This bright nova, discovered on December 7.47 UT by Syuichi Nakano of Japan at photographic magnitude 6.5 (see AAVSO Notice 179), has been very well monitored by observers worldwide. Its optical light curve, created from observations reported to the AAVSO, indicates it brightened to about visual magnitude 5.7 by mid·Oecember, and then has slowly declined to magnitude 8.4 by February 7, with fluctuations as much as 1 magnitude in amplitude.
May 22, 2010: Rod Stubbings has reported that the infrequently outbursting dwarf nova EX Hydrae is in outburst. Stubbings reported the star at a visual magnitude of 9.4 on 2010 May 22.667 (JD 2455339.167) and it remained at 9.4 through May 22.721 (2455339.221). Both visual and instrumental observations of EX Hya are urgently requested. CCD observers, please obtain time-series photometry if at all possible. Please follow this outburst through its completion; EX Hya is known to have short outbursts, so this outburst may be very brief.
THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
BITNET: aavso@cfa SPAN: cfa::aavso
INTERNET: aavso@cfa.harvard.edu
Tel. 617-354-0484 FAX 617-354-0665
AAVSO ALERT NOTICE 184 (May 17, 1994)
BRIGHTENING OF 1137+72 YY DRACONIS (= DO DRACONIS)
THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
BITNET: aavso@cfa SPAN: cfa::aavso
INTERNET: aavso@cfa.harvard.edu
Tel. 617-354-0484 FAX 617-354-0665
THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
INTERNET: aavso@aavso.org
Tel. 617-354-0484 Fax 617-354-0665
THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
BITNET: aavso@cfa8 SPAN: nssdca::cfa8::aavso
Tel. 617-354-0484 FAX 617-354-0665
AAVSO ALERT NOTICE 146 (July 19,1991)
SPECIAL MULTIWAVELENGTH MONITORING OF 0201+14 TT ARIETIS
Kunegunda Belle, Don Hoard and Steve Howell are observing two cataclysmic variables with Spitzer during the next couple of weeks. They request ground-based light curves spanning the observation intervals so that they can identify the state each variable is in during the Spitzer visits.
1. EX HYA (12:52:24.20, -29:14:56.0, AUID 000-BBT-323)
The observations for EX Hya are scheduled for:
2009-08-18 19:25:01.1 UT 3.6micron single exposure
2009-08-18 19:26:52.9 UT 4.5micron light curve
