Английская Википедия:(385250) 2001 DH47

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Шаблон:Use dmy dates Шаблон:Infobox planet

Шаблон:Mp, provisional designation Шаблон:Mp, is a sub-kilometer asteroid and Mars trojan orbiting 60° behind the orbit of Mars near the Шаблон:L5.[1][2]

Discovery, orbit and physical properties

Шаблон:Mp was discovered on 1 February 2001 by the Spacewatch program, observing from Steward Observatory, Kitt Peak[3] and classified as Mars-crosser by the Minor Planet Center. Its orbit is characterized by low eccentricity (0.035), moderate inclination (24.4º) and a semi-major axis of 1.52 AU.[3] Its orbit is well determined as it is currently (March 2013) based on 45 observations with a data-arc span of 3,148 days.[4] It has an absolute magnitude of 19.7 which gives a characteristic diameter of 562 m.[4]

Mars trojan and orbital evolution

It was identified as Mars trojan by H. Scholl, F. Marzari and P. Tricarico in 2005 and its dynamical half-lifetime was found to be of the order of the age of the Solar System.[1] Recent calculations[2] confirm that it is indeed a stable Шаблон:L5 Mars trojan with a libration period of 1365 yr and an amplitude of 11°. These values as well as its short-term orbital evolution are very similar to those of 5261 Eureka.

Origin

Long-term numerical integrations show that its orbit is very stable on Gyr time-scales (1 Gyr = 1 billion years).[1][2] As in the case of Eureka, calculations in both directions of time (4.5 Gyr into the past and 4.5 Gyr into the future) indicate that Шаблон:Mp may be a primordial object, perhaps a survivor of the planetesimal population that formed in the terrestrial planets region early in the history of the Solar System.[2]

See also

References

Шаблон:Reflist

Further reading

  • 2001 DH47 Ivashchenko, Y., Ostafijchuk, P., Spahr, T. B. 2007, Minor Planet Electronic Circular, 2007-P09.
  • Dynamics of Mars Trojans Scholl, H., Marzari, F., Tricarico, P. 2005, Icarus, Volume 175, Issue 2, pp. 397–408.
  • Three new stable L5 Mars Trojans de la Fuente Marcos, C., de la Fuente Marcos, R. 2013, Monthly Notices of the Royal Astronomical Society: Letters, Vol. 432, Issue 1, pp. 31–35.

External links

Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Mars Шаблон:Portal bar Шаблон:Authority control

Партнерские ресурсы
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Разное

  1. ↑ 1,0 1,1 1,2 Dynamics of Mars Trojans
  2. ↑ 2,0 2,1 2,2 2,3 Шаблон:Cite journal
  3. ↑ 3,0 3,1 MPC data on 2001 DH47
  4. ↑ 4,0 4,1 Шаблон:Cite web
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