Query= GK PER GCVS Query forms

NNo GCVS J2000.0 Type Max Min I Min II Epoch(JD24..) Year Period M-m/D Spectrum References Other design.

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630193 |GK Per *|033112.0+435415 |NA+XP | 0.2 | 14.0 | |V |15439. |1901 | | |pec(NOVA) | 09515|

------------------------------------------------------------------------------------------------------------------------------------------------------------------ ______________The positional information: ___________________________

NNo GCVS J2000.0 p.m.(as/yr) Epoch Ident.

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630193 |GK Per |033112.01 +435415.4 | |1989.760| |GSC2.2

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_______________Cross-identifications:_______________

GK Per = AN 1901.0003 |

GK Per = BD +43 0740 |a

GK Per = GSC 2874.00922 |

GK Per = HD 021629 |

GK Per = X 03277+432 |

____________________________________________________ Reference to a chart or photograph:

09515. G.Williams, ApJ Suppl 53, 523, 1983.

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Remark:

    SB2 (sdBE + K2IVp).

    The following types of activity are being observed after

    the return to the normal brightness: rapid irregular

    variations (Delta(m) ~0.1m in several minutes); irregular

    fluctuations from night to night (Delta(m) up to 0.3m);

    slow irregular variations (Delta(m) = 1.5m in several

    dozen days); bursts with light increase in 10d - 30d and

    decrease in 10d - 40d, Delta(m) up to 3.5m, the mean

    interval between bursts being delta(t) = 820d [09686, 09788].

    According to [10198], the radial velocities are

    represented with the elements Max (Vr > 0) = 2444912.966 +

    1.996803d*E (Kabs = 124 km/s, Kem = 34 km/s). According

    to [10199], the 2d variation is modulated with a period

    of 0.131623d, Max (delta(Vr)) ~2443787.995 (Kabs =

    15 km/s, Kem = 20 km/s). During a burst the sinusoidal

    modulation of X-ray flux was recorded,

    Tmax = 24455555.67456 + 0.004066443d*E [09786].

    ExpAnding envelope (0.454"/yr, 1948 - 1964;

    0.432"/yr, 1964 - 1981, [09787]).

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