Beta Pegasi is a semi-regular variable with a period of 43.3 days and a brightness that varies from magnitude +2.31 to +2.74 ( averaging 2.42 ) .
PROPN PROPN AUX DET ADJ NOUN ADP DET NOUN ADP NUM NOUN CCONJ DET NOUN DET VERB ADP NOUN NOUN ADP PROPN ( VERB NUM ) .