hasObservationRequirement
P104432
predicate
Indicates that one entity imposes or specifies an observation-related condition or requirement that must be satisfied by another entity or process.
Observed surface forms (2)
- requiresForObservation ×5
- observingRequirement ×3
Sample triples (12)
| Subject | Object |
|---|---|
| Butterfly Cluster | dark skies recommended via predicate surface "observingRequirement" ⓘ |
| C 74 | dark skies preferred ⓘ |
| C 74 | moderate magnification ⓘ |
| Caldwell 20 | dark skies for best visibility via predicate surface "observingRequirement" ⓘ |
|
planetaryNebula IC 1295
surface form:
IC 1295
|
dark skies ⓘ |
|
planetaryNebula IC 1295
surface form:
IC 1295
|
moderate to large telescopes ⓘ |
| Medusa Nebula | dark skies via predicate surface "requiresForObservation" ⓘ |
| Medusa Nebula | moderate to large amateur telescope via predicate surface "requiresForObservation" ⓘ |
| Pelican Nebula | dark skies via predicate surface "requiresForObservation" ⓘ |
| Pelican Nebula | hydrogen-alpha filter via predicate surface "requiresForObservation" ⓘ |
| Pelican Nebula | wide-field telescope via predicate surface "requiresForObservation" ⓘ |
| openCluster M41 | visible to naked eye under good conditions via predicate surface "observingRequirement" ⓘ |