21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 4, Problem 20QP
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Which comet will return to the vicinity of Sun?
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A comet that was seen in April 574 by Chinese astronomers on a day known by them as the Woo Woo day was spotted again in May 1994. Assume the time between observations is the period of the Woo Woo day comet and its eccentricity is 0.9932.What are (a) the semimajor axis of the comet’s orbit and (b) its greatest distance from the Sun in terms of the mean orbital radius RP of Pluto?
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Chapter 4 Solutions
21st Century Astronomy
Ch. 4.1 - Prob. 4.1ACYUCh. 4.1 - Prob. 4.1BCYUCh. 4.2 - Prob. 4.2CYUCh. 4.3 - Prob. 4.3CYUCh. 4.4 - Prob. 4.4CYUCh. 4 - Prob. 1QPCh. 4 - Prob. 2QPCh. 4 - Prob. 3QPCh. 4 - Prob. 4QPCh. 4 - Prob. 5QP
Ch. 4 - Prob. 6QPCh. 4 - Prob. 7QPCh. 4 - Prob. 8QPCh. 4 - Prob. 9QPCh. 4 - Prob. 10QPCh. 4 - Prob. 11QPCh. 4 - Prob. 12QPCh. 4 - Prob. 13QPCh. 4 - Prob. 14QPCh. 4 - Prob. 15QPCh. 4 - Prob. 16QPCh. 4 - Prob. 17QPCh. 4 - Prob. 18QPCh. 4 - Prob. 19QPCh. 4 - Prob. 20QPCh. 4 - Prob. 21QPCh. 4 - Prob. 22QPCh. 4 - Prob. 23QPCh. 4 - Prob. 24QPCh. 4 - Prob. 25QPCh. 4 - Prob. 26QPCh. 4 - Prob. 27QPCh. 4 - Prob. 28QPCh. 4 - Prob. 29QPCh. 4 - Prob. 30QPCh. 4 - Prob. 31QPCh. 4 - Prob. 32QPCh. 4 - Prob. 33QPCh. 4 - Prob. 34QPCh. 4 - Prob. 35QPCh. 4 - Prob. 36QPCh. 4 - Prob. 37QPCh. 4 - Prob. 38QPCh. 4 - Prob. 39QPCh. 4 - Prob. 40QPCh. 4 - Prob. 41QPCh. 4 - Prob. 42QPCh. 4 - Prob. 43QPCh. 4 - Prob. 44QPCh. 4 - Prob. 45QP
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- A comet has a period of 76.3 years and moves in an elliptical orbit in which its perihelion (Closest approach to the Sun) is 0.610 AU. Find (a) the semimajor axis of the comet and (b) an estimate of the comets maximum distance from the Sun, both in astronomical units.arrow_forwardWhat is the period of revolution for a comet with aphelion at 5 AU and perihelion at the orbit of Earth?arrow_forwardDescribe the nucleus of a typical comet and compare it with an asteroid of similar size.arrow_forward
- Which of the following is not true of comets? (17.6) (a) They are composed of dust and ice. (b) They revolve around the Sun in highly elliptical orbits. (c) They can be observed on entering the solar system. (d) They usually have a long tail when they are close to the Sun.arrow_forwardWhat is the period of revolution about the Sun for an asteroid with a semi-major axis of 3 AU in the middle of the asteroid belt?arrow_forwardThe mass of an average comet’s nucleus is about 1014 kg. If the Oort cloud contains 21012 comet nuclei, what is the mass of the cloud in Earth masses? Compare that with Jupiter’s mass. (Note: Relevant data can be found in Appendix Table A-10.)arrow_forward
- Comets have very elongated elliptical orbits with the sun at one focus. Using Kepler's Law, why a comet travels much faster near the sun than it does at the other end of the orbit.arrow_forwardA comet has a period of 70.3 years and moves in an elliptical orbit in which its perihelion (closest approach to the Sun) is 0.620 AU. Find the semimajor axis of the comet and an estimate of the comet's maximum distance from the Sun, both in astronomical units. (a) the semimajor axis of the comet (in AU) (b)an estimate of the comet's maximum distance (in AU) from the Sunarrow_forwardShort-period comets like Halley Comet a. return to the Oort Cloud during each of their orbits b. come back again and again at predictable intervals. c. have a long tail visiable during their entire orbit around the Sun d. can never be observed without a telescope e. you can't fool me, the only short-period comet we know is Halleyarrow_forward
- Which of the following about comets is TRUE? a. Cometary orbits always lie close to the ecliptic plane b. Long period comets must originate from well beyond even the Kuiper Belt c. The Oort cloud is the large cloud of gas surrounding a comet nucleus while it is near the Sun d. Tails of comets always lie along the path of the orbitarrow_forwardA comet has a period of 75.3 years and moves in an elliptical orbit in which its perihelion (closest approach to the Sun) is 0.640 AU. Find the semimajor axis of the comet and an estimate of the comet's maximum distance from the Sun, both in astronomical units. (a) the semimajor axis of the comet (in AU) (b) an estimate of the comet's maximum distance (in AU) from the Sunarrow_forwardAnother comet has an orbit about the sun whose semi-major axis is 12 AU, with an eccentricity of 0.77. What is the closest that this comet gets to the Sun during the course of its orbit? Answer in AU, but with just a numberarrow_forward
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