter, more typical tail extends away from the Sun, giving the comet a distinctive bipolar appearance. This particular observation was made during nautical twilight, when the comet was just 15° above the horizon. With my observatory wall obstructing the initial view. I hope to gather more data in the coming days as 3I/ATLAS moves farther from the Sun and climbs higher in the sky.

Equipment:
- Telescope: GSO 12" f/8 Ritchey-Chretien Truss Tube
- Camera: ZWO ASI294MM Pro
- Mount: iOptron CEM70G
- Filter: Antlia Luminance 36 mm
- Accessories: Player One FHD-OAG MINI, Player One Phoenix Wheel 7x36mm, TS-Optics 2" CCD Reducer 0.67x for RC & flatfield telescopes ab F/8 (CCD47)
- Software: Adobe Photoshop, Pleiades Astrophoto PixInsight

Stacked it in Pixinsight, removed the stars, stretched it