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Name
  DF Cyg  
AAVSO UID
000-BCJ-079 (8964 observations)  
Constellation
Cygnus Sequence
J2000.0
19 48 53.90 +43 02 15.0  (297.22458 +43.03750) Search nearby
B1950.0 19 47 15.63 +42 54 39.7
Galactic coord. 77.195 +8.616
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
2MASS J19485394+4302145 AAVSO 1945+42 ASAS J194854+4302.2
GSC 03144-00794 HV 4002 IRAS 19472+4254
KID 7466053 NSVS 5692115 TYC 3144-794-1
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Variability type
RVB
Spectral type G5-K4I-II
Mag. range
10.8 - 15.2 p
Discoverer --
Epoch
26 Jul 1974 (HJD 2442255) Ephemeris
Outburst --
Period 49.808 d
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto J-K= 1.10.
2 GCVS Team P var [G.T.Koval', Odessa Izv. 3, 313, 1953., G.E.Erleksova, Perem. Zvezdy 18, 53, 1971.]. Mean brightness varies: Min = 2411292 + 780.2d*E [V.P.Zessewitsch, Odessa Izv. 3, 293, 1953.].
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References
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1 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)		 2012arXiv1210.0821A
2 A. Pigulski, G. Pojmanski, B. Pilecki, D. Szczygiel, 2008,
arXiv:0808.2558v2 [astro-ph]		 2008arXiv0808.2558P
3 A. Pigulski, G. Pojmanski, B. Pilecki, D. Szczygiel, 2008,
arXiv:0808.2558v2 (online data)		 2008arXiv0808.2558P
4 Northern Sky Variability Survey, Wozniak, P.R., et al., 2004 2004AJ....127.2436W
5 S.Gaposchkin, HA 108, N1, 1939. 1939AnHar.108....1G
6 M.Harwood, HA105, 521, 1937. 1937AnHar.105..521H
External Links
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Supporting Documents
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1 Phase plots Otero, Sebastian Alberto 2012-07-25 01:54 UTC Phase plots for the short and long periods using AAVSO, ASAS-3 and NSVS data.
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
3 Otero, Sebastian Alberto 2012-07-25 01:54 UTC Period, epoch and range from AAVSO, NSVS and ASAS-3 data.
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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