THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS 25 Birch Street, Cambridge, MA 02138 USA Tel. 617-354-0484 Fax 617-354-0665 INTERNET: aavso@aavso.org * * * AAVSO NEWS FLASH * * * Subject: 0120+31 TY PSC 0855+18 SY CNC No. 375 0207-63 WX HYI 2023+43 V503 CYG December 15, 1998 0324+58 AF CAM 2043+41 V516 CYG 0547-05 CN ORI 2335+12 HX PEG ---------------------------------------------------------------------------- 0120+31 TY PISCIUM The dwarf nova type (SU UMA subclass) cataclysmic variable TY PSC is undergoing an outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 10.0 <14.0 CGF DEC 12.1271 12.9 MKJ DEC 11.9757 13.5 DPL DEC 12.1389 13.0 SWT DEC 12.013 13.7 CGF DEC 13.017 12.4 CGF DEC 12.0181 13.4 BRJ DEC 13.82 13.3 VET DEC 12.11 12.6 DGP DEC 13.970 13.9 CGF ---------------------------------------------------------------------------- 0207-63 WX HYDRI The dwarf nova type (SU UMA subclass) cataclysmic variable WX HYI is undergoing an outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 10.4806 14.5 SRX DEC 11.4868 12.2 WPX DEC 10.78 <13.7 MLF DEC 11.6014 12.4 SRX DEC 11.4660 12.8 SRX DEC 12.951 13.2 MLF ---------------------------------------------------------------------------- 0324+58 AF CAMELOPARDALIS The dwarf nova type cataclysmic variable AF CAM is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 10.1000 <15.1 HSG DEC 13.029 13.7 CGF DEC 11.4535 13.3 HSG DEC 13.84 14.0 VET DEC 11.9847 13.1 SWT DEC 14.8 13.8 VET DEC 12.0257 13.7 BRJ DEC 15.0188 13.3 BRJ DEC 12.030 13.7 CGF DEC 15.1049 13.2 HSG ---------------------------------------------------------------------------- 0547-05 CN ORIONIS The dwarf nova type (Z CAM subclass) cataclysmic variable CN ORI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 10.5806 14.6 SRX DEC 12.1681 13.9 MKJ DEC 11.4444 14.4: HSG DEC 13.3111 13.0 RR DEC 11.49 <14.0 WPX DEC 14.3139 13.0 RR ---------------------------------------------------------------------------- 0855+18 SY CANCRI The dwarf nova type (Z CAM subclass) cataclysmic variable SY CNC appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 11.4611 13.6 HSG DEC 15.3215 12.5 SQN DEC 12.01 <12.7 GRL ---------------------------------------------------------------------------- 2023+43 V503 CYGNI The dwarf nova type (SU UMA subclass) cataclysmic variable V503 CYG appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 09.0861 <15.2 HSG DEC 12.996 14.4 CGF DEC 10.0854 <15.0 HSG DEC 13.951 14.4 CGF DEC 12.0 <14.6 CGF ---------------------------------------------------------------------------- 2043+41 V516 CYGNI The dwarf nova type (SS CYG subclass) cataclysmic variable V516 CYG is undergoing an outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 10.0861 <15.5 HSG DEC 12.993 14.0 CGF DEC 11.968 14.2 CGF DEC 13.963 14.1 CGF DEC 11.9743 13.4 SWT DEC 14.9965 14.3 BRJ DEC 12.0104 13.9 BRJ DEC 15.0903 14.8 HSG ---------------------------------------------------------------------------- 2335+12 HX PEGASI The dwarf nova type cataclysmic variable HX PEG is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 25.941 15.1 PYG DEC 11.976 12.8 CGF NOV 26.87 <13.9 KTO DEC 12.0063 13.3 BRJ NOV 28.782 <14.1 PYG DEC 12.950 12.3 CGF DEC 08.4646 <13.0 SRX DEC 13.969 12.3 CGF DEC 09.995 13.7 CGF DEC 14.9931 13.0 BRJ DEC 10.4646 12.8: SRX DEC 15.2681 12.3 SQN DEC 11.4681 12.5: SRX ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. BORTLE, USA MLF - L. MONARD, SOUTH AFRICA CGF - G. CHAPLE, USA RR - R. ROYER, USA DGP - G. DYCK, USA SQN - L. SHAW, USA DPL - P. DOMBROWSKI, USA SRX - R. STUBBINGS, AUSTRALIA GRL - B. GRANSLO, NORWAY SWT - R. STEWART, USA HSG - G. HANSON, USA VET - M. VERDENET, FRANCE MKJ - J. MCKENNA, USA WPX - P. WILLIAMS, NEW ZEALAND Please monitor these and other variable stars closely and phone-in, fax, or e-mail your observations to the AAVSO. Good observing! Janet A. Mattei, Director Rebecca Pellock, Technical Assistant ____________________________________________________________________________ Symbols may include: < = fainter than magnitude given (variable not seen) : = uncertain CCDV = Charge-coupled device with (V) filter If you would like to contribute to AAVSO NEWS FLASH, please send observations of unusual variable star activity to: observations@aavso.org Those who wish to subscribe (free of charge) or unsubscribe to NEWS FLASH may do so by sending a message to: observations@aavso.org If you would like data from the AAVSO International Database for research purposes, please send your request to: Janet Mattei, AAVSO Director, at aavso@aavso.org We look forward to including your observations in future editions of AAVSO NEWS FLASH! ____________________________________________________________________________