[Iaude] CBET 5133: U SCORPII

quai at eps.harvard.edu quai at eps.harvard.edu
Sat Jun 11 11:51:26 EDT 2022


                                                  Electronic Telegram No. 5133
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau at eps.harvard.edu (alternate cbat at iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


U SCORPII
[Editor's note:  this text replaces that on CBET 5131 (O'Meara date).]
     Further to CBET 5129, S. J. O'Meara (Maun, Botswana) writes that this
recurrent nova has faded to mag about 10.4 on June 9.986 UT, as estimated
from CMOS images obtained with a Canon 90D 33-Mpx APS-C DSLR camera (with
integrated RGBG filter + 200-mm lens), using an AAVSO comparison-star chart
for U Sco.  O'Meara adds that a visual observation on June 10.958 yields
magnitude 10.5.
    The following additional CCD magnitudes have been reported to the Bureau:
June 6.009 UT, [17 (E. Guido, A. Valvasori, and M. Rocchetto, from imaging
with a "Telescope Live" 70-cm telescope at Oria, Spain); 6.262, [17 (Guido et
al., from imaging with a "Telescope Live" telescope at El Sauce, Chile);
6.880, R_c = 8.26 (Guido et al., from imaging with a telescope at the ALMO
Observatory, Padulle, Italy); 7.094, V = 7.79 (F. Romanov, remotely with a
0.61-m f/6.5 Dall-Kirkham telescope at the Burke-Gaffney Observatory in
Canada); 7.098, B = 8.04 (Romanov); 7.101, R_c = 7.45 (Romanov); 7.102, I-C =
7.17 (Romanov); 7.206, V = 7.89 (Romanov; remotely using a 0.36-m f/6.2
Schmidt-Cassegrain telescope at the Abbey Ridge Observatory in Canada); 7.210,
B = 8.27 (Romanov); 7.215, R_c = 7.45, I_c = 7.09 (Romanov).  Romanov reports
magnitude 8.5 for U Sco from five 10-s stacked exposures taken around June
7.565 with a Canon EOS 60D camera (+ 72-mm-f.l. lens) at Yuzhno-Morskoy, near
Nakhodka, Russia.  W. Souza, Sao Paulo, Brazil, reports visual mag 8.1 for
U Sco on June 6.986 with 15x70 binoculars.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2022 CBAT
2022 June 11                     (CBET 5133)              Daniel W. E. Green



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