The list below shows several stars in a field on the southeast side of the globular cluster M92. This is overhead at dusk just now, but because it is not far from the northern ecliptic pole, it is available much of the year for northern observers. It is one of many situated in the field of some target you might observe anyway. The stars are fairly isolated in the field, and the field-center is rigged for the 22'x22' useful field of the Lowell 1.1-m telescope. I list only stars with fairly high-weight data; many more stars can be calibrated more reliably. In observing, I try to maximize counts in any filter on the brightest star (HD 156821 on the east side of the cluster), and let the rest fall where they may. The main data source in this case is Peter Stetson's 'homogeneous photometry' files at:
https://www.canfar.net/storage/list/STETSON/homogeneous/Latest_photometry_for_targets_with_at_least_BVI/
...with some added stars from Arne Henden and Mike Jerzykiewicz (world's best photometrist from the 1960s-90s that no one's ever heard of).
The list shows a name, J2000 coords, the data, its source, the number of observations and (usually) mean errors on the values (the latter as a comma-delimited string). Data from Arne's files give rms errors rather than mean errors. The idea is that one weights the stars by including the observational errors and the uncertainties on the standard values themselves in a robust least-squares sense. In most cases the errors are likely to be a lot smaller than your observational errors, so could be ignored. A few of the stars are members of the cluster.
The table columns line up with an equal-spaced font, but will look ragged with the proportional font used in the forum.
\Brian
--- NGC 6341-SE = Messier 92 field center: 17 17 52 +43 01 (J2000)
--- color ranges: 0.41 < B-V < 1.50; -0.16 < U-B < 1.77
Name RA (J2000) Dec V B-V U-B V-R R-I V-I source
TYC 3081-0200-1 17 16 56.78 +43 05 37.0 11.756 0.436 -0.051 0.242 0.227 0.469 Henden n=3 errors 0.006,0.020,0.060,0.004,0.007,0.008 (U-B uncer)
M92-S4279 17 17 13.90 +43 01 49.3 12.811 1.128 1.064 0.637 0.543 1.180 Stetson n~50 errors 0.0020,0.0028,0.0031,0.0081,0.0090,0.0049
M92-S4499 17 17 31.72 +43 05 41.5 12.767 1.043 0.478 0.615 0.594 1.209 Stetson n~25 errors 0.0027,0.0034,0.0038,0.0065,0.0075,0.0053
HD 156821 17 17 40.97 +43 08 58.2 9.773 0.411 0.028 0.246 0.235 0.481 Jerzykiewicz n=7 UBV/Henden n=3 VRI errors 0.007,0.007,0.007,0.006,0.002,0.006
M92-S5974 17 17 42.19 +42 51 35.3 13.487 0.677 0.136 0.751 Stetson n~25 errors 0.0024,0.0036,0.0036,,,0.0038
M92-S5563 17 17 47.05 +43 07 12.0 12.864 0.665 0.071 0.383 0.365 0.748 Stetson n~20 errors 0.0019,0.0028,0.0034,0.0071,0.0083,0.0051
M92-S4581 17 17 55.75 +42 57 14.3 11.704 0.619 0.119 0.694 Stetson n~20 errors 0.0038,0.0060,0.0056,,,0.0087
M92-S4588 17 18 01.65 +42 59 47.6 13.987 0.728 0.323 0.418 0.341 0.759 Stetson n~20 errors 0.0025,0.0041,0.0039,0.0046,0.0064,0.0057
TYC 3081-0438-1 17 18 06.23 +42 53 33.6 11.258 1.001 0.716 0.969 Stetson n~5 errors 0.0040,0.0042,0.0024,,,0.0129
M92-S4595 17 18 07.21 +43 02 55.5 14.265 0.510 -0.156 0.637 Stetson n~10 errors 0.0022,0.0038,0.0073,,,0.0049
M92-S6021 17 18 12.05 +42 55 02.5 11.949 1.499 1.771 Stetson n=7 errors 0.0038,0.0068,0.0079