  Based on photometric and astrometric data it has been proposed that Albus 1
(also known as CPD-20 1123) might be a hot white dwarf similar to G191-B2B or,
alternatively, a hot subdwarf. We obtained a series of optical spectra showing
that CPD-20 1123 is a bright He-B subdwarf. We analyzed the HI Balmer and HeI
line spectra and measured T_eff = 19800+/-400 K, log g = 4.55+/-0.10, and log
N(He)/N(H) = 0.15+/-0.15. This peculiar object belongs to a family of evolved
helium-rich stars that may be the products of double-degenerate mergers, or,
alternatively, the products of post horizontal- or giant-branch evolution.
