Property talk:P4501

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albedo
ratio of reflected radiation to incident radiation

Description	ratio of reflected radiation to incident radiation
Represents	albedo (Q101038)
Data type	Quantity
Template parameter	« albédo » in fr:Modèle:Infobox_Planète_mineure
Domain	surface of any material (note: this should be moved to the property statements)
Allowed units	According to this template: there is no unit (ratio) According to statements in the property: not applicable When possible, data should only be stored as statements
Example	Saturn (Q193) → 0.47 Ceres (Q596) → 0.09
Format and edit filter validation	a qualifier should mention if the albedo is geometric albedo (Q2832068) or Bond albedo (Q2731139), if not, it could appear as an error to fix for other contributors
Source	http://www.sciencedirect.com/science/article/pii/S0019103506000054
Tracking: usage	Category:Pages using Wikidata property P4501 (Q43543549)
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Chart by item creation date Minimum and maximum Items with highest numeric value Items with lowest numeric value Database reports/Constraint violations/P4501 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 40,880 Main statement 40,876 >99.9% of uses Qualifier 4 <0.1% of uses

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Conflicts with “subclass of (P279)”: this property must not be used with the listed properties and values. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P4501#Conflicts with P279, SPARQL

Item “parent astronomical body (P397)”: Items with this property should also have “parent astronomical body (P397)”. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). Known exceptions: 1I/ʻOumuamua (Q42313338)
List of violations of this constraint: Database reports/Constraint violations/P4501#Item P397, SPARQL

Units: “novalue”: value unit must be one of listed. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P4501#Units

Scope is as main value (Q54828448): the property must be used by specified way only (Help)

List of violations of this constraint: Database reports/Constraint violations/P4501#Scope, hourly updated report, SPARQL

Required qualifier “criterion used (P1013)”: this property should be used with the listed qualifier. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P4501#mandatory qualifier, SPARQL

This property is being used by: la:Formula:Capsa asteroidis Vicidata, la:Formula:Capsa satellitis Vicidata pt:Predefinição:Info/Asteroide, pt:Predefinição:Info/Asteroide/Testes be:Шаблон:Малая планета ast:Plantía:Ficha d'oxetu celeste eu:Txantiloi:Astronomia infotaula, eu:Txantiloi:Objektu astronomiko infotaula ca:Plantilla:Infotaula satèl·lit, ca:Plantilla:Infotaula d'objecte astronòmic be-x-old:Шаблён:Плянэта ha:Template:Infobox astronomical object incubator:Template:Wp/shi/Infobox astronomical object kab:Talɣa:Infobox astronomical object az:Şablon:Planet 2, az:Şablon:Planet shi:Talɣa:Infobox astronomical object hu:Sablon:Égitest infobox be-tarask:Шаблён:Плянэта eo:Ŝablono:Informkesto astronomia objekto Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)