See data from DS23 at http://stupendous.rit.edu/tass/data/ds23/gsc_00190-00120.dat
John Greaves:
Carbon star GSC 00190-00120 = CGCS 1749 at RA 113.0417 DEC +05.8321 is probably a long period variable, almost constant in the far red, varying more the bluer the passband (related to RCB???) See http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-newvar/msg01458.html