[vsnet-ecl 7410] V5643 Sgr observations by K.Nagai (6/Apr/2020)

[K.Nagai]

object          YYMMDD(UT)        mag      code
SGRV5643        20200406.77766    10.620U  Nga.VSOLJ
SGRV5643        20200406.77980    10.305U  Nga.VSOLJ
SGRV5643        20200406.78194    10.264U  Nga.VSOLJ
SGRV5643        20200406.78410    10.407U  Nga.VSOLJ
SGRV5643        20200406.79480    10.306U  Nga.VSOLJ
SGRV5643        20200406.79696    10.097U  Nga.VSOLJ
SGRV5643        20200406.79910    10.224U  Nga.VSOLJ
SGRV5643        20200406.80553    10.186U  Nga.VSOLJ
SGRV5643        20200406.72685    9.967B  Nga.VSOLJ
SGRV5643        20200406.77831    9.975B  Nga.VSOLJ
SGRV5643        20200406.78260    9.888B  Nga.VSOLJ
SGRV5643        20200406.79546    9.942B  Nga.VSOLJ
SGRV5643        20200406.79762    9.736B  Nga.VSOLJ
SGRV5643        20200406.81475    9.632B  Nga.VSOLJ
SGRV5643        20200406.81690    9.522B  Nga.VSOLJ
SGRV5643        20200406.72731    9.579V  Nga.VSOLJ
SGRV5643        20200406.77878    9.594V  Nga.VSOLJ
SGRV5643        20200406.79378    9.134V  Nga.VSOLJ
SGRV5643        20200406.79593    8.988V  Nga.VSOLJ
SGRV5643        20200406.79808    9.060V  Nga.VSOLJ
SGRV5643        20200406.81522    8.686V  Nga.VSOLJ
SGRV5643        20200406.72131    8.936Ic  Nga.VSOLJ
SGRV5643        20200406.72345    9.055Ic  Nga.VSOLJ
SGRV5643        20200406.72558    9.075Ic  Nga.VSOLJ
SGRV5643        20200406.72772    9.220Ic  Nga.VSOLJ
SGRV5643        20200406.77061    9.346Ic  Nga.VSOLJ
SGRV5643        20200406.77919    9.243Ic  Nga.VSOLJ
SGRV5643        20200406.78133    9.067Ic  Nga.VSOLJ
SGRV5643        20200406.79634    8.816Ic  Nga.VSOLJ
SGRV5643        20200406.79848    8.727Ic  Nga.VSOLJ
SGRV5643        20200406.81348    8.731Ic  Nga.VSOLJ
SGRV5643        20200406.81564    8.656Ic  Nga.VSOLJ
---------------------------------------------------------------------
observer: K.Nagai (Kanagawa,Japan)
Instruments: 15L(F4) ATIK-490EX(ICX814), -10deg, U 5x5 60sec, B 4x4 45sec V/Ic 3x3 30sec
comp. star TYC2-6275.795.1 10.19U 8.58B 7.18V 5.78I
check star TYC2-6275.602.1
AIP4Win v.2.4.0, Aperture 7radius
error 0.061(U) 0.013(B) 0.050(V) 0.014(I)
---------------------------------------------------------------------

It was cloudy.
This is a secondary minimum of an EA-type eclipsing binary.

minII SGRV5643 2458946.260 0.003 Hel Nga.VSOLJ n=11 Ic

V5643 Sgr JD(hel)=2458946.260 C=2458946.337 E=3578.5 O-C=-0.077 Ic

min=2452080.6265+1.91860xE (GCVS5 08/Jul/2019)


              - 06/Apr/2020 V5643 Sgr (By K.Nagai) -
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   17                18                19                20   (UT)

Kazuo Nagai / PXS10547 at nifty.ne.jp ( http://eclipsingbinary.web.fc2.com/ )