StarChile 2010   :   CCD observations of variable star ATACAMA4 Vel


The new W UMa (EW) type eclipsing binary ATACAMA4 Vel = CzeV206 Vel = VSX J081052.6-485021 = USNO-B1.0 0411-0100738 (R.A. = 08h 10m 52.687s, Decl. = -48° 50' 21.39", equinox 2000.0, m = 13.3 - 14.0 V mag) has been found near variable star AO Vel on 13th April 2010 by Martin Lehký and Dalibor Hanžl at Space Atacama Lodge near San Pedro de Atacama, Chile (68° 10' 48.7" W and 22° 57' 09.8" S) using a 0.20-m f/4 reflector and SBIG ST-8 CCD camera with BVRI filters (field of view 59' x 39' and 2.3" x 2.3" / 1 px).

Comparison stars were cmp USNO-B1.0 0412-0103837 ( R.A. = 08h 13m 32.344s, Decl. = -48° 47' 04.08", J2000.0, R2mag = 9.66), ch1 USNO-B1.0 0413-0101990 ( R.A. = 08h 11m 24.789s, Decl. = -48° 38' 43.92", J2000.0, R2mag = 9.68) and ch2 USNO-B1.0 0413-0101892 ( R.A. = 08h 11m 18.215s, Decl. = -48° 39' 44.00", J2000.0, R2mag = 10.22).


ATACAMA4 Vel / 3 nights / 14.1 hours / VRI / 2 minima timings (3)

HJD Min I = 2455303.650 +/- 0.005   /   P = 0.403177 +/- 0.000053 d   /   amplitude 0.69 mag


Discovery has been preliminary published in the catalogue CzeV (# 206) - 24th July 2010 & in the International Variable Star Index (# VSX J081052.6-485021) - 24th July 2010.
The times of minima will be publish in the database of Variable Star and Exoplanet Section of Czech Astronomical Society.






ATACAMA4_AOVel




20100413-20100416 (time span: 3.2 days; data points: 160)

ATACAMA4Vel_20100413-20100416_V_LEH_phased_HJD



13. IV. 2010

ATACAMA4Vel_20100413_VRI_LEH_lightcurve



15. IV. 2010

ATACAMA4Vel_20100415_VI_LEH_lightcurve



16. IV. 2010

ATACAMA4Vel_20100416_VRI_LEH_lightcurve





Martin Lehký / makalaki@astro.sci.muni.cz / Hradec Králové / Czech Republic   &   Dalibor Hanžl / Brno / Czech Republic
created 24th July 2010 / update 07th October 2012