Examples of using Comet nucleus in English and their translations into Russian
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The comet nucleus was estimated to be about 0.9 km in diameter.
Elenin himself estimates that the comet nucleus is roughly 3-4 km in diameter.
The comet nucleus is estimated to be 10.6 kilometers in diameter with a low albedo of 0.022.
Arecibo imaging in 2014 showed the comet nucleus is peanut shaped and about 2.4 km in diameter.
The comet nucleus is estimated to be 3.0 kilometers in diameter with an albedo of 0.05.
For lost comets the back-orbit calculations are especially tricky because of nongravitational forces that can affect their orbits,such as emission of jets of gas from the comet nucleus.
Landslide as initial mechanism of comet nucleus destruction during entrance into dense atmosphere of planet.
During its 1986 apparition, Halley's Comet became the first comet to be observed in detail by spacecraft, providing the first observational data on the structure of a comet nucleus and the mechanism of coma and tail formation.
Supposed collision of the Earth with a comet nucleus can damage our planet not less than a"meeting" with an asteroid.
Carl Sagan in his book Comet(1985) reproduces a Han-dynasty Chinese manuscript(the Book of Silk, 2nd century BCE) that shows comet tail varieties: most are variations on simple comet tails, butthe last shows the comet nucleus with four bent arms extending from it, recalling a swastika.
Over time, most of the volatile material contained in a comet nucleus evaporates away, and the comet becomes a small, dark, inert lump of rock or rubble that can resemble an asteroid.
Research with the Canada-France-Hawaii Telescope(CFHT) infers the comet nucleus to have a radius between 14 and 80 km, so there is a chance the nucleus could be as large as C/1995 O1 Hale-Bopp.
Radar results from the Arecibo Observatory indicated that the comet nucleus was about 4.8 km(3.0 mi) across, and surrounded by a flurry of pebble-sized particles ejected at a few metres per second.
GIADA will measure the number, mass, momentum andvelocity distribution of dust grains coming from the comet nucleus and from other directions(reflected by solar radiation pressure).(Principal investigator: L. Colangeli, INAF/Astronomical Observatory of Capodimonte, Naples, Italy);
Spectra from the Hale Telescope showed a less-red color resembling comet nuclei or Trojans.
In addition to these activities, the Spacewatch team has been involved with studies of the Centaur and Trans-Neptunian minor planet populations andthe sizes of short period comet nuclei.
This is intended to protect against the relatively small asteroids(measuring tens to hundreds of metres)and extinct comet nuclei that collide with the Earth quite frequently and can be detected only a few days, weeks or months before a collision.
OSIRIS is a wide-angle camera anda narrow-angle camera to obtain high-resolution images of the comet's nucleus and the asteroids that Rosetta passes on its voyage to comet 67P/Churyumov-Gerasimenko.
The Nucleus of Comet Hyakutake(C/1996 B2)// Icarus.
The original comet must certainly have been very large indeed,perhaps as large as 100 km across for comparison, the nucleus of Comet Hale-Bopp was about 40 km across.
Broadly speaking, if a comet has a large and active nucleus, will pass close to the Sun, and is not obscured by the Sun as seen from the Earth when at its brightest, it has a chance of becoming a great comet. .
The small size of the nucleus(Halley's Comet is about 15 km(9.3 mi) across, while Comet Hale-Bopp was about 60 km(37 mi) across) implies that Hyakutake must have been very active to become as bright as it did.
A nucleus duplicity of comet C/2004 S1(Van Ness) was detected, and astrometric measurements of fragments of comet 73P/Schwassmann-Wachmann 3 during its close approach to the Earth in 2006 were provided.
The diameter of the comet's nucleus is estimated to be 4.6 km.
Ptolemy An instrument measuring stable isotope ratios of key volatiles on the comet's nucleus.
Based on orbital computations and luminosity before the 2007 outburst,the comet's nucleus was estimated at 3.4 km.
It is the first probe ever designed to enter orbit around a comet's nucleus and release a lander onto its surface.
A crucial factor in how bright a comet becomes is how large and how active its nucleus is.
Before the comet broke up, the(dust and water) nucleus erosion rate was about 1 cm per day.
Comet Hale-Bopp's activity and outgassing were not spread uniformly over its nucleus, but instead came from several specific jets.