emamajek on 25-Dec-2018 03:02:31 GMT about G 250-31B
SIMBAD is currently lacking a spectral type. I suggest:
M6V
2014AJ....147...20N
LSPM J0657+6219W = WDS J06579+6220B = Gaia DR2 1099288637370627072
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View annotation on G 250-31B object