HKV8 = CzeV161 Lac : W UMa TYPE ECLIPSING BINARY
The new W UMa type eclipsing binary HKV8 Lac = CzeV161 Lac = VSX J222704.2+444559 = USNO-B1.0 1347-0483658 (R.A. = 22h 27m 04.28s, Decl. = +44o 45' 59.7",
equinox 2000.0, m = 14.84 - 15.38 R mag) has been found near variable star V430 Lac on 30th August 2008 by Martin Lehký at
Hradec Králové observatory (HPHK) using a 0.40-m f/5 JST reflector and SBIG ST-7 CCD camera.
Discovery has been preliminary published in the catalogue CzeV (# 161) - 31st August 2008
& in the International Variable Star Index (# VSX J222704.2+444559) - 21st December 2008.
Discovery has been published in the OEJV xxx - New Eclipsing Binary Star in Field of V430 Lac - xxth September 2009
20080830 R_190_90s (173) 2454709.48662 +/- 0.00038 (GEO) data Lehký (DISCOVERY)
20080909 R_355_90s (314) 2454719.27914 +/- 0.00046 (GEO) data Lehký
2454719.40795 +/- 0.00075 (GEO) Lehký
2454719.53232 +/- 0.00034 (GEO) Lehký
20081229 R_160_90s (141) 2454830.19743 +/- 0.00073 (GEO) data Lehký
2454830.32502 +/- 0.00052 (GEO) Lehký
20090823 R_280_90s (217) 2455067.34469 +/- 0.00040 (GEO) data Lehký
2455067.47250 +/- 0.00093 (GEO) Lehký
2455067.59905 +/- 0.00050 (GEO) Lehký
20090824 R_262_90s (201) 2455068.37697 +/- 0.00032 (GEO) data Lehký
2455068.50272 +/- 0.00040 (GEO) Lehký
20090831 R_185_90s (163) 2455075.33041 +/- 0.00047 (GEO) data Lehký
2455075.45952 +/- 0.00050 (GEO) Lehký
HJD Min I = 2455068.50598 +/- 0.00040 (P = 0.2576355 +/- 0.0000009 d) amplitude 0.54 mag
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30. VIII. 2008
09. IX. 2008
29. XII. 2008
23. VIII. 2009
24. VIII. 2009
31. VIII. 2009
Martin Lehký / makalaki@astro.sci.muni.cz / Hradec Králové / Czech Republic
Created 06th September 2009 / Update 06th September 2009