PlanetaryMoon
PlanetaryMoon
Related Interpreter »Natural satellites in the solar system.
Entity["PlanetaryMoon",name] or 
represents an entity of type "PlanetaryMoon".
[prop]
gives the value of a specified property.
[{propi,…}]
gives the value of a list of properties.
[prop,{qualivali,…}]
gives the value of a specified property modified by qualifier rules quali->vali.
[Dated[prop,date]]
gives the value of a property associated with a particular date specification.
EntityClass["PlanetaryMoon",{propispeci,…}]
represents a class of entities with values of propi defined by speci.
Sample Entities
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Sample Entity Classes
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Properties
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AbsoluteMagnitudeH absolute magnitude H Age age Albedo albedo AlphanumericName alphanumeric name AlternateNames alternate names Altitude altitude AltitudeMaximum next maximum altitude AltitudeTransit next transit altitude AngularDiameterFromEarth angular diameter AngularRadiusFromEarth angular radius ApoapsisDistance apoapsis distance ApoapsisTime next apoapsis time ApoapsisTimeLast last apoapsis time ApparentAltitude apparent altitude ApparentMagnitude apparent magnitude AscendingNodeLongitude longitude of ascending node Ω AstroPosition AstroPosition AtmosphericComposition atmospheric composition AtmosphericPressure atmospheric pressure AverageDistanceFromEarth average distance from Earth AverageOrbitalCentripetalForce average orbital centripetal force AverageOrbitDistance average orbit distance AverageOrbitVelocity average orbit velocity AverageTemperature average temperature Azimuth azimuth AzimuthRise azimuth at rise AzimuthSet azimuth at set BondAlbedo bond albedo BooleanRise above the horizon Classes classes Color color Constellation constellation CylindricalEquidistantTexture cylindrical equidistant texture DailyTimeAboveHorizon daily time above horizon Declination declination Density mean density Diameter average diameter Dimensions dimensions Discoverers discoverers DiscoveryDate discovery date DistanceFromEarth distance from Earth DistanceFromSun distance from Sun EccentricAnomaly eccentric anomaly Eccentricity orbital eccentricity EffectiveTemperature effective temperature EntityClasses entity classes EntityTypeList entity type list EquatorialAngularVelocity equatorial angular velocity EquatorialCircumference equatorial circumference EquatorialDiameter equatorial diameter EquatorialDiameterAlongOrbit equatorial diameter along orbit EquatorialDiameterTowardPlanet equatorial diameter toward planet EquatorialFrequency equatorial frequency EquatorialRadius equatorial radius EquatorialRadiusAlongOrbit equatorial radius along orbit EquatorialRadiusTowardPlanet equatorial radius toward planet EscapeVelocity escape velocity FarthestPlanet farthest planet GalacticLatitude galactic latitude GalacticLongitude galactic longitude GeocentricEclipticLatitude geocentric ecliptic latitude GeocentricEclipticLongitude geocentric ecliptic longitude GravitationalConstantMassProduct gravitational constant mass product Gravity gravity GreenwichHourAngle Greenwich hour angle HeliocentricEclipticLatitude heliocentric ecliptic latitude HeliocentricEclipticLongitude heliocentric ecliptic longitude HelioCoordinates heliocentric ecliptic XYZ coordinates HillRadius Hill radius Image image Inclination orbital inclination LocalHourAngle local hour angle MajorAxis orbital major axis Mass mass MaximalAltitudeTime next maximum altitude time MaximumOrbitalCentripetalForce maximum orbital centripetal force MaximumTemperature maximum temperature MinimumOrbitalCentripetalForce minimum orbital centripetal force MinimumTemperature minimum temperature MinorAxis orbital minor axis MomentOfInertia rotational moment of inertia NAIFIdentifier NAIF identifier Name name NearestPlanet nearest planet ObjectType object type Obliquity obliquity OrbitalAngularMomentum orbital angular momentum OrbitalCentripetalForce orbital centripetal force OrbitalKineticEnergy orbital kinetic energy OrbitalMomentOfInertia orbital moment of inertia OrbitCenter orbit center OrbitCircumference orbit circumference OrbitPeriod orbital period PeriapsisArgument argument of periapsis ω PeriapsisDistance periapsis distance PeriapsisTime next periapsis time PeriapsisTimeLast last periapsis time PolarDiameter polar diameter PolarRadius polar radius Radius average radius RetrogradeApparentMotionQuery apparent direction RightAscension right ascension RiseTime next rise RocheLimit Roche limit RotationalAngularMomentum rotational angular momentum RotationPeriod rotation period SemimajorAxis orbital semimajor axis SemiminorAxis orbital semiminor axis SetTime next set Shape shape SiderealHourAngle sidereal hour angle SolarDay solar day SolidAngleFromEarth solid angle StationaryOrbitRadius stationary orbit radius StationaryOrbitSpeed stationary orbit speed SunElongation elongation from the Sun SurfaceArea surface area TexturedSurface 3D graphic TransitTime next transit time TrueAnomaly true anomaly VelocityAroundOrbitCenter instantaneous orbit velocity Volume volume ZenithAngle zenith angle
Details
- "PlanetaryMoon" entities include the natural satellites of all eight planets recognized by the International Astronomical Union, as well as natural satellites of some minor planets such as Pluto or Eris in the Kuiper Belt.
- "PlanetaryMoon" entity classes primarily cover sets of satellites orbiting a common central body, and more generally sets of satellites sharing a common defining feature, such as the Galilean moons of Jupiter and retrograde moons.
- Some properties are available for the "PlanetaryMoon" entity type as a whole and can be given using the form EntityValue["PlanetaryMoon",property]. Such properties include:
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"Properties" the list of available properties "PropertyCanonicalNames" the standard names of available properties "SampleEntities" a sample list of available entities (typically of length 10) "SampleEntityClasses" a sample list of available entity classes (typically of length 10) "EntityCount" number of entities available "Entities" the list of available entities "EntityCanonicalNames" the standard names of available entities "EntityClasses" the list of available entity classes "EntityClassCanonicalNames" the standard names of available entity classes "PropertyClasses" the list of available property classes "PropertyClassCanonicalNames" the standard names of available property classes "PropertyCount" number of properties available - The following annotations can be used in the third argument of EntityValue["PlanetaryMoon",property,annotation]:
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"Source" source information for the property "Date" the date associated with the entity-property value (if any) "EntityAssociation" an association of entities and entity-property values "PropertyAssociation" an association of properties and entity-property values "EntityPropertyAssociation" an association in which the specified entities are keys, and values are a nested association of properties and entity-property values "PropertyEntityAssociation" an association in which the specified properties are keys, and values are a nested association of entities and entity-property values "Dataset" a dataset in which the specified entities are keys, and values are an association of property names and entity-property values - The following annotations can be used in the second argument of EntityValue[property,annotation]:
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"Qualifiers" the list of possible qualifiers for the property "QualifierValues" the list of possible values that can be given to each qualifier "DefaultQualifierValues" the list of default values for the property's qualifiers "Description" a brief textual description of the property "Definition" a detailed textual definition of the property "PhysicalQuantity" the physical quantity associated with the entity-property value "Unit" the unit associated with the entity-property value - A qualifier value of Automatic indicates that an applicable format of values can be used; e.g. for the "Date" qualifier, this includes a proper date or date span.
Examples
open all close allBasic Examples (4)
for entity discovery:["Ganymede"]Find a property value for an entity:
Entity["PlanetaryMoon", "Phobos"]["Mass"]Retrieve a dataset of all available properties for an entity:
Entity["PlanetaryMoon", "Io"]["Dataset"]Find the three most massive moons:
EntityClass["PlanetaryMoon", {"Mass" -> TakeLargest[3]}]//EntityListScope (9)
Look up the orbit periods of the moons of Neptune:
EntityValue[["moons of neptune"], "OrbitPeriod", "EntityAssociation"]The known satellites of Neptune:
EntityList[EntityClass["PlanetaryMoon", "NeptuneMoon"]]EntityValue[%, "Diameter"]EntityValue[%%, "SemimajorAxis"]The minor planet Eris has one known satellite:
Entity["MinorPlanet", "Eris"]["Satellites"]EntityValue[%, "Diameter"]EntityValue[%%, "SemimajorAxis"]Location qualifiers can accept an explicit GeoPosition, location-based Entity objects or queries that evaluate to one of these:
EntityValue[Entity["PlanetaryMoon", "Moon"], EntityProperty["PlanetaryMoon", "RiseTime", {"Location" -> #}]& /@ {GeoPosition[{40.1, -88.2}], ["Joplin"], ["capital city of Iowa"]}]Implicit Entity Classes (1)
Property Classes (1)
Represent equatorial coordinate properties associated with moons:
EntityPropertyClass["PlanetaryMoon", "EquatorialCoordinates"]Get a list of available property classes for moons:
EntityValue["PlanetaryMoon", "PropertyClasses"]Find the list of properties included in a property class:
EntityPropertyClass["PlanetaryMoon", "EquatorialCoordinates"]["Properties"]Obtain the property values for the properties in a property class for an entity:
EntityValue[Entity["PlanetaryMoon", "Ganymede"], EntityPropertyClass["PlanetaryMoon", "EquatorialCoordinates"]]Qualifiers (2)
Some properties accept qualifiers:
EntityValue[EntityProperty["PlanetaryMoon", "Constellation"], "Qualifiers"]EntityValue[EntityProperty["PlanetaryMoon", "RiseTime"], "Qualifiers"]The "Location" qualifier, which specifies the location of the observer, can accept an explicit GeoPosition, location-based Entity objects or queries that evaluate to one of these:
EntityValue[Entity["PlanetaryMoon", "Moon"], EntityProperty["PlanetaryMoon", "RiseTime", {"Location" -> #}]& /@ {GeoPosition[{40.1, -88.2}], ["Joplin"], ["capital city of Iowa"]}]Dates (1)
Date qualifiers can accept an explicit DateObject or queries that evaluate to a DateObject:
EntityValue[Entity["PlanetaryMoon", "Moon"], EntityProperty["PlanetaryMoon", "DistanceFromEarth", {"Date" -> #}]& /@ {DateObject[{2014, 4, 9, 22, 0, 0}, "Instant", "Gregorian", -5.], ["birth date of Michael Jackson"]}]Date qualifiers can also be specified using Dated:
EntityValue[Entity["PlanetaryMoon", "Moon"], Dated["DistanceFromEarth", #]& /@ {DateObject[{2014, 4, 9, 22, 0, 0}, "Instant", "Gregorian", -5.], ["birth date of Michael Jackson"]}]Applications (3)
The corresponding plot for all known planetary moons, with a line for each planet:
ListLogLogPlot[EntityValue["PlanetaryMoon", {"OrbitPeriod", "SemimajorAxis"}], AxesLabel -> Automatic]Find the total number of known planetary moons in the solar system:
EntityValue["PlanetaryMoon", "EntityCount"]Make a log-rank plot of the masses of the moons, with names as tooltips:
ListLogPlot[Reverse[Sort[Tooltip@@@EntityValue["PlanetaryMoon", {"Mass", "Name"}]]], AxesLabel -> Automatic]Relations to Other Entity Types (1)
"PlanetaryMoon" entities can be combined with "SolarSystemFeature" entities to create maps with labeled features:
coords = Entity["SolarSystemFeature", "CopernicusMoon"]["Position"];GeoGraphics[{GeoStyling[Red, Opacity[.3]], Red, Point[coords], White, Text[Entity["SolarSystemFeature", "CopernicusMoon"]["Name"], coords, {0, 2}]}, GeoRange -> All, GeoGridLines -> True, Frame -> True, GeoModel -> ["the moon"]]
PlanetaryMoon Source Information