Paradoxes of the problem of the Tunguska meteorite

N, Vasilev

doi:10.1007/bf00895778

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…In the mid-I980s, claims appeared in the press that the observations made at the Angara River contradict the eastern version of the trajectory (A = 99-115') and agree better with the older Krinov's version (Vasil'ev, 1985(Vasil'ev, , 1986. However, no proofs were presented for this statement.…”

Section: Determination Of the Trajectory Azimuthmentioning

confidence: 87%

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Trajectory and orbit of the Tunguska meteorite revisited

Бронштен

1999

Meteorit & Planetary Scien

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Abstract-A critical survey is presented of all determinations of the azimuth and inclination of the Tunguska meteorite's trajectory based either on eyewitness testimonies or on the mathematical treatment of the forestleveling field in the area of the catastrophe. The eyewitness testimonies collected in the neighborhood of the Nizhnyaya Tunguska River indicate the most probable azimuth of the trajectory projection to be 104' from the north to the east, which is close to the most recent azimuth estimate from the forest-leveling field, 99". For the most part of the trajectory, its inclination could not exceed 15". However, it is seen from aerodynamic calculations that the combined action of the gravity field and a nonzero aerodynamic lift could increase the inclination to 40" as the end of the trajectory was approached. Meteoroid orbits are calculated for a broad family of trajectories with azimuths ranging from 99' (Fast et al., 1976) to 137 ' (Krinov, 1949) and geocentric velocities ranging from 25 to 40 km/s. Orbits with large azimuth values ( 120" and larger) are shown to belong to the asteroidal type. They are succeeded by the orbits of short-period and long-period comets, whereas very small azimuth values and large geocentric velocities correspond to the region of hyperbolic orbits. Certain restrictions on the possible trajectory azimuths and geocentric velocities of the Tunguska body are imposed by this study.

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Section: Determination Of the Trajectory Azimuthmentioning

confidence: 87%

“…As Anfinogenov established on looking through Irkutsk newspapers (Anfinogenov and Bugaeva, 1984;Vasil'ev, 1985), a bright evening bolide was actually observed in 1908 June; it was in no way related to the Tunguska meteorite. One person saw it at night.…”

Section: Determination Of the Trajectory Azimuthmentioning

confidence: 99%

Trajectory and orbit of the Tunguska meteorite revisited

Бронштен

1999

Meteorit & Planetary Scien

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“…Academician (of USSR Academy of Medical Sciences) Nikolai Vasil'ev, who was informal leader of the Tunguska research wrote [Vasil'ev, 1992] (a mistype is corrected):…”

Section: Fig5mentioning

confidence: 99%

New data on accounts of the 1908 Tunguska event

Ol'khovatov¹

2020

Terra Nova

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There has been a longstanding debate about the nature of the 1908 Tunguska event.Many eyewitness accounts were collected more than half of a century after the event. Among these are many second-hand oral accounts after the generation of eyewitnesses faded away. However, several years ago, two valuable publications appeared containing first-hand eyewitness accounts collected by a Russian ethnographer, Sev'yan Vainshtein, during an expedition to the settlement of Sulomay in 1948. This paper presents additional details of these accounts, based on the author's discussions with Vainshtein before he died in 2008, and demonstrates how these accounts shed new light on what happened in Tunguska in June 1908.

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Paradoxes of the problem of the Tunguska meteorite

Cited by 2 publications

References 4 publications

Trajectory and orbit of the Tunguska meteorite revisited

Trajectory and orbit of the Tunguska meteorite revisited

New data on accounts of the 1908 Tunguska event

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