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To: stefano@bicar.it
From: atel@astronomerstelegram.org
Subject: ATel  17694
Message-Id: <20260223070548.4B90128807E4@server.astronomerstelegram.org>
Date: Mon, 23 Feb 2026 02:05:48 -0500 (EST)

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Posted: Within the last 24 hours
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ATEL #17694							     ATEL #17694

Title:	Independent Discovery of a Probable Nova in M81, M81N 2026-02a
Author:	K. Hornoch, H. Kucakova (Ondrejov), A. W. Shafter (SDSU)
Queries:	k.hornoch@centrum.cz
Posted:	23 Feb 2026; 05:54 UT
Subjects:Optical, Nova, Transient

We report the independent discovery of a probable nova in M81 on a co-added
6030-s unfiltered CCD frame taken on 2026 Feb. 20.893 UT with the 0.65-m
telescope at Ondrejov.

The object was independently discovered on Feb. 20.4134 UT by J. Tonry
et al. (ATLAS) and designated as AT 2026dvq.

The object designated by us as M81N 2026-02a = PNV J09550159+6908427 is
located at R.A. = 9h55m01s.59, Decl. = +69o08'42".7 (equinox 2000.0), which
is 169.0" west and 287.6" north of the center of M81 (see link to discovery
image below).

Here we list the observing dates and corresponding photometry:

<span class="inner-pre" style="font-size: 13px"> 
Date [UT]    |  Mag   | Err  | Filter  | Telescope

2026-02-15.919 | >21.7  |      | C       | OND 
2026-02-20.893 |  19.01 | 0.08 | C       | OND

</span>

As with all extragalactic novae, follow-up spectroscopic and photometric
observations to determine the nova's spectroscopic class and rate of decline
(speed class) are encouraged.

The OND 0.65-m is a reflecting telescope at the Ondrejov observatory operated
jointly by the Astronomical Institute of ASCR and the Astronomical Institute
of the Charles University of Prague, Czech Republic. It uses a Moravian
Instruments G2-3200 MkII CCD camera (with a Kodak KAF-3200ME sensor and
standard BVRI photometric filters) mounted at the prime focus. The unfiltered
OND photometry was calibrated against R-band comparison stars from 
<a href="http://adsabs.harvard.edu/abs/1995AJ....109.1055P">Perelmuter
& Racine (1995)</a>.

Discovery image: http://www.asu.cas.cz/~asteroid/M81N2026-02a.png
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