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Name
  KOI-3818  
AAVSO UID
000-BLT-899 (No observations)  
Constellation
Lyra Sequence
J2000.0
19 18 57.40 +41 57 54.9  (289.73917 +41.96525) Search nearby
B1950.0 19 17 20.24 +41 52 20.1
Proper motion
RA: -5.454 +/- 2.254 mas/yDec: -6.468 +/- 1.672 mas/ySource: Gaia DR1
Galactic coord. 73.667 +13.040
Other names

(Internal only)
2MASS J19185739+4157549 GSC 03129-00304 KIC 6515722
TYC 3129-304-1 UCAC4 660-072016  
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Variability type
EA/EL
Spectral type dA+WD
Mag. range
11.61 V (0.003)Kp
Discoverer --
Epoch
14 May 2011 (HJD 2455695.737) Ephemeris
Outburst --
Period 3.8170428 d
Rise/eclipse dur. 5%  (4.580 h)
Remarks
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1 Hinzel, David H. Primary rotation period = 0.79 d. Secondary eclipse deeper than primary eclipse (after removing variability caused by beaming, ellipsoidal, and reflection effects). The system has a fast rotating primary and small but significant orbital eccentricity. Displays high frequency modulations between 0.118 and 0.478 d.
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References
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1 J. van Roestel, T. Kupfer, R. Ruiz-Carmona, et al., Discovery of 36
eclipsing EL CVn binaries found by the Palomar Transient Factory		 2017arXiv171206507V
2 Faigler, S.; et al., 2015, BEER analysis of Kepler and CoRoT light curves:
IV. Discovery of four new low-mass white-dwarf companions in the Kepler
data		 2015arXiv151005465F
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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 = 11.32H = 11.32K = 11.31J - K = 0.01
AllWISE W1 = 11.28W2 = 11.31W3 = 11.29W1 - W2 = -0.03
APASS-DR9 B = 11.57V = 11.61g' = 11.45r' = 11.61i' = 11.71B - V = -0.03
Images
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Supporting Documents
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Revision History
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2 Admin, VSX 2017-12-25 17:07 UTC Subtype from [2017arXiv171206507V].
1 Hinzel, David H. 2015-12-15 04:08 UTC Initial submission. Variable type, spectral type, period, epoch, amplitude, eclipse duration from 2015arXiv151005465F. Vmag from APASS. UCAC4 position.

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