Pelageya Fedorovna Shajn

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Asteroids discovered: 19
1112 Polonia	August 15, 1928
1113 Katja	August 15, 1928
1120 Cannonia	September 11, 1928
1121 Natascha	September 11, 1928
1369 Ostanina	August 27, 1935
1387 Kama	August 27, 1935
1390 Abastumani	October 3, 1935
1475 Yalta	September 21, 1935
1610 Mirnaya	September 11, 1928
1648 Shajna	September 5, 1935
1654 Bojeva	October 8, 1931
1735 ITA	September 10, 1948
1954 Kukarkin	August 15, 1952
1987 Kaplan	September 11, 1952
2108 Otto Schmidt	October 4, 1948
2445 Blazhko	October 3, 1935
3080 Moisseiev	October 3, 1935
3958 Komendantov	October 10, 1953
5533 Bagrov	September 21, 1935

Pelageya Fedorovna Shajn née Sannikova (Пелагея Фёдоровна Шайн) (1894–August 27, 1956) was a Soviet/Russian astronomer. In modern English transliteration, her surname would be given as Shayn, but her astronomical discoveries are credited under the name P. F. Shajn. Nonetheless, her last name is sometimes given as Schajn, and her first name sometimes as Pelageja.

She was the wife of Grigory Abramovich Shajn (Григорий Абрамович Шайн), who was also a Russian astronomer. Her maiden name was Sannikova (Санникова).

She co-discovered the periodic comet 61P/Shajn-Schaldach. However, the non-periodic comet C/1925 F1 (Shajn-Comas Sola), also known as Comet 1925 VI or Comet 1925a, was co-discovered by her husband rather than by her.

She also discovered numerous asteroids and about 150 variable stars.