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1862 Apollo
.png) A three-dimensional model of 1862 Apollo based on its light-curve | |||||||||||||||||
| Discovery[1] | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | .svg){kind=small} (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] | ||||||||||||||||
| 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] | |||||||||||||||||
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.
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]
- ^ a b c d Cite error: The named reference
jpldatawas invoked but never defined (see the help page). - ^ "Apollo". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 21 March 2020.
- ^ a b Cite error: The named reference
Gehrelswas invoked but never defined (see the help page). - ^ "Planetary Habitability Calculators". Planetary Habitability Laboratory. University of Puerto Rico at Arecibo. Archived from the original on 11 May 2019. Retrieved 7 December 2015.
- ^ Cite error: The named reference
yorpwas invoked but never defined (see the help page). - ^ Cite error: The named reference
springerwas invoked but never defined (see the help page).
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