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Name
  alf Cas  
AAVSO UID
000-BBB-937 (13261 observations)  
Constellation
Cassiopeia Sequence
J2000.0
00 40 30.45 +56 32 14.5  (10.12688 +56.53736) Search nearby
B1950.0 00 37 39.35 +56 15 48.4
Proper motion
RA: 50.88 +/- 0.11 mas/yDec: -32.13 +/- 0.10 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 121.416 -6.302
Other names

(Internal only)
18 Cas AAVSO 0034+55 ADS 561 A
BD+55 139 HD 3712 HIP 3179
HR 168 IRC +60017 RAFGL 100
SAO 21609 X 00376+562  
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Variability type
ROT:
Spectral type K0IIIa
Mag. range
2.23 V (0.001)TESS
Discoverer William Birt (1831)
Epoch
19 Oct 2019 (HJD 2458775.66) Ephemeris
Outburst --
Period 2.4124 d
Rise/eclipse dur. --
Remarks
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1 Mishevskiy, Nikolay J-K= 0.61, B-V= 1.17.
2 GCVS Team VB A (B 14.5m, 17.6", 272deg; C 13.5m, 38", 105deg; D 8.5m, 64.4", 280deg.)
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References
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1 Ricker, G. R.; et al., 2014, Transiting Exoplanet Survey Satellite (TESS) 2014SPIE.9143E..20R
2 S.J. George, I.R. Stevens, S.A. Spreckley, 2009, arXiv:0905.4223v1
[astro-ph.SR]
2009arXiv0905.4223G
3 Cannon, A. J., 1907, Second catalogue of variable stars 1907AnHar..55....1C
External Links
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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 = 0.31H = -0.21K = -0.30J - K = 0.61
AllWISE W3 = -0.21W4 = -0.34W3 - W4 = 0.12
Images
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Supporting Documents
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2 Phase plot P= 2.41 d Mishevskiy, Nikolay 2020-02-20 04:43 UTC
1 Light curve TESS Mishevskiy, Nikolay 2020-02-20 04:42 UTC
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Revision History
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5 Fernig, Leo 2022-02-18 22:10 UTC Discoverer updated from 1907AnHar..55....1C page 7
4 Mishevskiy, Nikolay 2020-01-31 05:58 UTC Period, epoch, type and amplitude of variability from TESS data. Mean magnitude from GCPD.
3 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2009-05-30 01:36 UTC Update from [2009arXiv0905.4223G].
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.