COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS Number 3445 Konkoly Observatory Budapest 14 March 1990 HU ISSN 0374 - 0676 HR 8062 A NEW VARIABLE IN CYGNUS Photoelectric photometry of HR 8062 = HD 200527 SAO 50381 = GC 29388 obtained between November 3, 1989 and January 24, 1990 indicates a range of 6.18=6.36 V and a period of 36 days between maximum. Only two cycles of minima light were obtained, (Figure 1) and it can be seen the amplitude of the variation of luminosity appears to be fluctuating, increasing by 0.04m. Due to this phenomena over a characteristic time interval we might conclude HR 8062 is a semiregular giant variable with probable multiple periods. HR 8062 is listed as 6.38 V spectral type Mb, Buscombe spectral type = M4 III, (RA = 21h00m37s D = +44d 35.6' (1950) in the Yale Bright Star Catalogue (Hoffleit and Jaschek 1982)· Sky Catalogue 2000.0 list HR 8062 at magnitude 6.19m V, B-V = 1.69, spectral type M3 Ib-II, (RA = 21h02m 23.9s, D = +44d 47'28" (2000). (Hirshfeld and Sinnott 1982). The two listed magnitudes correspond to the brightest and minimum magnitudes obtained during the sequence. When it was anticipated the period might be around 36 days one measurement or normal point per night was necessary. A search of the General Catalogue of Variable Stars (Kholopov et al. 1985), the New Catalogue of Suspected Variable Stars (Kholopov et al. 1982) and the 67th, 68th and 69th Name-List of Variable Stars (Kholopov et al., 1985, 1987, 1989) indicates that it is not known as a variable. HR 8062 was selected as a potential variable star because the spectra is similar to those of other known variable stars of mainly small amplitude (Hoffleit 1979). The observations were made using a Optec 3 photometer attached to the 0.56m (22 Inch) telescope at the MacLean Observatory and the 0.25m (10 Inch) telescope at the Tahoe Observatory. Altogether 38 and 29 differential magnitudes of HR 8062 in V and B bandpass, respectively, were obtained. The delta magnitudes have been corrected for extinction and transformed to the standard BV system. Each delta magnitude was calculated from three delta magnitudes in the sense V - C (Table I). The comparison star was HD 200407 = SAO 50368 A2 6.72m V, B-V = 0.30 and the check star was HD 200560 = SAO 50388, K2, 7.68m V, B-V = 0.97 (Figure 2). [FIGURE 1] Figure 1. Differential V, B and B-V colour curves of HR 8062 [FIGURE 2] Figure 2. Finding chart. V= HR 8062 C= Comparison K= Check TABLE 1 HR 8062 HJD DELTA sd HJD DELTA sd -2447... V -2447... B 834.6251 -0.459 .021 844.6009 0.894 .005 835.6124 -0.458 .008 845.5914 0.893 .077 839.6087 -0.412 .004 853.5939 0.859 .022 844.5881 -0.409 .017 858.6085 0.832 .030 845.5799 -0.386 .003 859.6508 0.845 .040 850.6518 -0.409 .003 865.5893 0.790 .051 850.7193 -0.403 .003 866.5766 0.765 .000 851.5854 -0.421 .007 867.5880 0.857 .021 853.5819 -0.451 .012 867.7197 0.830 .007 853.6094 -0.447 .006 873.5839 0.849 .041 858.5928 -0.512 .007 874.5841 0.856 .005 859.5882 -0.521 .001 875.5835 0.917 .021 859.6762 -0.519 .003 877.5794 0.916 .097 860.5787 -0.536 .015 878.5834 0.932 .041 861.5783 -0.521 .016 890.5969 0.806 .014 861.6176 -0.527 .015 891.5905 0.795 .019 865.5880 -0.532 .006 892.5912 0.809 .032 866.5753 -0.532 .014 894.5921 0.795 .020 866.6130 -0.540 .014 894.6261 0.758 .054 867.5867 -0.521 .004 895.5922 0.759 .028 867.7181 -0.512 .003 896.5950 0.812 .040 874.5829 -0.410 .009 901.5909 0.785 .009 875.5824 -0.380 .014 910.6049 0.869 .008 877.5783 -0.362 .016 911.5992 0.899 .053 878.5823 -0.386 .007 912.5991 0.842 .022 890.5958 -0.476 .012 913.6003 0.871 .015 891.5892 -0.499 .019 914.6043 0.935 .035 892.5902 -0.520 .014 915.6030 0.919 .070 894.5906 -0.513 .008 916.6044 0.897 .031 894.6251 -0.522 .023 895.5912 -0.523 .011 896.5941 -0.529 .009 897.6057 -0.534 .005 910.6040 -0.383 .017 911.5980 -0.360 .009 912.5980 -0.368 .012 913.5990 -0.338 .013 914.6032 -0.317 .011 I would like to acknowledge my gratitude to Mr. Gordon MacLean for the use of the MacLean Observatory and the 0.56m telescope, and to the Sierra College, Rocklin, California for providing the necessary photometry equipment. LEROY SNYDER MacLean Observatory Tahoe Observatory P.O. Box 1092 Crystal Bay, NV 89402 USA References: Hirshfeld, A., and Sinnott, R.W. 1982, Sky Catalogue 2000.0, Cambridge University Press/Sky Publishing Corporation [BIBCODE 1982QB6.S54b....... ] Hoffleit, D., and Jaschek, C. 1982, The Bright Star Catalogue 4th edition, Yale University Observatory, New Haven, CT [BIBCODE 1982bscf.book.....H ] Hoffleit, D. 1979, Journ. Amer. Assoc. Var. Star Obs. 8, No. 1, 17 [BIBCODE 1979JAVSO...8...17H ] Kholopov, P.N., et al. 1982, New Catalogue of Suspected Variable Stars Moscow [BIBCODE 1982ncss.book.....K ] Kholopov, P.N., et al. 1985, General Catalogue of Variable Stars Fourth Edition, Moscow Kholopov, P.N., et al. 1985, Inform. Bull. Var. Stars No. 2681 Kholopov, P.N., et al. 1987, Inform. Bull. Var. Stars No. 3058 Kholopov, P.N., et al. 1989, Inform. Bull. Var. Stars No. 3323