Variable Star RTLac

CROSS IDENTIFICATION: RT Lac

RT Lac = AN 1908.0013 = BD +43 4112 = HD 209318 = SAO 051563 

GCVS result

ID: 450012
Variable star: RT Lac
RA 2000: 220130.7
DE 2000: +435326
RA 1950:
DE 1950:
Type of variability: EB/AR/RS
Max (mag): 8.84
Min (mag): 9.89
Photometric system: V
Epoch (JD): 44873.3648
Period (d): 5.0739496
Year of outburst for N, SN:
M-m (or D):
Spectrum: G9IV+K1IV
Study reference: 09292
Chart or phot. ref.: 00010
Cases of non-existence:

GCVS NOTE result

Min II 9.62. P var. Min I = 2440382.9005 + 5.0740484d*E + "1.02d*10**(-8)*E**2 (JD2411650 - 42500) [08592] since JD2436470 - see Table. There is a square term in the elements given in the Table: -2.7d*10**(-8)*E**2. Shape of the light curve and depths of the Minima vary. According to [09293] the period of the distortion wave migration is ~9.5 yr, the period of the wave amplitude variations (0 < A <= 0.17m) is ~30 yr. According to [09292] the migration period is nearly half of the value given in [09293].

GCVS NOTES fulltext search:  

NSV: Suspected Variable NSV  not found.

BRKA result

Variable star: RT Lac
Brightness type: 09
Points: 9
RA 2000: 220130.4
DE 2000: +435324
Max (mag): 8.84
Min (mag): 9.89
Sec (mag): 9.62
Photometric system: V
Epoch (JD): 51545.484
Period (d): 5.0737875
D (hour): B
d (hour): -
Astrophysical note:
Reference: SAC 71
Finding chart: K

MEKA: Variable star RT Lac not found.

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.
Spaces and cases are ingnored..


 
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