which observatory was (21152) 1993 mb1 discovered at
which observatory was (21152) 1993 MB1 discovered at
SELECT DISTINCT ?j WHERE { resource:Q4542221 property:P65 ?j }
SELECT DISTINCT ?j WHERE { resource:(21152)_1993_MB1 property:site_of_astronomical_discovery ?j }
(21152) 1993 MB1
Palomar Observatory