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Topic: Epimetheus moon


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In the News (Tue 29 Dec 09)

  
  Epimetheus (moon) - Wikipedia, the free encyclopedia
Epimetheus (ep'-i-mee'-thee-us, Greek Επιμηθεύς) is a moon of Saturn.
Since closer orbits have higher velocities the two moons must inevitably approach each other, and since Epimetheus' diameter is 115 km and Janus' is 178 km it would seem at first glance that a collision is also inevitable.
Janus and Epimetheus may have formed from a disruption of a single parent to form co-orbital satellites, but if this is the case the disruption must have happened early in the history of the satellite system.
en.wikipedia.org /wiki/Epimetheus_(moon)   (557 words)

  
 Epimetheus, A Moon of Saturn
Epimetheus [ep-eh-MEE-thee-us] is the fifth satellite of Saturn.
Epimetheus was the son of Iapetus and brother to Prometheus and Atlas.
This image of Epimetheus was acquired by the Voyager 2 spacecraft on August 26, 1981.
www.solarviews.com /eng/epimethe.htm   (846 words)

  
 Epimetheus (moon) -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-11-06)
Epimetheus (ep'-i-mee'-thee-us, Greek Επιμηθεύς) is a (Any natural satellite of a planet) moon of (A giant planet which is surrounded by three planar concentric rings of ice particles; 6th planet from the sun) Saturn.
Epimetheus occupies essentially the same orbit as the moon ((Roman mythology) the Roman god of doorways and passages; is depicted with two faces on opposite sides of his head) Janus.
Epimetheus and ((Roman mythology) the Roman god of doorways and passages; is depicted with two faces on opposite sides of his head) Janus are "co-orbital".
www.absoluteastronomy.com /encyclopedia/E/Ep/Epimetheus_(moon).htm   (1022 words)

  
 Encyclopedia: Epimetheus (moon)   (Site not responding. Last check: 2007-11-06)
Inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit and is the angular distance of the orbital plane from the plane of the reference (usually planets equator or the ecliptic), stated in degrees.
Moons of solar system scaled to Earths Moon The common noun moon (not capitalized) is used to mean any natural satellite of the other planets.
In Greek mythology, Epimetheus was the son of Iapetus and brother of Prometheus and Atlas; Epimetheus is Greek for hindsight.
www.nationmaster.com /encyclopedia/Epimetheus-(moon)   (2387 words)

  
 Janus (moon) - Wikipedia, the free encyclopedia
Janus (jay'-nus, Greek Ιανός) is a moon of Saturn.
Although the name was informally proposed soon after the initial 1966 discovery, it was not officially given this name until 1983.
According to the OED, the adjectival form of the moon's name is Janian.
en.wikipedia.org /wiki/Janus_(moon)   (465 words)

  
 Cassini-Huygens: News-Press Releases-2005   (Site not responding. Last check: 2007-11-06)
An image of Saturn's small moon, Epimetheus (epp-ee-MEE-thee-uss), was captured by the Cassini spacecraft in the closest view ever taken of the pockmarked body.
Epimetheus is irregularly shaped and dotted with soft-edged craters.
Spectra of Epimetheus from the Cassini visual infrared mapping spectrometer indicate that the moon is mostly water ice.
saturn.jpl.nasa.gov /news/press-release-details.cfm?newsID=563   (293 words)

  
 The Moons of Saturn
Saturn's other moons have icy surfaces that are very cold so that ice is as rigid as rock and craters form from meteor impacts.
An elongated clump or arc of debris in the F ring is seen as a slight brightening on the far side of this thin ring.
In various instances now we know that ring structures in the Jovian planets are stabilized by small "shepherd moons" that orbit in or near the rings and stabilize them by their gravitational influences.
csep10.phys.utk.edu /astr161/lect/saturn/moons.html   (832 words)

  
 Epimetheus   (Site not responding. Last check: 2007-11-06)
Epimetheus is the 4th closest moon to Saturn, with a standoff distance of 151,422 km.
Epimetheus is one of the small moons, being 70 x 50 km (45 x 33 miles) in size.
As a small moon, the composition and surface features of Epimetheus are unknown.
www.windows.ucar.edu /tour/link=/saturn/moons/epimetheus.html   (170 words)

  
 Epimetheus on Encyclopedia.com   (Site not responding. Last check: 2007-11-06)
Also known as Saturn XI (or S11), Epimetheus is an irregularly shaped (nonspherical) body measuring about 89 mi (144 km) by 67 mi (108 km) by 61 mi (98 km); it orbits Saturn at a mean distance of 94,090 mi (151,422 km) and has equal orbital and rotational periods of 0.6942 earth days.
Epimetheus and Janus are co-orbital; that is, they share the same average orbit.
The two moons may have formed from the disruption of a single satellite early in the formation of Saturn's satellite system.
www.encyclopedia.com /html/e/epimethe1.asp   (439 words)

  
 Epimetheus (moon)   (Site not responding. Last check: 2007-11-06)
Audouin Dollfus observed a moon on December 15 1966, which he proposed to be named "Janus".
[1] However, at the time, it was believed that there was only one moon, unofficially known as "Janus", in the given orbit.
The Cassini-Huygens orbiter is due to perform a flyby of Epimetheus on December 3, 2007.
www.sciencedaily.com /encyclopedia/epimetheus__moon_   (547 words)

  
 Epimetheus (moon)   (Site not responding. Last check: 2007-11-06)
Since closer orbits have higher velocities thetwo moons must inevitably approach each other, and since Epimetheus' diameter is 115 km and Janus' is 178 km it would seem atfirst glance that a collision is also inevitable.
But as the inner moon catches up with the outer moon their mutual gravitationalattraction boosts the inner moon's momentum and raises its orbit, causing it to slow down.
Janus and Epimetheus may have formed from a disruption of a single parentto form co-orbital satellites, but if this is the case the disruption must have happened early in the history of the satellitesystem.
www.therfcc.org /epimetheus-moon--32689.html   (276 words)

  
 [13.0] The Exploration Of Saturn   (Site not responding. Last check: 2007-11-06)
However, there was confusion over this discovery at the time, since the orbits of the two moons and their sizes are similar, and nobody was quite sure which was which, or if there was one moon that was being reported as two.
Hyperion is a lumpy moon with dimensions of 410 by 260 by 220 kilometers.
Both are similar bodies, with Epimetheus having dimensions of 144 by 108 by 98 kilometers, and Janus with dimensions of 196 by 192 by 150 kilometers.
www.vectorsite.net /taxpl_13.html   (5935 words)

  
 StarDate Online | Cassini Probe (2004) Images and Updates
The surface of the little moon is heavily cratered, indicating that it has undergone a heavy bombardment from asteroids, comets, or other moons during its long lifetime.
The surface of Saturn's moon Tethys is scarred by the impacts of thousands of meteorites, which have left craters on top of craters.
Bands of light and dark material in the large crater at the top center of this image indicate that Saturn's moon Phoebe is a big ball of ice and rock coated with a layer of dark rock and soil, according to scientists with the Cassini mission.
stardate.org /resources/gallery/cassini   (2011 words)

  
 TPS: Saturn's moon Epimetheus   (Site not responding. Last check: 2007-11-06)
Epimetheus and Janus share nearly the same orbit within the large gap between Saturn's F and G rings; only 50 kilometers (30 miles) separates their obrital radii.
Epimetheus is a good-sized rock but is still pretty small for a moon.
Color variations in the image are most likely a result of "photometric effects," changes in the reflectivity of the surface of Epimetheus with the angle of the incoming sunlight.
www.planetary.org /saturn/epimetheus.html   (494 words)

  
 APOD Search Results for "moon"
The previously unknown moon is estimated to span about seven kilometers and appears to have the same brightness as nearby ring particles.
In the original Moon race - the race to map the Moon - this moon maiden first appeared in telescope-based drawings of the lunar surface by astronomer Giovanni Cassini in 1679.
Moon itself, surface details are visible in both the bright uneclipsed portion in direct sunlight, and the very much dimmer copper-colored, eclipsed region.
antwrp.gsfc.nasa.gov /cgi-bin/apod/apod_search?moon   (11045 words)

  
 BBC NEWS | Science/Nature | Saturn probe spies 'cheese' moon
At just 116km (72 miles) across, the satellite is slightly smaller than its companion moon, Janus, which orbits at much the same distance from Saturn.
The moon with its thick atmosphere is a fascinating target for researchers.
The moon is rapidly becoming a very interesting target for Cassini.
news.bbc.co.uk /2/hi/science/nature/4493303.stm   (579 words)

  
 StarDate Online | Image Gallery | En Pointe
Saturn's largest moon, Titan, and a smaller moon, Epimetheus, appear to balance on the edge of Saturn's rings in this recent image from the Cassini spacecraft, which is orbiting the giant planet.
Titan appears featureless because its thick atmosphere is topped by a layer of haze that shrouds the moon's surface from view.
Epimetheus is a small, roughly potato-shaped chunk of bare rock.
stardate.org /resources/gallery/gallery_detail.php?id=470   (104 words)

  
 HubbleSite - Moons Around Saturn - Image - 4/26/1996
Moving out from Saturn, the visible rings are: the broad C Ring, the Cassini Division, and the narrow F Ring.
The first pair of images shows the large, bright moon Dione, near the middle of the frames.
Astronomical images may vary in size and resolution for several reasons: different cameras have detectors of different pixel size, images may be cropped from larger fields, and the images may consist of mosaics of several images.
hubblesite.org /newscenter/newsdesk/archive/releases/1996/18/image/b   (474 words)

  
 APOD: 2005 April 29 - Small Moon Epimetheus   (Site not responding. Last check: 2007-11-06)
Similar in size, saturnian moon Janus occupies an orbit separated from Epimetheus' by only about 50 kilometers.
In fact, co-orbiting Epimetheus and Janus both consist mostly of porous water ice and could have formed from the breakup of a single parent body.
The small moons are also believed to play a role in maintaining the outer edge of Saturn's A ring.
antwrp.gsfc.nasa.gov /apod/ap050429.html   (156 words)

  
 Pandora
Prometheus is the inner shepherd satellite of the F ring.
Prometheus has a number of ridges and valleys and several craters about 20 km in diameter but appears to be less cratered than the neighboring moons Pandora, Janus and Epimetheus.
It is possible that Prometheus's orbit was changed by a recent encounter with the F ring, or it may have a small companion moon sharing its orbit.
seds.lpl.arizona.edu /billa/tnp/pandora.html   (365 words)

  
 Omniseek: /Science & Tech /Astronomy /Solar System /Planets /Saturn /Moons /Epimetheus
Saturn XI Epimetheus Facts Epimetheus is the fifth of Saturn's known satellites: distance from Saturn: 151,422 km diameter: 115 km (144 x 108 x 98) mass: 5.6e17 kg a.k.a.
Saturn XI Epimetheus is the fifth of Saturn's known satellites: distance from Saturn: 151,422 km There are several craters larger than 30 km in diameter as well as both large and small ridges and grooves.
Saturn X Janus ("JAY nus") is the sixth of Saturn's known satellites: Janus was the god of gates and doorways, depicted with two faces looking in opposite directions; also the root of the English word "January".
www.omniseek.com /srch/{139150}   (317 words)

  
 Epimetheus (moon) Encyclopedia Article, Definition, History, Biography   (Site not responding. Last check: 2007-11-06)
Looking For epimetheus moon - Find epimetheus moon and more at Lycos Search.
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www.createdbygod.com /encyclopedia/Epimetheus_(moon)   (702 words)

  
 IAAS Monthly Astronomy Newsletter   (Site not responding. Last check: 2007-11-06)
The Moon passes 5° south of Neptune on the 1st.
The Moon passes 3° south of Uranus on the 3rd.
The Moon occults Antares on the evening of the 23 (early morning on the 24th) for most of North America.
home.att.net /~bfa3/Archives/may05.html   (2188 words)

  
 Epimetheus   (Site not responding. Last check: 2007-11-06)
Epimetheus is the fifth of Saturn's known satellites:
Epimetheus was the son of Iapetus and brother of Prometheus and Atlas; husband of Pandora.
The dark line across the surface in the image above is actually the shadow of the Saturn's F-ring.
www.csc.tcd.ie /~tass/tnp/nineplanets/epimetheus.html   (102 words)

  
 Tiny Epimetheus Outside the Rings - Bad Astronomy and Universe Today Forum
The bright, knotted core of Saturn's F ring is visible, with thin, dusty strands on either side.
Epimetheus is only 116 kilometers (72 miles) across, and part of it is illuminated by reflected light from Saturn.
Cassini took this image on June 20, 2005 when it was 1.8 million kilometers (1.1 million miles) from Epimetheus.
www.bautforum.com /showthread.php?p=550254#post550254   (108 words)

  
 Spaceflight Now | Cassini | Saturn's Epimetheus up-close and colorful
Highlights of pre-flight work involving the redesigned external fuel tank for the space shuttle return to flight mission is packaged into this movie with narration.
The images for this color composite were obtained with the Cassini spacecraft narrow-angle camera at a distance of approximately 74,600 kilometers (46,350 miles) from Epimetheus.
Gemini 12: The NASA Mission Reports covers the voyage of James Lovell and Buzz Aldrin that capped the Gemini program's efforts to prove the technologies and techniques that would be needed for the Apollo Moon landings.
spaceflightnow.com /cassini/050430epimetheus.html   (602 words)

  
 [No title]   (Site not responding. Last check: 2007-11-06)
GLOBAL PHOTOMOSAIC OF EPIMETHEUS Epmethe2.gif is a photomosaic of the surface of Epimetheus, the smaller co-orbital satellite of Saturn.
A shaded relief drawing of Epimetheus is available as EPIMETHE.GIF.
A map of Epimetheus was published in: Stooke, P.J., 1993.
publish.uwo.ca /~pjstooke/epmethe2.txt   (246 words)

  
 RedShift / News
Properties and statistics of Epimetheus with an image.
Description of specific orbital properties of Epimetheus and Janus with photos and illustrations.
Details of Voyager 1 raw image of Saturn's moon Epimetheus.
www.maris.com /content/news/news.php3?cur=39   (67 words)

  
 Cassini Captures Swiss-cheese Look Of Saturn Moon
Strings Of Shadowy Rings Drape Saturn (September 17, 2004) -- Saturn's ring shadows appear wrapped in a harmonious symphony with the planet in this color view from the Cassini...
Encounter With Phoebe: Cassini Spacecraft Closes In On Saturn's Enigmatic Moon (June 11, 2004) -- The most complex interplanetary mission ever launched is about to meet one of our Solar System's most enigmatic moons.
Titan's First Close-Up: Cassini Spacecraft Beams Back Pictures Of Saturn's Moon (October 27, 2004) -- The Cassini spacecraft beamed back information and pictures Tuesday night (October 26, 2004) after successfully skimming the hazy atmosphere of Saturn's moon...
www.sciencedaily.com /releases/2005/04/050428093232.htm   (470 words)

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