1862 Apollo
Stony asteroid / From Wikipedia, the free encyclopedia
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1862 Apollo /əˈpɒloʊ/ 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 1973.
Discovery[1] | |||||||||||||||||
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Discovered by | K. Reinmuth | ||||||||||||||||
Discovery site | Heidelberg Obs. | ||||||||||||||||
Discovery date | 24 April 1932 | ||||||||||||||||
Designations | |||||||||||||||||
(1862) Apollo | |||||||||||||||||
Pronunciation | /əˈpɒloʊ/[2] | ||||||||||||||||
Named after | Apollo (Greek mythology) | ||||||||||||||||
1932 HA | |||||||||||||||||
NEO · PHA Venus-crosser Mars-crosser Apollo asteroids | |||||||||||||||||
Symbol | (astrological) | ||||||||||||||||
Orbital characteristics[1] | |||||||||||||||||
Epoch 29 December 2009 (JD 2455194.5) | |||||||||||||||||
Uncertainty parameter 0 | |||||||||||||||||
Observation arc | 85.32 yr (31162 days) | ||||||||||||||||
Earliest precovery date | 13 December 1930 | ||||||||||||||||
Aphelion | 2.2935 AU (343.10 Gm) | ||||||||||||||||
Perihelion | 0.64699 AU (96.788 Gm) | ||||||||||||||||
1.4702 AU (219.94 Gm) | |||||||||||||||||
Eccentricity | 0.55994 | ||||||||||||||||
1.78 yr (651.15 d) | |||||||||||||||||
144.22° | |||||||||||||||||
0° 33m 10.332s / day | |||||||||||||||||
Inclination | 6.3530° | ||||||||||||||||
35.739° | |||||||||||||||||
285.85° | |||||||||||||||||
Earth MOID | 0.0257026 AU (3.84505 Gm) | ||||||||||||||||
Jupiter MOID | 3.06837 AU (459.022 Gm) | ||||||||||||||||
TJupiter | 4.415 | ||||||||||||||||
Physical characteristics | |||||||||||||||||
Dimensions | 1.5 km (0.93 mi)[3] | ||||||||||||||||
Mean radius | 0.75 km | ||||||||||||||||
3.065 h (0.1277 d) | |||||||||||||||||
0.25[1][3] | |||||||||||||||||
| |||||||||||||||||
Q (Tholen, SMASS) B–V = 0.819 U–B = 0.481 | |||||||||||||||||
16.25[1] | |||||||||||||||||
It is the namesake and the first recognized member of the Apollo asteroids, a subgroup of NEOs which are Earth-crossers, that is, they cross the orbit of the Earth when viewed perpendicularly to the ecliptic plane (crossing an orbit is a more general term than actually intersecting it). In addition, since Apollo's orbit is highly eccentric, it crosses the orbits of Venus and Mars and is therefore called a Venus-crosser and Mars-crosser as well.
Although Apollo was the first Apollo asteroid to be discovered, its official IAU-number (1862) is higher than that of some other Apollo asteroids such as 1566 Icarus, due to the fact that it was a lost asteroid for more than 40 years and other bodies were numbered in the meantime. The analysis of its rotation provided observational evidence of the YORP effect.[5]
It is named after the Greek god Apollo. He is the god of the Sun, child of Zeus and Leto, after which the minor planets 5731 Zeus and 68 Leto are named.[6]