Maria Mitchell Observatory,
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