provisional designation
Provisional designation in astronomy is the naming convention applied to astronomical objects immediately following their discovery. The provisional designation is usually superseded by a permanent designation once a reliable orbit has been calcu ...
) is a sub-kilometer
asteroid
An asteroid is a minor planet—an object larger than a meteoroid that is neither a planet nor an identified comet—that orbits within the Solar System#Inner Solar System, inner Solar System or is co-orbital with Jupiter (Trojan asteroids). As ...
, classified as
near-Earth object
A near-Earth object (NEO) is any small Solar System body orbiting the Sun whose closest approach to the Sun ( perihelion) is less than 1.3 times the Earth–Sun distance (astronomical unit, AU). This definition applies to the object's orbit a ...
and
potentially hazardous asteroid
A potentially hazardous object (PHO) is a near-Earth object – either an asteroid or a comet – with an orbit that can make close approaches to the Earth and which is large enough to cause significant regional damage in the event of impact. Th ...
of the
Apollo group
Apollo Education Group, Inc. is an American corporation based in the South Phoenix area of Phoenix, Arizona, with an additional corporate office in Chicago, Illinois. It is privately-owned by a consortium of investors including The Vistria Grou ...
. It is a
quasi-satellite
A quasi-satellite is an object in a specific type of co-orbital configuration (1:1 orbital resonance) with a planet (or dwarf planet) where the object stays close to that planet over many orbital periods.
A quasi-satellite's orbit around the Sun ...
of
Earth
Earth is the third planet from the Sun and the only astronomical object known to Planetary habitability, harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all ...
until around 2600.
On 14 April 2004 (with less than a 1-day
observation arc
In observational astronomy, the observation arc (or arc length) of a Solar System body is the time period between its earliest and latest observations, used for tracing the body's path. It is usually given in days or years. The term is mostly use ...
), the
Sentry Risk Table
Sentry is an automated impact prediction system started in 2002 and operated by the Center for Near Earth Object Studies (CNEOS) at NASA's Jet Propulsion Laboratory. It continually monitors the most up-to-date asteroid catalog for possibilities ...
showed 180 virtual impactors. It was removed from the Sentry Risk Table 2 days later on 16 April 2004. Cardea now has a well determined orbit with an observation arc of 12 years.
Discovery and naming
This asteroid was discovered on 13 April 2004 by the
Lincoln Near-Earth Asteroid Research
The Lincoln Near-Earth Asteroid Research (LINEAR) project is a collaboration of the United States Air Force, NASA, and the Massachusetts Institute of Technology's Lincoln Laboratory for the systematic detection and tracking of near-Earth object ...
project near
Socorro, New Mexico
Socorro (, ''Help:Pronunciation respelling key, sÉ™-KOR-oh'') is a city in Socorro County, New Mexico, Socorro County in the U.S. state of New Mexico. It is in the Middle Rio Grande Valley AVA, Rio Grande Valley at an elevation of . At the 2020 ...
and given the
provisional designation
Provisional designation in astronomy is the naming convention applied to astronomical objects immediately following their discovery. The provisional designation is usually superseded by a permanent designation once a reliable orbit has been calcu ...
. Following the naming of 524522 Zoozve, a quasi-satellite of Venus,
Radiolab
''Radiolab'' is a radio program and podcast produced by WNYC, a public radio station based in New York City, and broadcast on more than 570 public radio stations in the United States. The show has earned many industry awards for its "imaginati ...
and the
International Astronomical Union
The International Astronomical Union (IAU; , UAI) is an international non-governmental organization (INGO) with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and developmen ...
held a public naming campaign for this quasi-satellite from June to September 2024. Seven finalist names were revealed in December 2024, with the names being
Bakunawa
The Bakunawa, also called the Philippine moon-eating dragon, the Philippine moon dragon, moon dragon, or the moon-eating dragon, is a serpent, that looks like a Dragon in Philippine mythology. It is believed to be the cause of eclipses, earthqu ...
,
Cardea
Cardea or Carda was the ancient Roman goddess of the hinge (Latin ''cardo, cardinis''), Roman doors being hung on pivot hinges. The Augustan poet Ovid conflates her with another archaic goddess named Carna, whose festival was celebrated on the ...
Enkidu
Enkidu ( ''EN.KI.DU10'') was a legendary figure in Mesopotamian mythology, ancient Mesopotamian mythology, wartime comrade and friend of Gilgamesh, king of Uruk. Their exploits were composed in Sumerian language, Sumerian poems and in the Akk ...
,
Ótr
In Norse mythology, Otr (Old Norse: ; alternately: Ott, Oter, Ottar, Ottarr, Otter) is a Norse dwarves, dwarf. He is the son of the king Hreidmar and the brother of Fafnir and Regin.
According to the Prose Edda, Otr could Shapeshifting#Norse, cha ...
, Tarriaksuk, and Tecciztecatl. The winning name was Cardea, the Roman goddess of the hinge. The name was announced by the
International Astronomical Union
The International Astronomical Union (IAU; , UAI) is an international non-governmental organization (INGO) with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and developmen ...