2004IAUC.8374....3P

A. Price, AAVSO, reports on observations of the unusual variable noted on IAUC 8363 and 8369. A companion star < 1" away complicates measurements of its brightness; the two objects together were measured at V = 16 on July 16.217 UT, according to R. James, Las Cruces, NM. Further astrometry by A. Henden (1.0-m U.S. Naval Observatory telescope) gives the new variable's position as R.A. = 18h39m26s.154, Decl. = +26o04'09".89 (equinox 2000.0; ± 0".018); this is 1" north of its nearby companion, which has position end figures 26s.195, 09".07 (identical within the errors to that of 2MASS 18392619+2604087 – itself having position end figures 26s.19, 08".8; ± 0".06). A steady period of 0.0577 ± 0.0001 day exists during the outburst and decline. A search by Price and M. Templeton of 164 Harvard College Observatory plates taken from 1929 to 1950 reveals four previous outbursts on 1932 Apr. 21 (to blue mag about 10.4), 1934 Oct. 17 (to mag about 12.2), 1939 Aug. 16 (to mag about 14.2, and 1941 Aug. 2 (to mag about 10.6). Also, a nearby star (position end figures 27s.37, 06'15".3) brightened by about 0.2 mag/day from 2004 June 30.17 to July 9.24, when it was at V about 14.