Table 2: Positions of ISO observations in absolute coordinates.
Name* TDT-No. RA [J2000] Dec [J2000]
DR21 E/East 15200785 $20^{\rm h}39^{\rm m}09~\hbox{$.\!\!^{\rm s}$ }14$ $42^\circ20'05\hbox{$.\!\!^{\prime\prime}$ }0$
DR21 C/Center 15200786 $20^{\rm h}39^{\rm m}00~\hbox{$.\!\!^{\rm s}$ }93$ $42^\circ19'42\hbox{$.\!\!^{\prime\prime}$ }0$
DR21 W/West 15200787 $20^{\rm h}38^{\rm m}52~\hbox{$.\!\!^{\rm s}$ }23$ $42^\circ19'00\hbox{$.\!\!^{\prime\prime}$ }5$
DR21 (OH) 34700439 $20^{\rm h}39^{\rm m}00~\hbox{$.\!\!^{\rm s}$ }95$ $42^\circ22'37\hbox{$.\!\!^{\prime\prime}$ }6$
DR21 FIR1 35500317 $20^{\rm h}39^{\rm m}00~\hbox{$.\!\!^{\rm s}$ }2$ $42^\circ24'34\hbox{$.\!\!^{\prime\prime}$ }6$
* DR21 C is centred on the H II-region. The projected distance of DR21 E (resp. DR21 W)
from position DR21 C is 0.77 pc (resp. 0.89 pc) at a distance of 1.7 kpc.

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