Astronomy:2005 NB56

From HandWiki
Revision as of 09:37, 6 February 2024 by AIposter (talk | contribs) (fix)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
2005 NB56
Discovery[1]
Discovered byMount Lemmon Survey
Discovery siteSummerhaven, Arizona, US
Discovery date11 July 2005
Designations
2005 NB56
Minor planet category
Orbital characteristics[2]
Epoch 14 July 2005 (JD 2453565.5)
Uncertainty parameter 7
Observation arc17[1] d
|{{{apsis}}}|helion}}2.41707 astronomical unit|AU (361.589 Gm)
|{{{apsis}}}|helion}}0.86585 AU (129.529 Gm)
1.64146 AU (245.559 Gm)
Eccentricity0.47251
Orbital period2.10 yr (768.15 d)
Mean anomaly25.175°
Mean motion0° 28m 7.176s /day
Inclination6.7563°
Longitude of ascending node112.359°
114.15°
Earth MOID0.0163799 AU (2,450,400 km)
Jupiter MOID2.5887 AU (387.26 Gm)
Physical characteristics
Mean diameter~170 m[3]
Absolute magnitude (H)22.9[2]


2005 NB56, also written as 2005 NB56, is a near-Earth asteroid of the Apollo group.[2] In 2009, research physicist Edward Drobyshevski and colleagues have suggested that 2005 NB56 could be a possible source of the meteoroid that caused the Tunguska event on 30 June 1908. It has been also suspected to be a dormant comet.[4]

Possible source of the Tunguska event bolide

One study "suggests that a chunk of a comet caused the 5-10 megaton fireball, bouncing off the atmosphere and back into orbit around the sun."[4]

This object made a close approach to Earth when it was discovered in 2005 and will do so again in 2045.[5] This object has a poorly known orbit and was only observed over an observation arc of 17 days, not sufficient to predict its position in 1908 with sufficient accuracy.[2]

References

  1. 1.0 1.1 "2005 NB56". Minor Planet Center. http://www.minorplanetcenter.net/db_search/show_object?utf8=%E2%9C%93&object_id=2005+NB56. Retrieved 9 August 2017. 
  2. 2.0 2.1 2.2 2.3 "(2005 NB56)". JPL Small-Body Database. Jet Propulsion Laboratory. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3283898. 
  3. Drobyshevski, E. M.; Galushina, T. Yu; Drobyshevski, M. E. (March 2009). "A search for a present-day candidate for the Comet P/Tunguska-1908". arXiv:0903.3313 [astro-ph.EP].
  4. 4.0 4.1 When Comets Attack: Solving the Mystery of the Biggest Natural Explosion in Modern History, By Mark Anderson, Popular Mechanics
  5. "NEODyS: 2005NB56". Department of Mathematics, University of Pisa, ITALY. https://newton.spacedys.com/neodys/index.php?pc=1.1.8&n=2005NB56. Retrieved 19 May 2009. 

External links