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Latest Details
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| Name |
RR Lyr |
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| AAVSO UID |
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| Constellation |
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| J2000.0 |
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| B1950.0 |
19 23 52.25 +42 41 11.6 |
| Proper motion |
| RA: -109.577 +/- 0.060 mas/y | Dec: -195.867 +/- 0.063 mas/y | Source: Gaia DR1 |
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| Galactic coord. |
74.952 +12.304 |
Other names
(Internal only)
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| Variability type |
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RRAB/BL |
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| Spectral type |
A5.0-F7.0 |
| Mag. range |
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7.17 - 8.14 V |
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| Discoverer |
-- |
| Epoch |
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| Outburst |
-- |
| Period |
0.566772 d (13.6025 h) |
| Rise/eclipse dur. |
16% (2.18 h) |
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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 |
Otero, Sebastian Alberto
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Phase shift around 2008-2009. Elements HJD 2459422.522 + 0.566772 x E are valid between 2012 and 2024. |
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2 |
Otero, Sebastian Alberto
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Period in the table (0.566782 d.) is valid for 2016-2018. |
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3 |
2013arXiv1307.5820N |
Blazhko period of 39.20 days from Kepler data. |
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4 |
GCVS Team |
mu alpha = -0.11", mu delta = -0.19". [Fe/H] = -1.14; Delta(S) = 6. Blazhko effect of variable amplitude (practically to complete disappearance of Blazhko effect); Pi = 40.8d. Variations of Max light phase up to 0.14P; magnitude in Max var in the range up to 0.6m, that in Min var in the range up to 0.1m [G.W.Preston, J.Smak, B.Paczynski, ApJ Suppl 12, N104, 1965.].According to [L.Detre, B.Szeidl, "Variable Stars in the Globular Clusters and Related Systems", IAU Coll N21, Toronto, P. 31, 1973.], a cycle ~4 yr is present in Blazhko effect amplitude changes; at the end of the cycle the Blazhko effect phase changes abruptly by 0.25Pi. Magnetic field strength varies with the pulsational period [Yu.S.Romanov, S.N.Udovichenko, Soobshch. Spets. Astrofiz. Obs. Issue 32, 15, 19]. P var. Max = 2414856.480 + 0.56682069d*E (JD2414800 - 18800); Max = 2421854.052 + 0.56685169d*E (JD2418800 - 26500) [J.Hellerich, AN 227, 133, 1926.]; Max = 2426571.3828 + 0.56684333d*E (JD2426500 - 32500) [Yu.S.Romanov, Yu.T.Fedotov, A.I. Movchan, Astron. Tsirk. N1205, 4, 1982.]; Max = 2438215.9492 + 0.566830d*E (JD2438000 - 41000) [SAC N39, 1968.]; Max = 2438215.9492 + 0.56683313d*E (JD2441000 - 42900) [Yu.S.Romanov, Yu.T.Fedotov, A.I. Movchan, Astron. Tsirk. N1205, 4, 1982.]; since JD2442900 - see Table. |
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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 |
McQuillan, A.; Mazeh, T.; Aigrain, S., 2014, Rotation Periods of 34,030
Kepler Main-sequence Stars: The Full Autocorrelation Sample |
2014ApJS..211...24M |
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J.M. Nemec, J.G. Cohen, V. Ripepi et al., 2013, arXiv:1307.5820
[astro-ph.SR] |
2013arXiv1307.5820N |
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Catalogue of Stellar Spectral Classifications (Skiff, 2009-2016) |
2002AJ....123..473B |
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Yu.S.Romanov, Yu.T.Fedotov, A.I. Movchan, Astron. Tsirk. N1205, 4, 1982. |
1982ATsir1205....4R |
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H.L.Giclas, R.Burnham, N.G.Thomas, Lowell Bull N120, 1963. |
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Kepler data (MAST) |
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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 = 6.95 | H = 6.69 | K = 6.65 | J - K = 0.30 |
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Images
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Supporting Documents
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Revision History
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