Apollo asteroid on:
[Wikipedia]
[Google]
[Amazon]
The Apollo asteroids are a group of near-Earth asteroids named after
List of Apollo minor planets
{{Small Solar System bodies
The Apollo asteroids are a group of near-Earth asteroids named after 1862 Apollo
1862 Apollo is a stony asteroid, approximately 1.5 kilometers in diameter, classified as a near-Earth object (NEO). It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 24 April 1932, but lost and not recovered until ...
, discovered by German astronomer Karl Reinmuth in the 1930s. They are Earth-crossing asteroids that have an orbital semi-major axis
In geometry, the major axis of an ellipse is its longest diameter: a line segment that runs through the center and both foci, with ends at the two most widely separated points of the perimeter. The semi-major axis (major semiaxis) is the lo ...
greater than that of the Earth (a > 1 AU) but perihelion
An apsis (; ) is the farthest or nearest point in the orbit of a planetary body about its primary body. For example, the apsides of the Earth are called the aphelion and perihelion.
General description
There are two apsides in any e ...
distances less than the Earth's aphelion
An apsis (; ) is the farthest or nearest point in the orbit of a planetary body about its primary body. For example, the apsides of the Earth are called the aphelion and perihelion.
General description
There are two apsides in any e ...
distance (q < 1.017 AU).
, the number of known Apollo asteroids is 10,485, making the class the largest group of near-Earth object
A near-Earth object (NEO) is any small Solar System body whose orbit brings it into proximity with Earth. By convention, a Solar System body is a NEO if its closest approach to the Sun (perihelion) is less than 1.3 astronomical units (AU) ...
s (''cf''. the Aten
Aten also Aton, Atonu, or Itn ( egy, jtn, ''reconstructed'' ) was the focus of Atenism, the religious system established in ancient Egypt by the Eighteenth Dynasty pharaoh Akhenaten. The Aten was the disc of the sun and originally an aspect o ...
, Amor
Amor ("love" in Latin, Spanish and Portuguese) may refer to:
Music Albums
* ''Amor'' (Julio Iglesias album), 1982
* ''Amor'' (Andrea Bocelli album), 2006
Songs
* "Amor" (Los Auténticos Decadentes song), 2000
* "Amor" (Cristian Castro song), 199 ...
and Atira asteroids), of which 1,409 are numbered (asteroids are not numbered until they have been observed at two or more oppositions
''Oppositions'' was an architectural journal produced by the Institute for Architecture and Urban Studies from 1973 to 1984. Many of its articles contributed to advancing architectural theory and many of its contributors became distinguished practi ...
), and 1,648 are identified as potentially hazardous asteroids.
The closer their semi-major axis is to Earth's, the less eccentricity is needed for the orbit
In celestial mechanics, an orbit is the curved trajectory of an object such as the trajectory of a planet around a star, or of a natural satellite around a planet, or of an artificial satellite around an object or position in space such a ...
s to cross. The Chelyabinsk meteor
The Chelyabinsk meteor was a superbolide that entered Earth's atmosphere over the southern Ural region in Russia on 15 February 2013 at about 09:20 YEKT (03:20 UTC). It was caused by an approximately near-Earth asteroid that entered the ...
, that exploded over the city of Chelyabinsk
Chelyabinsk ( rus, Челя́бинск, p=tɕɪˈlʲæbʲɪnsk, a=Ru-Chelyabinsk.ogg; ba, Силәбе, ''Siläbe'') is the administrative center and largest city of Chelyabinsk Oblast, Russia. It is the seventh-largest city in Russia, with a ...
in the southern Urals region of Russia on February 15, 2013, injuring an estimated 1,500 people with flying glass from broken windows, was an Apollo-class asteroid
An asteroid is a minor planet of the Solar System#Inner solar system, inner Solar System. Sizes and shapes of asteroids vary significantly, ranging from 1-meter rocks to a dwarf planet almost 1000 km in diameter; they are rocky, metallic o ...
.
List
The largest known Apollo asteroid is 1866 Sisyphus, with a diameter of about 8.5 km. Examples of known Apollo asteroids include:See also
* Alinda group * Amor asteroid * Apollo asteroids (category) *Apollo asteroid records The following is a list of current records for Apollo asteroids.
Discovery records
* 1st Discovered: 1862 Apollo (1932)
Size records
* Largest: 1866 Sisyphus
1866 Sisyphus is a binary stony asteroid, near-Earth object and the largest memb ...
* Aten asteroid
* List of minor planets
*2020 PP1
is a sub-kilometer asteroid, classified as a near-Earth object of the Apollo group, that is a temporary quasi-satellite of the Earth. There are over a dozen known Earth quasi-satellites, some of which switch periodically between the quasi-satel ...
References
External links
List of Apollo minor planets
{{Small Solar System bodies
Apollo
Apollo, grc, Ἀπόλλωνος, Apóllōnos, label=genitive , ; , grc-dor, Ἀπέλλων, Apéllōn, ; grc, Ἀπείλων, Apeílōn, label=Arcadocypriot Greek, ; grc-aeo, Ἄπλουν, Áploun, la, Apollō, la, Apollinis, label= ...