Comet
Related Interpreter »Comets in our solar system.
[prop]
gives the value of a specified property.
[{prop1,…}]
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["Comet",{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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Age age AlphanumericName alphanumeric name AlternateNames alternate names Altitude altitude AngularDiameterFromEarth angular diameter AngularRadiusFromEarth angular radius Aphelion largest distance from the Sun Apoapsis largest distance from Sun ApoapsisTime next apoapsis time ApoapsisTimeLast last apoapsis time ApparentAltitude apparent altitude ApparentMagnitude apparent magnitude AscendingNodeLongitude longitude of ascending node Ω AverageDistanceFromEarth average distance from Earth AverageOrbitalCentripetalForce average orbital centripetal force AverageOrbitDistance average orbit distance AverageOrbitVelocity average orbit velocity AverageVelocityAroundSun average heliocentric velocity Azimuth azimuth BooleanRise above the horizon Classes classes Constellation constellation DailyTimeAboveHorizon daily time above horizon Declination declination DestructionDate destruction date Diameter average diameter DiscoveryDate discovery date DistanceFromEarth distance from Earth DistanceFromSun distance from Sun EarthMOID Earth minimum orbit intersection distance EccentricAnomaly eccentric anomaly Eccentricity orbital eccentricity EntityClasses entity classes EntityTypeList entity type list EquatorialDiameter equatorial diameter EquatorialRadius equatorial radius FarthestPlanet farthest planet GalacticLatitude galactic latitude GalacticLongitude galactic longitude GeocentricEclipticLatitude geocentric ecliptic latitude GeocentricEclipticLongitude geocentric ecliptic longitude GravitationalConstantMassProduct gravitational constant mass product GreenwichHourAngle Greenwich hour angle HeliocentricEclipticLatitude heliocentric ecliptic latitude HeliocentricEclipticLongitude heliocentric ecliptic longitude HelioCoordinates heliocentric XYZ coordinates HelioVelocityVector heliocentric velocity vector IAUName IAU name Image image Inclination orbital inclination LocalHourAngle local hour angle MajorAxis orbital major axis MaximalAltitudeTime next maximum altitude time MaximumOrbitalCentripetalForce maximum orbital centripetal force MeanAnomaly mean anomaly MeanMotion mean motion MinimumOrbitalCentripetalForce minimum orbital centripetal force MinorAxis orbital minor axis Name name NearestPlanet nearest planet NuclearMagnitudeParameter nuclear magnitude parameter NuclearMagnitudeSlopeParameter nuclear magnitude slope parameter ObjectType object type OppositionTimeLast last opposition time OppositionTimeNearest nearest opposition time OppositionTimeNext next opposition time OrbitalCentripetalForce orbital centripetal force OrbitCenter orbit center OrbitCircumference orbit circumference OrbitPath orbit path OrbitPeriod orbital period OrbitRules orbit rules Periapsis smallest distance from Sun PeriapsisArgument argument of periapsis ω PeriapsisLongitude longitude of periapsis ϖ PeriapsisTime next periapsis time PeriapsisTimeLast last periapsis time Perihelion nearest distance from the Sun PrimaryDesignation primary designation Radius average radius RetrogradeApparentMotionQuery apparent direction RightAscension right ascension RiseTime next rise RotationPeriod rotation period SemimajorAxis orbital semimajor axis SemiminorAxis orbital semiminor axis SetTime next set Shape shape SiderealHourAngle sidereal hour angle SolarConjunctionTimeLast last solar conjunction time SolarConjunctionTimeNearest nearest solar conjunction time SolarConjunctionTimeNext next solar conjunction time SolarDay solar day SphereOfInfluenceRadius sphere of influence radius SurfaceArea surface area TotalMagnitudeParameter total magnitude parameter TotalMagnitudeSlopeParameter total magnitude slope parameter TrueAnomaly true anomaly VelocityAroundSun instantaneous heliocentric velocity Volume volume ZenithAngle zenith angle
Details
- "Comet" entities include a subset of modern and historical comets that have been observed.
- "Comet" entity classes include groups based on orbit type, but also groups based on definitions such as "great comets".
- Due to the fact that most comets have never been visited directly by spacecraft, most available data is focused on orbital parameters. Physical properties such as mass and radius are more sparse.
- Some properties are available for the "Comet" entity type as a whole and can be given using the form EntityValue["Comet",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["Comet",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 allclose allBasic Examples (7)
for discovery:Scope (4)
Implicit Entity Classes (1)
Property Classes (1)
Qualifiers (2)
Some properties accept 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:
Dates (1)
Date qualifiers can accept an explicit DateObject or queries that evaluate to a DateObject:
Date qualifiers can also be specified using Dated:
Comet Source Information