Assertion: planet's satellite | /r/CapableOf | ought to be visible
Facets:
value: at first magnitude
type: OTHER
value: at perigee
type: LOCATION
Source sentences:
text: In addition, from Bargby’s own claimed observations it can be deduced that when at perigee Bargby’s satellites ought to be visible at first magnitude and thus be easily visible to the unaided eye, yet no-one has seen them as such.