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## (from tabmap V6.0 (2016-08-18)) 2024-05-04T08:07:44 #--------------------------------------------------------------------------- #-- V/119 Catalogue of field contact binary stars (Pribulla+, 2003) #-------------------------------------------------------------------------- #---Table: V/119/./notes.dat Individual notes (88 records) # Star A9 --- Star name # Note A70 --- Text of the note -------------------------------------------------------------------------------- Star |Note ---------|---------------------------------------------------------------------- BX And|The brighter component of the visual double ADS 1671. Separation BX And|19.7". Possible presence of a third body on about a 60 year orbit BX And|seen in the (O-C) diagram. SS Ari|Possible quadruple system. A third body is seen in the (O-C) diagram SS Ari|on an ~44.8 years orbit. Possible fourth component on a 28 years SS Ari|orbit. AP Aur|Fast period increase since the beginning of the observations (1901) AP Aur|with mean (dP/dt)/P= +2.12*10^-6^year^-1^. The (O-C) residuals AP Aur|deviate from the parabolic representation. 44 Boo|Fainter component of the visual double ADS 9494. The orbital period of 44 Boo|the visual pair is 206 years. TU Boo: Abrupt period decrease 44 Boo|{Delta}P/P=-1.52*10^-5^ around 1983. TY Boo|Possible presence of a third body indicated by the sinusoidal TY Boo|variation (P~65years) seen in the (O-C) diagram. TZ Boo|Two abrupt period changes around 1979 ({Delta}P/P=-2.45*10^-5^) and TZ Boo|around 1992 ({Delta}P/P=+3.27*10^-5^). VW Boo|Secular period decrease (dP/dt)/P=-4.97*10^-7^year^-1^ since the VW Boo|beginning of the observations (1938). XY Boo|Fast period increase since the beginning of the observations (1944) XY Boo|with mean (dP/dt)/P= +1.56*10^-6^year^-1^. The (O-C) residuals XY Boo|deviate a lot from the parabolic representation. AC Boo|Abrupt period increase {Delta}P/P=+2.32*10^-5^ around 1980. CK Boo|Abrupt period increase {Delta}P/P=+2.0*10^-5^ around 1990. V366 Cas|Period increase since the beginning of the observations (1911) with V366 Cas|mean (dP/dt)/P=+5.27*10^-7^year^-1^. The (O-C) residuals deviate a V366 Cas|lot from the parabolic representation. V523 Cas|Presence of the third body on ~101 years seen in the (O-C) diagram. VW Cep|The system is probably quadruple - P3=31.4 years, e3=0.771, VW Cep|P4=18.6 years, e4=0.499. CV Cyg|Period decrease since the beginning of the observations (1898) with CV Cyg|mean (dP/dt)/P=-4.43*10^-7^year^-1^ or two abrupt period decreases CV Cyg|around 1930 and 1975. V1073 Cyg|Period decrease with mean (dP/dt)/P=-4.88*10^-7^year^-1^ since the V1073 Cyg|first photoelectric observation (1962). Old photographic V1073 Cyg|observations give the impression of the sinusoidal period change. EF Dra|Third component spectroscopically detected. Possible variation in the EF Dra|(O-C) diagram. Object discovered as an X-ray source. UX Eri|Irregular period variation. YY Eri|Sinusoidal variation seen in the (O-C) diagram interpreted as YY Eri|continuous mass transfer combined with LITE or cyclic magnetic YY Eri|activity. Abrupt period changes are another possibility. AK Her|The brighter component of the visual double ADS10408. AK Her|Separation 4.7". Quasi-sinusoidal period variation with two or more AK Her|periodicities. DF Hya|Period increase since the beginning of the observations (1935) with DF Hya|mean (dP/dt)/P=+4.24*10^-7^year^-1^ or abrupt period increase DF Hya|{Delta}P/P=+1.76*10^-5^ around 1965. EZ Hya|Fast period decrease since the beginning of the photoelectric EZ Hya|observations (1969) with mean (dP/dt)/P=-1.46*10^-6^year^-1^. EZ Hya|The (O-C) residuals deviate from the parabolic representation. SW Lac|Presence of two other components in the systems seen in the (O-C) SW Lac|diagram with 23 and ~90 years orbital periods. Multiplicity of the SW Lac|system confirmed by spectroscopic observations. XY Leo|Multiple system. The third component on a P~20 years orbit is a XY Leo|BY Dra binary with an orbital period 0.805 days. AM Leo|The brighter component of the visual double ADS 8024. AM Leo|Separation 11.3". Possible presence of a third body indicated by the AM Leo|sinusoidal variation (P~33 years) seen in the (O-C) diagram. V502 Oph|A third body detected spectroscopically. A continuous decreaseand a V502 Oph|probable sinusoidal oscillation with a period of 35yr in the (O-C) V502 Oph|diagram. V566 Oph|Abrupt period increase (dP/dt)/P=+1.41*10^-5^ around 1972. Latest V566 Oph|(O-C) residuals deviate from the linear representation. V839 Oph|Orbital period seems to be modulated by more than one mechanism. ER Ori|Member of a multiple system. The brighter component of ER Ori|IDS05065-00840. Separation 13.6". Another component detected by ER Ori|speckle interferometry 0.19" distant. Complicated (O-C) diagram. BX Peg|Period decrease since the beginning of the observations (1926) with BX Peg|mean (dP/dt)/P=-2.38*10^-7^year^-1^. Since 1986 period seems to be BX Peg|approximately constant. AU Ser|Abrupt period decrease {Delta}P/P=-1.49*10^-5^ around 1988. RZ Tau|Variable period increase since the beginning of the observations RZ Tau|(1916) with mean (dP/dt)/P=+2.37*10^-7^year^-1^. AH Tau|Abrupt period decrease {Delta}P/P=-1.17*10^-5^ around 1974. The (O-C) AH Tau|residuals before the change deviate from the linear representation. EQ Tau|Possible third body (P~50 years) indicated by the course of the (O-C) EQ Tau|residuals. W UMa|Complicated quasi-periodic change of the period since the beginning W UMa|of the observations (1902). TY UMa|Period increase since the beginning of the observations (1933) with TY UMa|mean (dP/dt)/P=+7.13*10^-7^year^-1^ or two abrupt period increases, TY UMa|the second around 1981. AW UMa|Variation seen in the (O-C) diagram interpreted as LITE or two abrupt AW UMa|period decreases. The presence of a third body indicated by the AW UMa|systemic velocity changes. AH Vir|The brighter component of a visual double ADS 8472 with ~1280 years AH Vir|orbit. Presence of a third body on a 11.2 years orbit seen in the AH Vir|(O-C) diagram. --------------------------------------------------------------------------------