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What are Properties? Properties

Property ID Expected Type Description

This type doesn't have any properties

Category /astronomy/celestial_object/category /astronomy/celestial_object_category

The category of object this is. (E.g., galaxy, nebula, star, asteroid, etc.)

master, disambiguating
Age /astronomy/celestial_object/celestial_age /astronomy/celestial_object_age mediator

The apparent age of the celestial object in millions of years.

unique
Apparent Magnitude /astronomy/celestial_object/magnitude /type/float never_assert

Apparent magnitude of the object, the measurement of its brightness as seen by an observer on Earth, normalized to the value absent any atmosphere. The brighter the object, the lower the value (Sun has an apparent magnitude of -26.74).

unique
Absolute Magnitude /astronomy/celestial_object/absolute_magnitude /type/float never_assert

For stars and galaxies, this is the measure of an object's brightness derived from an adjusted apparent magnitude if the object were observed at a fixed distance of 10 parsecs with no appreciable intervening dust or other light-absorbing material. Objects in the Solar System (other than the Sun) should use the "absolute magnitude" property on the type "Star System Object", since it is a different measurement.

unique
Declination /astronomy/celestial_object/decllnation /type/float never_assert °

Declination (abbrev. dec or δ) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. Declination in astronomy is comparable to geographic latitude, but projected onto the celestial sphere. Declination is measured in degrees north and south of the celestial equator. Points north of the celestial equator have positive declinations, while those to the south have negative declinations. Please enter as a decimal value for the degree value.

unique
Right Ascension /astronomy/celestial_object/right_ascention /type/float never_assert °

Right ascension is the celestial equivalent of terrestrial longitude. Both right ascension and longitude measure an angle that increases toward the east as measured from a zero point on an equator. For longitude, the zero point is the Prime Meridian on the geographic equator; for right ascension, the zero point is known as the first point of Aries, which is the place in the sky where the Sun crosses the celestial equator at the March equinox. The value entered should be the decimal equivalent of degrees.

unique
Distance /astronomy/celestial_object/cosmological_distance /type/float never_assert pc

The best approximated measurement from the earth to the object in parsecs.

unique
Hipparcos Catalog Number /astronomy/celestial_object/hipparcos_catalog_number /type/int never_assert

This catalog contains 118,218 stars that were observed by the European Space Agency's Hipparcos Satellite from late 1989 to 1993. The Hipparcos Catalog Data is purely based on observations performed in space, except for the global orientation of its refrence frame which was adjusted to the existing system by a variety of mainly ground-based techniques.

unique
Color Index /astronomy/celestial_object/color_index /type/float never_assert

The color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature. To measure the index, one observes the magnitude of an object successively through two different filters, such as U and B, or B and V, where U is sensitive to ultraviolet rays, B is sensitive to blue light, and V is sensitive to visible (green-yellow) light.

unique
Red Shift /astronomy/celestial_object/red_shift /astronomy/red_shift mediator

The apparent velocity in kilometers of the object traveling away (or towards) the observing location (Earth)

unique
Locations /astronomy/celestial_object/locations /astronomy/extraterrestrial_location

Named locations on this object, such as craters, mountains, vortices, etc.

reverse
Artificial satellites /astronomy/celestial_object/artificial_satellites /spaceflight/satellite

Artificial satellites in orbit around this body.

reverse
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What are Included Types? Included Types

This type doesn't have any included types.

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Incoming Properties

Originating Type Property
Extraterrestrial location
/astronomy/extraterrestrial_location
On celestial object
/astronomy/extraterrestrial_location/on_celestial_object
Celestial object category
/astronomy/celestial_object_category
Objects
/astronomy/celestial_object_category/objects
Asterism
/astronomy/asterism
Stars
/astronomy/asterism/stars

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