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Name
  TU Cas  
AAVSO UID
000-BBB-663 (26825 observations)  
Constellation
Cassiopeia Sequence
J2000.0
00 26 19.45 +51 16 49.3  (6.58104 +51.28036) Search nearby
B1950.0 00 23 36.70 +51 00 13.2
Proper motion
RA: 1.589 +/- 0.066 mas/yDec: -4.018 +/- 0.067 mas/ySource: Gaia DR1
Galactic coord. 118.930 -11.396
Other names

(Internal only)
AAVSO 0020+50 AN 17.1911 ASASSN-V J002619.49+511649.1
BD+50 72 HD 2207 HIP 2085
HV 3307 SAO 21398  
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Variability type
DCEP(B)
Spectral type F3II-F5II
Mag. range
6.88 - 8.18 V
Discoverer Annie J. Cannon (1911)
Epoch
22 Jan 1973 (HJD 2441704.839) Ephemeris
Outburst --
Period 2.139298 d
Rise/eclipse dur. 31%  (15.92 h)
Remarks
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1 GCVS Team Fundamental mode period P0 is given in the Table; the corresponding amplitude is 0.69m. First-overtone period P1 = 1.51830d; the corresponding mean amplitude decreased from 0.4m to 0.25m during 67 years [S.W.Hodson, R.F.Stellingwerf, A.N.Cox, ApJ 229, 642, 1979.]. P1/P0 = 0.71. M - m var (0.17P <= M - m <= 0.35P).
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References
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1 E.Illes, L.Szabados, IAU Coll N29, 165, 1976. 1976mpvs.conf..165I
2 Dunér, N. C.; Hartwig, E.; Muller, G., 1911, Benennung von neu entdeckten
veränderlichen Sternen		 1911AN....190...57.
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = 6.68H = 6.44K = 6.33J - K = 0.35
AllWISE W1 = 6.19W2 = 6.11W3 = 6.18W4 = 6.09W1 - W2 = 0.09W3 - W4 = 0.09
APASS-DR9
Images
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Supporting Documents
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Revision History
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3 Fernig, Leo 2022-11-15 22:31 UTC Discoverer updated from 1911AN....190...57. page 62.
2 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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