NNo GCVS J2000.0 Type Max Min I Min II Epoch Year Period M-m/D Spectrum References Other desig. p.m.(as/yr) Epoch Ident. New type GCVS
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450012 |RT Lac *|220130.74 +435325.6 |EB/AR/RS | 8.84 | 9.89 | 9.62 |V |44873.3648 | | 5.0739496 | |G9IV+K1IV |09292 00010| |+0.057 +0.021|2000.0 | |Hip | |RT Lac |
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_______________Cross-identifications:_______________
RT Lac = AN 1908.0013 |
RT Lac = BD +43 4112 |
RT Lac = GSC 3210.01930 |
RT Lac = HD 209318 |
RT Lac = Hip 108728 |
RT Lac = SAO 051563 |
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Reference to a chart or photograph:
00010. F.W.Wright, HA 89, N10, 1937.
Reference to a study of the star:
09292. Z. Tunca, C.Ibanoglu, O.Tuemer, A.Y. Ertan, S.Evren, ApSS 93, N2, 431, 1983 {1983ApSS..93..431T}
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Remark:
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].
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