Property talk:P3891

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observing time available
amount of observing time available at a telescope (or other instrument)

Description	The amount of observing time available at a telescope (or other instrument)
Represents	telescope time (Q3517769)
Data type	Quantity
Template parameter	obs-time in en:template:infobox telescope (to replace existing "weather" parameter)
Domain	According to this template: Telescopes, but also any other instrument with limited use time available According to statements in the property: appliance (Q1183543) or observatory (Q62832) When possible, data should only be stored as statements
Allowed values	0 ≤ 𝓧 ≤ 365.25
Allowed units	According to this template: Common temporal units, for example minute (Q7727), hour (Q25235), day (Q573). Also units of time unit per time unit, such as nights per year (Q29463499), hour per year (Q29463526) According to statements in the property: nights per year (Q29463499) When possible, data should only be stored as statements
Example	McMath–Pierce Solar Telescope (Q56901) → 263 nights per year
Tracking: usage	Category:Pages using Wikidata property P3891 (Q29575766)
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) Minimum and maximum Items with highest numeric value Items with lowest numeric value Database reports/Constraint violations/P3891 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 11 Main statement 10 90.9% of uses Qualifier 1 9.1% of uses

[create Create a translatable help page (preferably in English) for this property to be included here]

Item “instance of (P31)”: Items with this property should also have “instance of (P31)”. (Help)

List of violations of this constraint: Database reports/Constraint violations/P3891#Item P31, hourly updated report, SPARQL

Units: “nights per year (Q29463499)”: 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/P3891#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/P3891#Scope, hourly updated report, SPARQL

Range from “0” to “365.25”: values should be in the range from “0” to “365.25”. (Help)

List of violations of this constraint: Database reports/Constraint violations/P3891#Range, hourly updated report

Type “appliance (Q1183543), observatory (Q62832)”: item must contain property “instance of (P31)” with classes “appliance (Q1183543), observatory (Q62832)” or their subclasses (defined using subclass of (P279)). (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/P3891#Type Q1183543, Q62832, SPARQL

This property is being used by: pt:Predefinição:Info/Telescópio/Testes as:সাঁচ:Infobox telescope be-x-old:Шаблён:Тэлескоп, be-x-old:Шаблён:Абсэрваторыя no:Mal:Infoboks teleskop sd:سانچو:Infobox Observatory eu:Txantiloi:Teleskopio infotaula cs:Šablona:Infobox - dalekohled, cs:Šablona:Infobox - observatoř be-tarask:Шаблён:Абсэрваторыя, be-tarask:Шаблён:Тэлескоп Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)