Electronic Telegram No. 5724
Central Bureau for Astronomical Telegrams
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V8055 SAGITTARII = NOVA SAGITTARII 2026 No. 3 = TCP J18251276-2225293
     K. Barnhart, K. Sokolovsky, D. Perla, P. Acharya, J. Worley, V. Antoniou, 
and E. Aydi, Texas Tech University, report their discovery of an apparent nova
(mag 9.4) on unfiltered CMOS camera images obtained on Aug. 19.106 UT with two
identical Rokinon 135-mm-f.l. camera lens in the course of the New Milky Way 
(NMW) Survey.  The variable is located at R.A. = 18h25m12s.76, Decl. = 
-22d25'29".3 (equinox J2000.0), and the provisional designation TCP 
J18251276-2225293 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. 18.116, to a limiting magnitude of 14.7.  The discovery images and finder 
charts are available at URL http://tau.kirx.net/img/TCPJ18251276-2225293/.
The NMW-Texas Tech survey operates at Preston Gott Skyview Observatory near 
Shallowater, TX, USA.  Follow-up NMWS CCD 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 A. 
Getmansky on Aug. 19.763 yields mag 8.7.
     Additioonal digital photometry of TCP J18251276-2225293: Aug. 18.375 UT, 
[12.5 (J. Seach, Grafton, NSW, Australia; DSLR camera + 105-mm-f.l. f/1.4 
lens); 18.483, [13.0 (R. Kaufman, Bright, Victoria, Australia; Canon 800D
camera + 50-mm-f.l. lens; "TG" magnitude); 19.375, V = 9.0 (Seach); 19.411, 
9.0 (Kaufman); 19.476, B = 9.48, V = 8.81, R = 8.34, I = 8.04 (K. Yoshimoto, 
Yamaguchi, Japan; 0.30-m f/4 reflector + CMOS camera; position end figures 
12s.77, 29".2); 19.506, TB = 9.05, V = 8.73, TR = 8.41 (A. Pearce, Nedlands, 
Western Australia; 0.05-m refractor + CMOS camera; position end figures 
12s.76, 29".4); 19.687, B = 9.25, V = 8.77, R = 8.33, I = 8.11 (Pearce; 0.35-m 
reflector + CCD at Perth Observatory, Bickley, W.A.; position end figures 
12s.77, 29".4); 19.979, 8.8 (W. Souza, Sao Paulo, Brazilm Seestar S50 
telescope; tri-color green "TG" magnitude); 20.802, V = 8.5 (G. Pappa; 
remotely using a 0.07-m f/5 quadruplet apochromatic refractor + CMOS camera 
located at Skygems Namibia Remote Observatory); 20.935, 8.9 (Souza).
Pearce notes that Gaia star 4090120793619793536 (G mag 19.5) is approximately 
1".9 from the variable.  Yoshimoto notes that the Pan-STARRS DR2 catalogue 
appears to have a faint star of magnitude 20.5 or fainter at this variable's 
position.
     Visual magnitude estimates for TCP J18251276-2225293:  Aug. 19.98 UT, 8.5 
(J. G. de S. Aguiar, Campinas, Brazil, 0.27-m reflector); 20.94, 8.6 (Aguiar);
21.01, 8.9 (A. Amorim, Florianopolis, Brazil, 0.09-m refractor; moonlight).
     K. Taguchi, Kyoto University, has reported (cf. website URL
https://www.astronomerstelegram.org/?read=17989) that spectroscopy obtained
on Aug. 19.482 UT with the 3.8-m infrared Seimei telescope at Mt. Chikurinji
(Okayama, Japan) show this to be a classical nova with Balmer and O I 
777.4-nm emission lines having P-Cyg profiles.  [Note that this report by
Taguchi was erroneously placed on the emailed version of CBET 5723; that has 
been replaced by the appropriate spectroscopy by Munari et al. in the online 
version of CBET 5723).]
     E. Kazarovets (Institute of Astronomy, Moscow) writes that the permanent
GCVS designation V8055 Sgr 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 5724)              Daniel W. E. Green