Assertion: astronomer's time | /r/HasProperty | accurate
Facets:
value: to a second
type: OTHER
value: to the leading or trailing edge
type: OTHER
Source sentences:
text: The algorithms used on this site take the atmospheric refraction and the diameter of the sun into account so the times should be accurate to the leading or trailing edge passing the horizon.
text: Because these factors are always changing it makes no sense to claim that the times are accurate to a second.