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Astronomical Topics

Nature volume 131, page 590 (22 April 1933) | Download Citation



Nova of March 20. A preliminary announcement of the discovery of this nova appeared in NATTURE of April 15, p. 553. Dr. Kukarkin, of Moscow, states in U.A.I. Circ. 434 that he has found three images of this star on old Moscow plates; on 1899 March 14 its magnitude was 14.1; on 1900 March 21 it was 13.8; on 1907 February 13 it was 13.0. Plates taken on the following dates failed to show the star (the figures in brackets after the dates show the limiting magnitudes of the plates): 1901 April 9 (14.5); 1903 April 16 (13.5); 1905 March 1 (14.1); 1905 March 27 (13.5); 1905 April 8 (14.8); 1907 April 5 (13.9); 1908 January 3 (16.0); 1908 March 29 (14.8); 1910 March 1 (14.5); 1911 February 21 (14.8). Dr. Kukarkin suggests that it is a variable star of the U Geminorum type; it may have a period of about a year, but there must be some irregularity in it. The decline must be very rapid; Dr. Delporte notes in U.A.I. Circ. 434 that plates taken on March 25 and 29 go down to mag. 17.5, but there is no trace of the nova.

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