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Details for Revision 3
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Name
  MZ Cyg  
AAVSO UID
000-BDN-379 (1978 observations)  
Constellation
Cygnus Sequence
J2000.0
21 21 54.73 +37 27 33.1  (320.47804 +37.45919) Search nearby
B1950.0 21 19 53.63 +37 14 42.8
Galactic coord. 83.413 -8.853
Other names

(Internal only)
1SWASP J212154.71+372732.9 2MASS J21215472+3727330 AN 89.1931
GSC 02715-02269 HIP 105485 IOMC 2715000079
NSVS 5902226 NSVS 8683225 NSVS 8704961
TYC 2715-2269-1    
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Variability type
RVA
Spectral type F5-G5e:
Mag. range
10.76 - 12.68 V
Discoverer --
Epoch
--
Outburst --
Period 42.63 d
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto Period changes. From 1989 to 2004 the period remained stable at 42.82 d. then there was a period increase. APASS data from 2012 and SuperWASP data from 2006-2007 indicate a period of 42.9 d.
2 GCVS Team P var. Max = 2427641.914 + 21.162460d*E + 0.10575d*10**(-3)*E**2 (JD2414900 - 37900) [V.M.Grigorevskij, Perem. Zvezdy 15, N3, 321, 1964.]; since JD2443600 - see Table. Probably it is an RV Tau type variable, and then the period should be doubled [G.E.Erleksova, IBVS N1663, 1979.]. [A/H] = 0.1.
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References
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1 Henden, A. A.; et al., 2012, Data Release 3 of the AAVSO All-Sky
Photometric Survey (APASS)
2012JAVSO..40..430H
2 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)
2012arXiv1210.0821A
3 Catalogue of Stellar Spectral Classifications (Skiff, 2010) 2010yCat....102023S
4 Catalogue of Stellar Spectral Classifications (Skiff, 2010) 2010yCat....102023S
5 T.S.Meshkova, Perem. Zvezdy 5, 271, 1940. --
6 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.
--
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Supporting Documents
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1 Phase plot Otero, Sebastian Alberto 2015-10-02 02:09 UTC Phase plot with NSVS, HIPPARCOS, Berdnikov, SuperWASP, APASS and INTEGRAL-OMC data.
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
4 Otero, Sebastian Alberto 2015-10-02 02:09 UTC Period, epoch and range from NSVS, HIPPARCOS, Berdnikov, SuperWASP, APASS and INTEGRAL-OMC data. HIPPARCOS position.
3 Otero, Sebastian Alberto 2011-08-28 03:04 UTC Type from IBVS 1663. Spectral type from Skiff (2010).
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.