W. Van Dyke Dixon and Arthur F. Davidsen
Department of Physics and Astronomy, The Johns Hopkins University
Charles and 34th Streets, Baltimore, Maryland 21218
and
Henry C. Ferguson
Space Telescope Science Institute, Baltimore, MD 21218
3 Å. It has
numerous absorption features, but no emission features other than
terrestrial airglow lines. We have fit the data with Kurucz stellar
atmosphere models using a 
minimization technique.
The Kurucz model which best fits the observed spectrum has
K, 
, and 
; however,
it overpredicts the flux in
the sub-Ly
region by nearly a factor of three. Kurucz line
profiles fit to the star's H
Balmer line yield 
.
Assuming a distance of 
kpc, we estimate the stellar
luminosity to be 
. These atmospheric
parameters place the star on the Schönberner post-AGB evolutionary
tracks. We measure the equivalent widths of the star's absorption lines
and find them consistent with the abundances of cluster giant and AGB
stars, except for carbon, which may be underabundant, suggesting that
CNO-processed material was brought to the surface while the star was on
the AGB. We conclude that non-LTE effects and non-solar abundance
ratios not included in the Kurucz models are important in this star.