202 V344 ORIONIS (UG) Range: 14.0v-17.5p Position: 06 15 18.95 +15 30 59.7 (J2000, from .dat file) Magnitude: V=17.288 B-V=0.688 (.dat file) ID RA (2000) DEC X Y N V ERR B-V ERR a) Comparison star sequence 1 06 15 06.8 +15 34 27 -175 207 3 11.596 0.054 0.412 0.027 2 06 15 29.7 +15 35 19 156 259 3 12.646 0.006 0.391 0.003 3 06 15 11.4 +15 26 38 -108 -263 4 12.865 0.011 0.485 0.004 4 06 15 26.0 +15 27 42 103 -198 3 13.293 0.008 0.629 0.005 5 06 15 23.6 +15 27 12 68 -228 3 13.583 0.009 0.745 0.003 6 06 15 12.1 +15 32 27 -99 87 3 14.097 0.016 0.730 0.005 7 06 15 03.0 +15 33 33 -230 153 3 14.259 0.010 0.708 0.005 8 06 15 21.8 +15 31 56 41 56 3 14.845 0.011 0.870 0.005 9 06 15 27.5 +15 32 08 124 68 3 15.341 0.009 0.835 0.010 10 06 15 23.7 +15 28 24 69 -156 3 15.590 0.013 0.863 0.003 11 06 15 25.0 +15 29 30 88 -90 3 16.214 0.013 0.929 0.024 12 06 15 17.4 +15 31 08 -22 7 3 17.208 0.021 0.998 0.020 13 06 15 20.7 +15 30 58 26 -3 3 18.671 0.103 1.387 0.199 b) Wide-colour extension for CCD calibration 06 15 12.3 +15 25 29 -96 -331 3 12.889 0.014 0.464 0.006 06 15 11.9 +15 33 18 -101 138 3 13.623 0.005 1.952 0.011 Notes: 1. There are two bright stars near the edge of this field. One is at 06h 14m 48.3S +15d 22' 24" and has a reliable Tycho-2 magnitude of V=10.18+/-0.04. The other, near the southwest corner at 06h 14m 58.0S +15d 37' 01" has a reliable Tycho-2 magnitude of 9.14+/-0.02. 2. Star #1 is saturated and its magnitude and colour are approximate. It has a semi-accurate Tycho-2 magnitude of 11.42+/-0.11. The value given above is suitable for visual use, but it should not be used for CCD work. 3. There is another variable star in this field, at 0hh 15m 30.0s +15d 34' 26". This is V645 Ori, an EA/SD variable with a range of 13.3-14.7p and a period of 1.040442 days. During this sequence determination is was measured with V=12.894+/-0.070 and B-V=0.513+/-0.008 4. A check of Digital Sky Survey images shows that V344 Ori is about magnitude 18.8p at minimum. Bruce Sumner 22 January 2001 Revised 1 April 2001