Electronic Telegram No. 5013
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


RS OPHIUCHI
     K. Geary, Killann, Shercock, County Cavan, Ireland, reports an outburst
of what appears to be the recurrent nova RS Oph on Aug. 8.93 UT at visual
magnitude 6.0.  An apparent independent detection of the outburst was reported
by A. Amorim, Florianopolis, Brazil, who provides his visual magnitude
estimates:  Aug. 8.91, 5.0 (10x50 binoculars); 8.95, 5.0 (naked eye).  Amorim
posted a photo that he took on Aug. 8.916 with a Canon 1100D camera (+ 55-mm-
f.l. lens) at URL http://www.geocities.ws/costeira1/img/20210808_2159ut.jpg.
The AAVSO website gives the previous known observation at visual mag 11.2
on Aug. 7.969, with the last "regular" outburst being near mag 8.5 in May
2020.  The last large outburst of RS Oph occurred in Feb. 2006, when it
reached visual mag 4.5 (cf. IAUC 8671).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2021 CBAT
2021 August 9                    (CBET 5013)              Daniel W. E. Green