243 V630 CASSIOPEIAE (UG:) Range: 12.3p-17.1p Position: 23 48 51.94 +51 27 39.3 (J2000, from .dat file) Magnitude: V=16.558 B-V=0.888 (in .dat file) ID RA (2000) DEC X Y N V ERR B-V ERR a) Comparison star sequence 1 23 48 38.8 +51 25 13 -125 -144 2 11.220 0.041 1.316 0.050 2 23 48 35.5 +51 26 47 -154 -50 2 12.670 0.041 0.466 0.050 3 23 48 56.2 +51 27 12 40 -27 3 14.085 0.009 0.728 0.020 4 23 48 46.1 +51 29 04 -55 85 3 14.232 0.014 0.678 0.016 5 23 48 54.3 +51 27 52 22 13 3 14.485 0.010 1.076 0.003 6 23 49 01.7 +51 24 47 92 -172 3 14.929 0.017 0.514 0.024 7 23 49 05.2 +51 29 19 124 100 3 15.430 0.056 0.742 0.039 8 23 48 58.3 +51 27 31 60 -8 3 15.685 0.033 0.919 0.047 9 23 48 59.2 +51 28 18 68 39 3 16.124 0.040 0.440 0.085 10 23 48 56.6 +51 26 32 44 -67 2 16.627 0.023 0.686 0.006 11 23 48 58.2 +51 26 32 59 -67 2 17.214 0.022 0.742 0.067 b) Wide-colour extension for CCD calibration 23 49 00.8 +51 25 23 84 -136 3 14.233 0.020 0.389 0.017 Notes: 1. An extensive list of CCD magnitudes was published in Henden and Honeycutt, PASP, 107,324,1995. This version, a subset of the original list, is newly recalibrated by Arne Henden in 2001 from the original data and extended at the faint end from the same data set. 2. The two brightest stars in this sequence are from Misselt, PASP, 108,146,1996. Misselt's V magnitudes are approximately 0.04 mag too faint, and this should be taken into account when using these two magnitudes. 3. There are three bright Tycho-2 stars in this field, one at 23h 48m 25.5s +51d 25' 34" with a reliable magnitude of 9.76+/-0.02, and another at 23h 49m 03.2s +51d 33' 07" with a reliable magnitude of 9.96/-0.02 and a third 23h 48m 25.6s +51d 21' 30" with a reliable magnitude of 10.07/-0.0. Bruce Sumner 16 October 2001