2005 NB56

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2005 NB56
Discovery [1]
Discovered by Mount Lemmon Survey
Discovery site Summerhaven, Arizona, US
Discovery date11 July 2005
Designations
2005 NB56
Orbital characteristics [2]
Epoch 14 July 2005 (JD  2453565.5)
Uncertainty parameter 7
Observation arc 17 [1]   d
Aphelion 2.41707  AU (361.589  Gm)
Perihelion 0.86585 AU (129.529 Gm)
1.64146 AU (245.559 Gm)
Eccentricity 0.47251
2.10  yr (768.15  d)
25.175°
0° 28m 7.176s /day
Inclination 6.7563°
112.359°
114.15°
Earth  MOID 0.0163799 AU (2,450,400 km)
Jupiter  MOID 2.5887 AU (387.26 Gm)
Physical characteristics
~170 m [3]
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]

    Contents

    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 2 "2005 NB56". Minor Planet Center . Retrieved 9 August 2017.
    2. 1 2 3 4 "(2005 NB56)". JPL Small-Body Database . Jet Propulsion Laboratory. SPK-ID:  3283898 . Retrieved 9 August 2017.
    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. 1 2 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. Retrieved 19 May 2009.


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