Electronic Telegram No. 5723
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
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V1452 TAURI = NOVA TAURI 2026 = TCP J05210763+2338194
     K. Sokolovsky, K. Barnhart, D. Perla, P. Acharya, J. Worley, V. Antoniou, 
and E. Aydi, Texas Tech University, report their discovery of an apparent nova
(mag 11.2) on unfiltered CMOS camera images obtained on Aug. 6.411 UT with a 
Rokinon 135-mm-f.l. camera lens in the course of the New Milky Way Survey.
The variable is located at R.A. = 5h21m07s.63, Decl. = +23d38'19".4 (equinox 
J2000.0), and the provisional designation TCP J05210763+2338194 was assigned
when it was posted to the Central Bureau's TOCP webpage.  Nothing was visible
at this location on a similar image obtained on Aug. 5.449, to a limiting mag
of 14.6.  The discovery images and finder charts are available at website URL
https://tau.kirx.net/img/TCPJ05210763+2338194/.  Follow-up NMWS imagery 
obtained with a similar camera set-up at the Astroverty astrofarm in Nizhnii
Arkhyz, Karachay-Cherkessia, Russia by S. Korotkiy (Astroverty, Ka-Dar), 
Sokolovsky, and R. Sukhogolovy on Aug. 6.952 yield unfiltered mag 11.0.
     K. Yoshimoto, Yamaguchi, Japan, reports position end figures 07s.66, 
19".6 and mag 11.0 on Aug. 7.475 UT using a 0.11-m f/5.0 astrograph (+ green 
filter + CCD) located at the Utah Desert Remote Observatory (near Beryl 
Junction, UT, USA), noting that the variable appeared red.
     A. Pearce, Nedlands, Western Australia, reports position end figures
07s.62, 20".1 and magnitudes T_B = 9.78, V = 9.08, T_R = 8.57 from CMOS 
imaging obtained on Aug. 10.911 UT with a 0.05-m refractor (Gaia DR2 catalogue 
positions for comparison stars) for TCP J05210763+2338194.  Pearce notes that
there appears to be a faint uncatalogued star visible on PANSTARRS images at 
this location.  CCD images by Pearce on Aug. 12.172 with a 0.43-m reflector
located at Alnitak Observatory in Nerpio, Spain, reveal positon end figures
07s.62, 20".1 and magnitudes V = 8.96, R = 8.36, I = 7.74.
     Visual magnitude estimates for TCP J05210763+2338194 from A. Amorim, 
Florianopolis, Brazil, using a 0.09-m refractor:  Aug. 9.35 UT, 9.9; 18.35,
10.0; 21.36, 9.1.
     Low-resolution spectroscopy by Munari et al. on Aug. 8.125 UT with the 
Varese 0.84-m telescope (range 382-920 nm) show Balmer, O I, and Fe II 
emission lines superimposed on a smooth continuum; the Balmer lines show an 
emission component (FWHM = 800 km/s) with a sharper P-Cyg absorption that is 
blue-shifted by 500 km/s.  They write that the spectrum appears to be that of 
a standard Fe II-type nova presumably in the early post-maximum phase (cf. 
website URL https://www.astronomerstelegram.org/?read=17950).
     E. Kazarovets (Institute of Astronomy, Moscow) writes that the permanent
GCVS designation V1452 Tau has been assigned to this nova.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2026 CBAT
2026 August 21                   (CBET 5723)              Daniel W. E. Green