No B mags for sequence for V0512 Cam

Technology
1

I collected some (B, V) images last night for V0512 Cam which is near the north celestial pole. When trying to analyze them today I found that none of the sequence stars have B values. I generally transform my observations but this means I can’t do that, nor can I even get untransformed B values.

I’ve never run into this before. All of the comp stars are listed as coming from Gaia DR2. Looking at the past data collected for this star, people are reporting B values so at some point the comp stars must have had this.

Is there any way to proceeded?

2

We can’t get B values from Gaia because its detector response curve is too wide (actually double-peaked) in B. Not sure why gaia was used - the sequence team usually use gaia for faint, far-southern stars not covered by Panstarrs (which goes as faint as gaia but only to about 30 degrees S).
A sequence with more colours could be derived from APASS.