Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
photometric system
|
| gptkbp:alsoKnownAs |
gptkb:UBV_system
|
| gptkbp:B_filter_wavelength |
~440 nm
|
| gptkbp:basisFor |
many modern photometric systems
|
| gptkbp:colorIndices |
gptkb:B-V
gptkb:U-B |
| gptkbp:extendsTo |
R and I filters (UBVRI system)
|
| gptkbp:focusArea |
gptkb:B_filter
gptkb:U_filter gptkb:V_filter |
| https://www.w3.org/2000/01/rdf-schema#label |
Johnson photometric system
|
| gptkbp:introducedIn |
1953
|
| gptkbp:inventedBy |
gptkb:William_Wilson_Morgan
gptkb:Harold_Lester_Johnson |
| gptkbp:measures |
stellar magnitudes
|
| gptkbp:purpose |
classification of stars
|
| gptkbp:referenceStar |
gptkb:Vega
|
| gptkbp:standardizedBy |
color indices
|
| gptkbp:U_filter_wavelength |
~365 nm
|
| gptkbp:usedIn |
gptkb:astronomy
|
| gptkbp:V_filter_wavelength |
~550 nm
|
| gptkbp:bfsParent |
gptkb:UBV_photometric_system
|
| gptkbp:bfsLayer |
6
|