Catalogue details XZ 6040 = SAO 76721 = ZC 709 = tau Tauri RA = 4 42 14.7007 PM = -0.00021s Dec = 22 57 24.943 PM = -0.0203" Mv = 4.33, Mb = 0.00, Mr = 0.00 Spectrum B3 Dia: .0000" [Estimated] Star is component A in the following system Name Cmpt Yr1 Yr2: PA1 PA2 : Sep1 Sep2 : Mag1 Mag2: #1 #2 mean S 455 : : 0.050 : 8.60 8.60: S 76720 ------ MCA 16 Aa,Ab 1980 2007: 204.0 36.0: 0.200 0.300: 4.33 6.97: R 709 X 32222 S 455 AB 1777 2008: 212.0 215.0: 60.000 62.000: 4.24 7.02: R 709 S 76720 WDS Discoverer codes MCA McAlister, H.A. S South, J. Orbital elements Name Cmpt Period a" i node T e peri MCA 16 Aa,Ab 57.90000 0.284000 130.7000 4.1000 2037.96000 0.35700 142.2000 Year PA Sep 2009 30.96 0.34 2010 28.38 0.35 2011 25.89 0.35 2012 23.46 0.36 2013 21.09 0.36 ================================================================== WDS entries RA Dec Name Y1 Y2 N PA PA Sep Sep M1 M2 04422+2257MCA 16Aa,Ab 1980 2007 37 204 36 0.2 0.3 4.33 6.97 B3V -002-016 +22 739 NOD 044214.70+225725.1 04422+2257S 455AB 1777 2008 38 212 215 60.0 62.0 4.24 7.02 B3V -003-015 -001-014 +22 737 D 044214.70+225725.1 ------------------------------------------------ Interferometric catalogue entries 044212.19+225632.5 BDS 2313 S 455B HD 284659 TYC 1830 02131 1 04422+2257 N Date PA Sep M1 M2 1998.7749 . . < 0.022 . . . . . 545 30 6.0 1 Bag2002 Spe 044214.70+225725.1 BDS 2313 MCA 16Aa,Ab HD 29763 HIP 21881 04422+2257 N O Date PA Sep M1 M2 1980.7210 203.5 . 0.173 . . . . . 470 3.8 1 McA1983 Sch 1982.7551 184.7 . 0.192 . . . . . 549 22 3.8 1 McA1987b Sch 1982.7633 183.9 . 0.193 . . . . . 549 22 3.8 1 McA1987b Sch 1982.7661 185.3 . 0.194 . . . . . 549 22 3.8 1 McA1987b Sch 1983.0474 182.1 . 0.194 . . . . . 549 22 3.8 1 McA1987b Sch 1983.7163 177.7 . 0.193 . . . . . 549 22 3.8 1 McA1987b Sch 1983.9337 182.0 1.1 0.255 0.010 . . . . 550 3 2.0 1 Bnu1984 Spe 1983.9391 184.0 1.1 0.257 0.010 . . . . 550 3 2.0 1 Bnu1984 Spe 1983.9580 175.2 . 0.202 . . . . . 600 14 6.0 1 Bag1985 Spe 1984.0524 174.7 . 0.196 . . . . . 549 22 3.8 1 McA1987b Sch 1984.779 :167.6 . : 0.227 . . . . . 550 1.0 1 Tok1985 Pgi 1984.8457 169.0 . 0.200 . . . . . 600 14 6.0 1 Bag1987 Spe 1984.9308 167.5 1.8 0.203 0.013 . . . . 550 1.9 1 Bnu1986 Spe 1985.0271 167.0 1.9 0.195 0.013 . . . . 550 1.9 1 Bnu1986 Spe 1985.1827 167.1 . 0.196 . . . . . 600 14 6.0 1 Bag1987 Spe 1985.8380 160.8 . 0.199 . . . . . 549 22 3.8 1 McA1987b Sch 1986.8865 152.6 . 0.197 . . . . . 549 22 3.8 1 McA1989 Sch 1987.2717 165.8 . 0.215 . . . . . 549 22 3.8 1 McA1989 Sch 1987.7573 145.9 . 0.196 . . . . . 549 22 3.8 2 McA1989 Sch 1988.2601 143.4 . 0.194 . . . . . 549 22 3.8 1 McA1989 Sch 1988.6609 138.7 . 0.198 . . . . . 549 22 3.8 1 McA1990 Sch 1989.2292 133.3 . 0.197 . . . . . 549 22 3.8 1 McA1990 Sch 1990.7554 121.8 . 0.195 . . . . . 549 22 3.8 2 Hrt1992b Sch 1990.7722 357. 1.4 0.197 0.011 . . . . 600 20 1.0 1 Bag1993 Spe 1991.25 125. . 0.196 . 4.33 . 6.97 . 550 0.3 1 HIP1997a Thp 1991.8969 113.0 . 0.196 . . . . . 549 22 3.8 1 Hrt1994 Sch 1993.0132 V 73. . 0.1613 0.0010 . . 1.82 0.02 2360 460 1 Rch1994a Occ 1993.2021 102.7 . 0.204 . . . . . 549 22 3.8 1 Hrt1994 Sch 1995.7684 84.6 . 0.217 . . . . . 549 22 2.5 1 Hrt1997 Sch 1995.9240 85.2 . 0.215 . . . . . 549 22 2.5 1 Hrt1997 Sch 1996.8689 78.8 . 0.224 . . . . . 549 22 2.5 1 Hrt2000a Sch 1997.1364 77.8 . 0.222 . . . . . 549 22 2.5 1 Hrt2000a Sch 1998.7749 68.3 0.5 0.244 0.002 . . . . 545 30 6.0 1 Bag2002 Spe 2002.8842 . . 0.29 0.02 . . 2.24 0.03 900 340 3.6 1 Rbr2005 U 2002.9989 49. 2. 0.30 0.02 . . 2.33 0.03 900 340 3.6 1 Rbr2005 U 2004.8242 44.0 0.3 0.303 0.002 . . 2.48 0.02 545 30 6.0 1 Bag2007b Spe 2005.8690 39.2 . 0.314 . . . 2.4 . 550 24 3.8 1 Msn2009 Sus 2007.0096 37.0 . 0.324 . . . 2.35 . 698 39 3.5 1 Hor2010 Spe 2007.0123 36.1 . 0.336 . . . 2.56 . 550 40 3.5 1 Hor2010 Spe 044214.70+225725.1 BDS 2313 S 455AB HD 29763 HIP 21881 04422+2257 N Date PA Sep M1 M2 1991.25 . . . . 4.328 0.019 6.970 0.215 511 222 0.3 1 HIP1997f Thp 1991.56 213.4 . 62.900 . 4.24 . 7.02 . 530 100 1.4 1 TYC2000c Tty