CH Cyg, BD+49 2999, HD 182917, HIP 095413, IRC +50294, SAO 031632
19 24 33.07, +50 14 29.1
We inform on an extreme fading of the unique symbiotic star CH Cyg in the near
infrared (1.25 - 5 microns). During our observations of the system between 1978 and
the end of 2006, such an IR fading is observed for the first time. For example, compared
to the system's IR fading in 1996 (Taranova and Shenavrin, 2004), its brightness
in the J filter (1.25 microns) has additionally decreased by approximately 0.7 mag.
displays variations of the system's J-band
brightness in 1978-2006. The absolute lowest J-band brightness ever observed is marked
with the arrow at JD 2454049. The horizontal line notes
the minimum of 1996.