\\ Species Tag:        &   76010 & Name:&  C5O 
\\ Version:            &       1 & & Pentacarbon monoxide 
\\ Date:       &  May 1996       & & X $^1 \Sigma ^+$
\\ Contributor:&  H. S. P.  M\"uller & & 
\\             &                 & & 
\\ Lines Listed:       &      99 & Q(300.0)=&     4574.6813
\\ Freq. (GHz) $<$     &     271 & Q(225.0)=&     3430.8963
\\ Max. J:             &      99 & Q(150.0)=&     2287.2410
\\ LOGSTR0=            &    -8.0 & Q(75.00)=&     1143.7201
\\ LOGSTR1=            &    -3.0 & Q(37.50)=&      572.0100
\\ Isotope Corr.:      &         & Q(18.75)=&      286.1677
\\ Egy. (cm$^{-1}$) $>$&     0.0 & Q(9.375)=&      143.2498
\\ $\mu_a$ = & 4.057             & A=& 
\\ $\mu_b$ = &                   & B=&  1366.8471
\\ $\mu_c$ = &                   & C=&  
\headend 

The data were taken from 
T. Ogata, Y. Ohshima, and Y. Endo, 
1995, J. Am. Chem. Soc. {\bf 117} 3593.

The dipole moment is from an $ab \ initio$ calculation: 
P. Botschwina, J. Fl\"ugge, and P. Sebald,
1995, J. Phys. Chem. {\bf 99} 9755.
N. Moazzen-Ahmadi and F. Zerbetto, 
1995, J. Chem. Phys. {\bf 103}, 6343,
obtained 3.376. The former calculation is expected 
to be more reliable.

The partition function has been calculated up to $J$ = 250 
because of the low rotational constant.