Variable Star GK Per

CROSS IDENTIFICATION: GK Per

GK Per = AN 1901.0003 = BD +43 0740a = HD 021629 

GCVS result

ID: 630193
Variable star: GK Per
RA 2000: 033112.0
DE 2000: +435415
RA 1950:
DE 1950:
Type of variability: NA+XP
Max (mag): 0.2
Min (mag): 14.0
Photometric system: V
Epoch (JD): 15439.
Period (d):
Year of outburst for N, SN: 1901
M-m (or D):
Spectrum: pec(NOVA)
Study reference:
Chart or phot. ref.: 09515
Cases of non-existence:

GCVS NOTE result

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) "fluctuations from night to night (Delta(m) up to 0.3m) slow irregular variations (Delta(m) = 1.5m in several "dozen days) 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])."

GCVS NOTES fulltext search:  

NSV: Suspected Variable NSV  not found.

BRKA: Variable star GK Per not found.

MEKA result

Variable star: GK Per
Type of variability: NR
Points: 2
Max (mag): 9,9
Min (mag): 13,5
Photometric system: V
Period (d):
Spectrum:
B-V:
Finding chart: ID: 093, M II

DSS plate 15'x 15'

Image from the Digitized Sky Survey at the STScI Archive.

 

Please put the variable's designation into field in common style - for example: ZUMa, zuma, V477Cyg, v1182Cyg, NSV 255, nsv2544. Designation of bright variable stars like Beta Persei type in short style (three letters) - bet Per. The complete cross-identification among more then 30 catalogues will be done after submitting.
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