RY Sgr

Alert Notice 233: Rare outburst of 0837+28 EG Cancri AND Request to monitor several R Coronae Borealis stars

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

AAVSO ALERT NOTICE 233 (December 2, 1996)

RARE OUTBURST OF 0837+28 EG CANCRI

Alert Notice 144: Supernova 1991X in NGC 4902 AND Monitoring of 1910-33 RY Sagittarii

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 144 (May 6, 1991)

SUPERNOVA 1991X IN NGC 4902

Alert Notice 138: Nova Herculis 1991 AND Special request to monitor R Coronae Borealis stars

THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
    25 Birch Street, Cambridge, MA 02138 USA
    BITNET: aavso@cfaB SPAN: nssdca::cfa8::aavso
     Tel.617-354-0484 FAX 617-354-0665

    AAVSO ALERT NOTICE 138 (March 25, 1991)

NOVA HERCULIS 1991

RY Sagittarii

Rebels With a Cause?

If there is a single word that one would use to describe the R Coronae Borealis (RCB) variable stars, it is enigmatic. This small, puzzling class of stars are most peculiar. With just under 50 known RCB stars, they appear to belong to an elite gang of rebellious variables. While we have been trained to think that activity of a star generally occurs as the star brightens, RCB stars prefer to do just the opposite.

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