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Latest Details
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| Name |
EM Cyg |
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| AAVSO UID |
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| Constellation |
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| J2000.0 |
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| B1950.0 |
19 36 42.17 +30 23 34.0 |
| Proper motion |
| RA: -4.2 +/- 2.9 mas/y | Dec: 0.2 +/- 2.9 mas/y | Source: UCAC4 |
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| Galactic coord. |
65.187 +4.277 |
Other names
(Internal only)
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Please note that aliases shown in grey link to obsolete records.
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1RXS J193840.0+303035 |
AAVSO 1934+30 |
AN 185.1928 |
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Downes EM Cyg |
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(Not logged in) Add name
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| Variability type |
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UGZ+E |
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| Spectral type |
pec(UG) |
| Mag. range |
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11.9 - 14.4 p |
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| Discoverer |
-- |
| Epoch |
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| Outburst |
-- |
| Period |
0.29090913 d (6.981819 h) |
| Rise/eclipse dur. |
-- |
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Remarks
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Some references may be clicked to view in new window. Roll over index number to view submission details.
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1 |
GCVS Team |
Mean cycle varies in the range 19d - 33d [A.A.Wachmann, Bergd Abh 6, N1, 1961., R.A.Brady, T.J.Herczeg, PASP 89, 71, 1977.]. Depth of eclipses 0.25m V; elements of eclipsing system light variations: Min = 2437882.8595 + 0.29090950d*E - 21d*10**(-12)*E**2 [G.S.Mumford, AJ 85, 748, 1980.]. Sometimes there are light oscillations with periods 14.6s - 21.2s and an amplitude up to 0.4% [J.Patterson, ApJ Suppl 45, 517, 1981., R.H.Hildebrand, R.F.Stiening, E.J.Spillar, BAAS 14, 110, 1982.]. |
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References
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Click reference title/citation to view in new window. Roll over index number to view submission details.
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1 |
Bob Nelson's O-C files, 2016 |
-- |
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2 |
R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) |
2005JAD....11....2D |
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3 |
J.M. Kreiner, 2004, Acta Astronomica 54, 207 |
2004AcA....54..207K |
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R.A. Downes et al., 2001, PASP 113, 764 |
2001PASP..113..764D |
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A.A.Wachmann, Bergd Abh 6, N1, 1961. |
1961AAHam...6....1W |
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External Links
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Location
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Catalog Data
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Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
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2MASS
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J = 11.73 | H = 11.33 | K = 11.15 | J - K = 0.58 |
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AllWISE
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W1 = 11.09 | W2 = 11.09 | W3 = 11.04 | W1 - W2 = -0.01 |
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APASS-DR9
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B = 14.16 | V = 13.50 | g' = 13.78 | r' = 13.25 | i' = 12.93 | B - V = 0.65 |
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Images
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Supporting Documents
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Campaigns/Programs
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Z CamPaign
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Legacy CVs
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Revision History
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Currently approved revision is checked. Click revision number to view details of that revision.
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