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Special Notice #327: HST/COS observations scheduled for U Gem

Due to the New England winter storm currently affecting the area, phone coverage at the AAVSO may be much reduced until Wednesday. The staff is still available via email, and we suggest using that method to contact us if you need assistance.

January 24, 2013:  Further to AAVSO Alert Notice 475 (,  HST/COS observations of U Gem have been scheduled for  2013 January 30 21:31:12 - 23:36:16 UT.

PI Dr. Michael Shara (American Museum of Natural History) writes: "All observations during the 24 hours leading up to, during, and after the observations will be very valuable. CCD data in U,B,V and I will be particularly appreciated." Observations are needed both to ascertain that U Gem is not in outburst at the time of the HST observations and to correlate and interpret the HST data.

Please observe U Gem and report your observations to the AAVSO International Database using the name U GEM.

Coordinates: R.A. 07 55 05.21   Dec. +22 00 04.8  (2000.0)

Charts may be created using the AAVSO Variable Star Plotter (

This AAVSO Special Notice was compiled by Elizabeth O. Waagen.


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