Mars trojan

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Template:Short description

File:Minor Planets - Martian L5.svg
The Template:L5 group (shown in green) and the Template:L4 group (light blue) of Mars and Jupiter trojan asteroids shown along with the orbits of Jupiter and the inner planets. Mars is shown in red. The outer orbit is that of Jupiter.
File:Animation of 1999 UJ7 relative to Sun and Mars 1600-2500.gif
Animation of 1999 UJ7 relative to Sun and Mars 1600-2500
#REDIRECT Template:Legend inline · #REDIRECT Template:Legend inline · #REDIRECT Template:Legend inline
File:Animation of 2007 NS2 relative to Sun and Mars 1600-2500.gif
Animation of 2007 NS2 relative to Sun and Mars 1600-2500
#REDIRECT Template:Legend inline · #REDIRECT Template:Legend inline · #REDIRECT Template:Legend inline

The Mars trojans are a group of trojan objects that share the orbit of the planet Mars around the Sun. They can be found around the two Lagrangian points 60° ahead of and behind Mars. The origin of the Mars trojans is not well understood. One theory suggests that they were primordial objects left over from the formation of Mars that were captured in its Lagrangian points as the Solar System was forming. However, spectral studies of the Mars trojans indicate this may not be the case.[1][2] Another explanation involves asteroids chaotically wandering into the Mars Lagrangian points later in the Solar System's formation. This is also questionable considering the short dynamical lifetimes of these objects.[3][4] The spectra of Eureka and two other Mars trojans indicates an olivine-rich composition.[5] Since olivine-rich objects are rare in the asteroid belt it has been suggested that some of the Mars trojans are captured debris from a large orbit-altering impact on Mars when it encountered a planetary embryo.[6][3]

Presently, this group contains 17 asteroids confirmed to be stable Mars trojans by long-term numerical simulations but only nine of them are accepted by the Minor Planet Center.[7][3][4][8][9][10][11]

Due to close orbital similarities, most of the smaller members of the L5 group are hypothesized to be fragments of Eureka that were detached after the YORP effect accelerated Eureka's rotational period to the present 2.69 hours. The L4 trojan 1999 UJ7 has a much longer rotational period of ~50 h, apparently due to a chaotic rotation that prevents YORP spinup.[12] The spectrum of 121514 show a certain resemblance to that of 2023 FW14 and a common origin cannot be discarded.[13] The spectra of 121514 and 2023 FW14 are very different from those of the Eureka asteroid family members.

List of Mars trojans
Designation Cloud Semimajor axis
(AU) 		Perihelion
(AU) 		Eccentricity Inclination
(°) 		(H) Diameter
(m)
5261 Eureka L5 1.52356 1.42477 0.06484 20.2820 16.13 Script error: No such module "val".
Template:Mpl L5 1.52429 1.37150 0.10024 31.2987 17.26 Script error: No such module "val".
Template:Mpl L4 1.52455 1.46491 0.03912 16.7493 17.19 Script error: No such module "val".
Template:Mpl L5 1.52379 1.44155 0.05397 18.6194 18.18 Script error: No such module "val".
Template:Mpl L5 1.52385 1.47111 0.03461 24.4006 18.89 Script error: No such module "val".
2009 SE L5 1.52451 1.42524 0.06512 20.6263 19.9 Script error: No such module "val".
Template:Mpl L5 1.52391 1.34938 0.11453 21.4953 19.5 Script error: No such module "val".
Template:Mpl L5 1.52386 1.46247 0.04029 19.8994 20.9 Script error: No such module "val".
Template:Mpl L5 1.52390 1.45678 0.04405 18.7451 19.4 Script error: No such module "val".
Template:Mpl L5 1.52378 1.42521 0.06469 20.3635 19.7 Script error: No such module "val".
Template:Mpl L5 1.52370 1.41550 0.07101 24.3023 19.9 Script error: No such module "val".
Template:Mpl L5 1.52299 1.38650 0.08962 18.7202 20.39 Script error: No such module "val".
Template:Mpl L5 1.52365 1.43425 0.05867 23.1314 19.4 Script error: No such module "val".
Template:Mpl L5 1.52365 1.43138 0.06056 21.8362 20.0 Script error: No such module "val".
Template:Mpl L5 1.52388 1.49781 0.01711 22.1466 21.2 Script error: No such module "val".
Template:Mpl L5 1.52391 1.45196 0.04722 21.5004 21.11 Script error: No such module "val".
Template:Mpl L4 1.52377 1.28284 0.15811 13.27271 21.59 Script error: No such module "val".

See also

References

<templatestyles src="Reflist/styles.css" />

  1. ↑ Script error: No such module "Citation/CS1".
  2. ↑ Script error: No such module "Citation/CS1".
  3. ↑ a b c Script error: No such module "Citation/CS1".
  4. ↑ a b Script error: No such module "Citation/CS1".
  5. ↑ Script error: No such module "Citation/CS1".
  6. ↑ Script error: No such module "Citation/CS1".
  7. ↑ Script error: No such module "citation/CS1".
  8. ↑ Script error: No such module "Citation/CS1".
  9. ↑ Script error: No such module "Citation/CS1".
  10. ↑ Script error: No such module "Citation/CS1".
  11. ↑ Script error: No such module "Citation/CS1".
  12. ↑ Script error: No such module "Citation/CS1".
  13. ↑ Script error: No such module "Citation/CS1".

Script error: No such module "Check for unknown parameters".

Template:Asteroids Script error: No such module "Navbox". Script error: No such module "Navbox". Template:Portal bar

Retrieved from "http://debianws.lexgopc.com/wiki143/index.php?title=Mars_trojan&oldid=6448425"