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eclipsing variable




Special Notice #192: Update on the epsilon Aurigae eclipse

February 3, 2010: Epsilon Aurigae continues to progress through its first eclipse since 1982-84. Visual and photometric observation means place it at around magnitude 3.7-3.8. Totality was likely reached sometime in January, but it will take some time to analyze the data to establish a specific date. Totality is expected to last about 15 months, but the system is not expected to remain quiet during this time. Small amplitude modulations are being detected which are likely not associated with the eclipse itself. However, their exact source is still debated.

Alert Notice 228: Request to monitor 1804+67 HS 1804+6753 for observations with Hubble Space Telescope

25 Birch Street, Cambridge, MA 02138 USA

AAVSO ALERT NOTICE 228 (September 6, 1996)


Alert Notice 351: Campaign for a New Eclipsing Cepheid

June 8, 2007

TYC 1031 01262 1
ASAS 182611+1212.6
1821+12B (Harvard Designation)
ASAS182612 (AAVSO name)

Discovered by:
Pojmanski, G., Pilecki, B., Szczygiel, D. 2005, AcA 55, 275
Antipin, S.V., Sokolovsky, K. V. and Ignatieva, T. I. 2007, astro-ph/0705.0605

Position (from Sonoita Research Observatory, UCAC2):
18:26:11.50 +12:12:35.0 (+/- 100mas)

Alert Notice 401: Monitoring of EX Hya and DQ Her

August 13, 2009



The observations for EX Hya are scheduled for:


Special Notice #219: Eclipse of the symbiotic star CI Cygni


How to Use the EB Ephemeris


Variable Star of the Season Archive


Variable Stars and the Stories they Tell

What are variable stars and why are astronomers interested in them?
