34   HL CANIS MAJORIS   (UGSS)   Range: 10.5-14.2V
     Position:   06 45 17.20  -16 51 34.9 (J2000, from .dat file)
     Magnitude:  V=14.216  B-V=0.316      (from .dat file)

ID     RA (2000)    DEC       X    Y   N    V      ERR     B-V    ERR

a) Comparison star sequence

1    06 44 58.7  -16 47 51  -266  224  4   8.503  0.137    1.123  0.108   
2    06 44 58.4  -16 49 31  -269  124  5  10.353  0.009    1.146  0.011   
3    06 45 02.6  -16 46 15  -210  320  4  10.926  0.029    0.559  0.018   
4    06 44 49.1  -16 53 31  -404 -116  6  11.729  0.015    0.416  0.011   
5    06 45 19.0  -16 48 09    25  206  7  11.760  0.008    1.250  0.012   
6    06 44 50.4  -16 50 41  -384   55  7  11.952  0.063    0.523  0.023   
7    06 45 00.0  -16 50 31  -247   64  4  13.042  0.006    0.685  0.011   
8    06 45 05.8  -16 56 27  -163 -292  4  13.569  0.012    0.678  0.008   
9    06 45 17.6  -16 52 39     6  -64  4  13.766  0.016    0.591  0.029   
10   06 45 13.0  -16 52 40   -60  -65  3  14.149  0.018    0.929  0.020   
11   06 45 27.4  -16 54 36   147 -181  3  14.294  0.008    0.705  0.022   
12   06 45 22.5  -16 52 47    76  -72  3  14.459  0.000    0.982  0.017   
13   06 45 21.7  -16 49 40    65  115  3  14.713  0.014    0.889  0.003   
14   06 45 12.3  -16 50 14   -71   82  3  14.997  0.023    0.923  0.061   
15   06 45 09.6  -16 51 56  -110  -21  2  15.462  0.012    0.771  0.006   
16   06 45 14.1  -16 51 38   -45   -3  2  15.856  0.000    0.480  0.047   


b) Wide-colour extension for CCD calibration

     06 45 01.5  -16 46 36  -225  299  2  15.847  0.146   1.533  0.252   


Notes:

1. The first six stars in this sequence are saturated, and their magnitudes
and colours are approximate. However star #1 has a reliable Tycho-2 magnitude 
of V=8.57+/0.04.

2. Star 5 is the variable star HM CMa, catalogued as a UV Cet type variable
with a range of 8.9-11.97V. However there was no hint of variability during 
the determination of this sequence, and it would appear to be relatively 
constant but with possible occasional bright flares.

3. There is a preliminary AAVSO 'e' chart dated 04/1989 available, with the
following photoelectric V magnitudes: 

                       ID   Henden   AAVSO
                               V       V
                        1     8.503    8.5  
                        2    10.353   10.4
                        4    11.729   11.6
                        6    11.952   11.8
                        7    13.042   13.0
                        8    13.569   13.5
                        9    13.766   13.7
                        10   14.149   14.4 See note below
                        12   14.459   14.5

4. The star shown as 144 on the AAVSO chart appears to be misplotted. The 
star on the chart some 35 arcsec south of 144 has been measured by 
Henden as V=14.399, and this would seem to be the correct identification 
of the AAVSO star 144.      

5. Appears to fluctuate considerably in quiescence between about V=13.4 
and V=14.2.


Bruce Sumner
Revised 27 July 1999
Second revision 24 January 2001