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Investigations of a Variable Planetary Nebula, Three Periodic, and a New Suspected Variable in Sagittarius

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Pamela Robinson

Maria Mitchell Observatory, Nantucket, Massachusetts




Long-term and short-term variations, possibly periodic were observed in the planetary nebula, V3811 Sgr. Extensive observations of the RR Lyrae-type star, V509 SGR, and the two long-period variables, GP Sgr and V510 Sgr, indicated only minor revisions in period. A close companion to GO Sgr shows evidence of short-term variation altho


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