Mark IV measurements of GSC 00445-01993

See data at http://stupendous.rit.edu/tass/data/ds23/gsc_00445-01993.dat

Tom Droege:

tass 277.3044 +6.7872

I think I will report them in decimal degrees.  Any one who cares can 
convert it. This is a nice smooth variable.  It changed about .4 mag in 2 
hours.  If I had to guess, I would give it an 8 hour period, with possibly 
a .8 mag variation.  It is found as a suspected variable in VizieR.

I think this one is where you can look at it.  I don't know, I never 
actually look through a telescope.  ;^)  My neck will no longer bend around 
enough to make it any fun.  It is all I can do to sit straight up and stare 
at a terminal.

Michael Koppelman

Looks like this is GSC 00445-01993 at 18 29 13.016 +06 47 13.76 according 
to Tycho2. USNO A2 reports B=11.3 and R=9.1. Looks
like a gooder! I think 
this is a little low in the east until 1am or so.
Should be a great 
candidate in the coming months.

Patrick Wils

The star Tom mentions is NSV 10892 = GSC 0445-1993 =
HD 170451 (B=9.97, V=9.44), a G-type star and also the
ROSAT source 1RXS J182912.6+064717.  It is situated in
the open cluster NGC 6633, on which a number of papers
have appeared in the past.  Data about this cluster
can be found at the WEBDA page
 http://obswww.unige.ch/webda/cgi-bin/ocl_page.cgi?cluster=ngc+6633
(look for the star 147).
There is also a paper by Schutt
 (http://simbad.u-strasbg.fr/cgi-bin/cdsbib?1995BAAS...27Q1439S)
about the detection of delta Scuti stars in this
cluster (I don't have access to the paper myself), but
the spectral type excludes the star from the delta
Scuti class.

Michael Koppelman

I got some data on this last night. I was lucky to hit a minimum. Light 
curve is here:

 http://www.lolife.com/astronomy/gsc445-1993.jpg 

Michael Koppelman

I set up a directory for this and added the raw data and a phase plot. I 
realize it is way premature to do a phase plot, but I wanted to see how my 
data mixed with the tass data. Using the Tycho2 mag for the comp star, 
they seem to match up perfectly.

 http://www.lolife.com/astronomy/gsc445-1993/ 

Please let me know if anyone else grabs data for this. It's nice and 
bright and well placed.