A/2025 Y1

Japanese version
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 Updated on March 8, 2026

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* Profile

Discovery Date December 26, 2025
Magnitude 18.7 mag
Discoverer Asteroid Terrestrial-Impact Last Alert System (ATLAS) search program

The cometary activity of A/2025 Y1 was observed on Jan. 30, 2026, by Taras Prystavski (https://www.facebook.com/groups/227002358661288/permalink/1678767360151440/).

* Orbital Elements

Epoch 2025 Nov. 21.0 TT = JDT 2461000.5
T 2027 Oct. 15.05298 TT                                 Alexandersen
q   2.6085300            (2000.0)            P               Q
z  +0.0006556      Peri.  124.24609     +0.36117641     +0.93066355
 +/-0.0006653      Node   166.54776     -0.91667744     +0.36584854
e   0.9982898      Incl.   14.55282     -0.17103822     +0.00449384
H     6.
From 121 observations 2025 Nov. 19-2026 Jan. 12, mean residual 0".5.

* Finding Charts

* Magnitudes Graph

        m1 = 6.0 + 5 log d + 10.0 log r

        * Gray curve is:  H = 10.0  G = 0.15

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The orbital elements are published on M.P.E.C. 2026-A90.
The charts are made with StellaNavigator Ver.11 (AstroArts).
The magnitudes graphs are made with Comet for Windows.

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Copyright(C) Seiichi Yoshida (comet@aerith.net). All rights reserved.