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HR 1170, also known as HD 23728 and V376 Persei, is a star about 220 light years from the Earth, in the constellation Perseus.[1] It is a 5th magnitude star, so it will be faintly visible to the naked eye of an observer far from city lights. It is a variable star, whose brightness varies slightly from magnitude 5.77 to 5.91.[2]
Michel Breger announced that HR 1170 is a Delta Scuti variable star in 1969, based on observations taken over 6 hours and 10 minutes on October 13, 1967. He reported that it varied with a mean amplitude of 0.08 magnitudes, over a period of 2.2 hours.[11] In 1970 it was given the variable star designation V376 Persei.[12]
Early investigations of HR 1170 showed that it has more than one pulsation period,[13] as is true for most Delta Scuti stars,[14] and the light curve shows the different periods beating with each other. Many investigators have tried to determine the modes of oscillation present in this star.[15][16][17][18][19][20][21] All but one[19] of these studies find only two significant periods. All agree that one of the periods is approximately 2.386 hours, but the studies do not agree on the second period.[21] There is also no agreement as to whether the pulsations are radial, nonradial or a combination of the two, though most of the later studies, which examine data taken over a longer time window, conclude that at least one of the pulsation modes is nonradial.
This page was last edited on 13 August 2023, at 14:13