COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS Number 4030 Konkoly Observatory Budapest 20 May 1994 HU ISSN 0374 - 0676 POSITIONS FOR STARS IN THE FIELDS OF UX ANTLIAE AND UW CENTAURI Recently in these Bulletins, Milone (1994) provided UBV photometry for stars in the fields of the R CrB-type stars UX Antliae and UW Centauri. Although finder charts were provided for these stars, identifications and positions were not. Since modern or modernized telescopes usually have good pointing ability, it is useful - even necessary - to have accurate positions to operate the telescope efficiently. Furthermore, there is no need to give new names to stars that already appear in widely available catalogues. I have extracted positions from the Guide Star Catalogue (GSC) for all the stars observed by Milone, and also made identifications in traditional star catalogues for the brighter ones. Table 1. Positions for the variables RA (2000) Dec UX Ant: 10h57m09.0s -37d23'56" (GSC) UW Cen: 12h43m17.1s -54d31'40" (GSC) 17.1 40 (Villada 1980) 17.0 40 (Torres et al. 1985) 15.7 32 (IRAS) In Tables 2 and 3 are the positions for the comparison stars measured by Milone. The letter names are those given on Milone's charts. The companion 15 arcsec NW of UX Ant mentioned by Milone does not appear in the GSC. Also, none of the close pairs mentioned is resolved in the GSC. Table 2. Positions and identifications for stars near UX Antliae Names RA (2000) Dec Other IDs h m s d ' " A = CoD-36d6800 10 56 15.3 -37 18 36 CPD-36d4696 B = GSC 7724-2159 10 57 08.6 -37 30 55 CoD-36d6813=CPD-36d4704 C = GSC 7211-1506 10 56 28.2 -37 10 25 E = GSC 7212-0122 10 57 10.7 -37 13 44 CoD-36d6814 F = GSC 7212-0258 10 57 03.9 -37 24 24 CoD-36d6812= CPD-36d4703 G = GSC 7212-0355 10 57 50.9 -37 27 52 CoD-36d6822 H = GSC 7212-0025 10 57 32.6 -37 22 57 Table 3. Positions and identifications for stars near UW Centauri Names RA (2000) Dec Other IDs h m s d ' " A = HD110445 12 42 39.2 -54 32 18 CPD-53d5285 B = HD110517 12 43 14.7 -54 24 35 CPD-53d5291 C = HD110551 12 43 26.7 -54 38 50 CPD-53d5294 D = GSC 8651-0342 12 43 59.0 -54 26 20 F = GSC 8651-0814 12 43 47.6 -54 26 16 G = GSC 8651-0586 12 43 45.2 -54 34 39 H = GSC 8651-0546 12 43 30.1 -54 32 13 I = GSC 8651-0894 12 43 26.1 -54 32 43 J = GSC 8651-0400 12 43 32.7 -54 31 28 K = GSC 8651-600 12 43 11.2 -54 28 03 - GSC 8651-0720 12 43 16.0 -54 31 20 = comp 20" NNW of UW Cen Both variables appear in the GSC. UX Ant = GSC 7212-0077. UW Cen has several identifications: CPD-53d5293 = CoD-53d4775 = IRAS 12404-5415 = GSC 8651-0852. In the case of UW Cen, the GSC position merely confirms high-precision measures published previously. The IRAS identification for this star appears secure: although the IRAS position is offset somewhat, the precise positions fall well within the error ellipse. Positions for the variables are given from various sources in Table 1 for equinox 2000. Brian A. SKIFF Lowell Observatory 1400 West Mars Hill Road Flagstaff AZ 86001-4499 Internet: bas@lowell.edu References: Milone, L. A., 1994, IBVS, No. 4002 Torres, G., Milone, L. A., and Villada de Arnedo, M. M., 1985, Astron. J., 90, 680 [BIBCODE 1985AJ.....90..680T ] Villada, M. M., 1980, IBVS, No. 1748