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Topic: 90377 Sedna


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In the News (Fri 19 Apr 19)

  
  90377 Sedna - Wikipedia, the free encyclopedia
Sedna was discovered during a survey conducted with the Samuel Oschin telescope at Palomar Observatory near San Diego, California (USA) using Yale's 160 megapixel Palomar Quest camera and was observed within days on telescopes from Chile, Spain, and the USA (Arizona, and Hawaii).
Unlike Pluto and Charon, Sedna appears to have very little methane ice or water ice on its surface; Chad Trujillo and his colleagues at the Gemini Observatory in Hawaii suggest that Sedna's dark red color is caused by a hydrocarbon sludge, or tholin, like that found on 5145 Pholus.
Sedna may be made a candidate for consideration as a dwarf planet.
en.wikipedia.org /wiki/90377_Sedna   (1337 words)

  
 Sedna (mythology) - Wikipedia, the free encyclopedia
Although Sedna is sometimes thought to predominate throughout the Canadian Arctic she was known by other names by different Inuit groups.
According to one myth, Sedna, similar to a mermaid, was the daughter of the creator-god Anguta and his wife.
Her name was taken also to name a new disputed "tenth" planet, 90377 Sedna, as discovered by Michael Brown (Caltech), Chad Trujillo (Gemini Observatory) and David Rabinowitz (Yale University) on November 14, 2003..
en.wikipedia.org /wiki/Sedna_(deity)   (451 words)

  
 Sedna - Crystalinks
Sedna is described as a cold planetoid, perhaps as large as two-thirds the size of Pluto.
Sedna was discovered during a survey conducted with the Samuel Oschin telescope at Palomar Observatory near San Diego, California (USA) and was observed within days on telescopes from Chile, Spain, and the USA (Arizona, and Hawaii).
Sedna's discoverers (like others) call it a planetoid, but because the two objects are similar in size and composition, a permanent decision to classify Sedna as a planetoid could re-open questions about whether Pluto should also bear that classification.
www.crystalinks.com /sedna.html   (1786 words)

  
 Sedna (minor planet 90377)
Sedna, named after the Inuit goddess of the ocean, is currently three times further away than Pluto, the average distance of which from the Sun is 5.9 billion km (3.6 billion miles).
Sedna has a high albedo and very red – the reddest large object in the Solar System after Mars.
Sedna might belong to an inner Oort cloud that could have formed by gravity from a rogue star near the Sun in the Solar System's early days.
www.daviddarling.info /encyclopedia/S/Sedna.html   (646 words)

  
 JPL News -- Most Distant Object in Solar System Discovered
The object, called "Sedna" for the Inuit goddess of the ocean, is 13 billion kilometers (8 billion miles) away, in the farthest reaches of the solar system.
It is estimated Sedna is approximately three-fourths the size of Pluto.
Sedna will become closer and brighter over the next 72 years, before it begins its 10,500-year trip to the far reaches of the solar system.
www.jpl.nasa.gov /releases/2004/85.cfm   (731 words)

  
 90377 Sedna info here at en.89-of-100.info   (Site not responding. Last check: 2007-11-01)
Sedna was heared till a overview conducted with the Samuel Oschin telescope at Palomar Observatory San Diego, California (USA) using Yale's 160 megapixel Palomar Quest camera und was observed brights on telescopes from Chile, Spain, und the USA (Arizona, und Hawaii).
Unlike Pluto und Charon, Sedna rolls in to have very cramped methane ice or bounty ice on its surface; Chad Trujillo und their comrades at the Gemini Observatory in Hawaii theorize that Sedna's unlit red polychromasia is caused by a hydrocarbon sludge, or tholin, coextensive that construct on 5145 Pholus.
The discoverers have argued that Sedna is the leading observed anatomy belonging to the Oort cloud, adage that it's furthermore far passé to be prepense a Kuiper belt object.
en.89-of-100.info /90377_Sedna   (1375 words)

  
 90377 Sedna info here at en.blogada.com   (Site not responding. Last check: 2007-11-01)
Sedna was come uponed throughout a check conducted with the Samuel Oschin telescope at Palomar Observatory nearby San Diego, California (USA) using Yale's 160 megapixel Palomar Quest camera & was observed nautical days on telescopes from Chile, Spain, & the USA (Arizona, & Hawaii).
Unlike Pluto & Charon, Sedna surfaces to have very insufficient methane ice or bathe ice on its surface; Chad Trujillo & her assistants at the Gemini Observatory in Hawaii conjecture that Sedna's dusk red stain is caused by a hydrocarbon sludge, or tholin, selfsame that pop on 5145 Pholus.
The discoverers have argued that Sedna is precisely the induction observed frame belonging to the Oort cloud, epigram that it's likewise far absent to be voluntary a Kuiper belt object.
en.blogada.com /90377_Sedna   (1425 words)

  
 90377 Sedna info here at en.adventure-auction.com   (Site not responding. Last check: 2007-11-01)
90377 Sedna is a trans-Neptunian object, recognized by Michael Brown (Caltech), Chad Trujillo (Gemini Observatory) David Rabinowitz (Yale University) on November 14, 2003.
Sedna was recognized a inspection conducted with the Samuel Oschin telescope at Palomar Observatory ready San Diego, California (USA) using Yale's 160 megapixel Palomar Quest camera was observed inside diurnal courses on telescopes from Chile, Spain, the USA (Arizona, Hawaii).
Unlike Pluto Charon, Sedna pops in to have very inconsiderable methane ice or saturate ice on its surface; Chad Trujillo her confederates at the Gemini Observatory in Hawaii propone that Sedna's shady red glow is caused by a hydrocarbon sludge, or tholin, consonant that line up on 5145 Pholus.
en.adventure-auction.com /own-cookies-recipes/90377_Sedna   (1396 words)

  
 Sedna (90377)
Sedna is in an elliptical orbit, bringing it as close as 76 AU to the sun and as far as 930 AU.
Likewise, at its furthest distance it is not far enough to be influenced by the tidal force of the Galactic plane or passing stars, as are the long period comets that originate in the Oort cloud.
Sedna is currently in the constellation Cetus, just 12 degrees south of the ecliptic, next to the zodiacal constellation of Aries.
www.calvin.edu /academic/phys/observatory/images/sedna   (547 words)

  
 Print the story   (Site not responding. Last check: 2007-11-01)
Initial studies of Sedna's origin have speculated that it might have been ejected from the giant planets region of our solar system far inside the orbit of Pluto, or perhaps was captured from a passing star's Kuiper Belt.
This software was used to explore the feasibility of building Sedna from boulder-sized and other small bodies at distances between 75 AU (Sedna's closest solar approach distance) and 500 AU (Sedna's average distance from the Sun).
Stern's Sedna formation simulations assumed that Sedna's original orbit, while distant from the Sun, was circular.
www.physorg.com /printnews.php?newsid=2788   (454 words)

  
 sedna sun   (Site not responding. Last check: 2007-11-01)
Sedna probably was formed nearer to the Sun, in what s now the Kuiper Belt.
At its closest approach, Sedna is 70 AU away from the Sun.
Sedna, the most distant planetoid ever seen in the Solar System, probably got kicked into its orbit when a star swept past the Sun more than four billion...
astroshop.com.ru /q/solar-system/sedna_sun.html   (308 words)

  
 Sedna - Bad Astronomy and Universe Today Forum
There's no sense in sending a probe, when it eventually would be so far away from the sun that it couldn't operate long enough to obtain scientific results unless it used an energy source independent from the sun.
Sedna is 90 AU, in pretty much in the opposite direction.
Does anyone know what Sedna's orbital velocity is? I could calculate it (roughly) I suppose, but I haven't been to bed yet and my head may explode.
www.bautforum.com /showthread.php?t=10308&page=2   (2049 words)

  
 Sedna (2003 VB12)
In collaboration with Frank Bertoldi at the MPIfR Bonn, we used the 30 meter diameter IRAM telscope, and in collaboration with John Stansberry at the University of Arizona and Bill Reach at the Spitzer Science Certer, we used the Spitzer Space Telescope.
Sedna is currently the only object known in its orbital vicinity, but we strongly suspect that there will be many others found out there with time.
A second speculative explanation for Sedna's orbit is that a larger body, perhaps Mars-sized or larger could exist at around 70 AU in a circular orbit and could have caused Sedna to get thrown into its strange orbit.
www.gps.caltech.edu /~mbrown/sedna   (4671 words)

  
 Gemini Observatory   (Site not responding. Last check: 2007-11-01)
Sedna was discovered on November 14, 2003 by a CalTech team, using the 48-inch Samuel Oschin Telescope at Palomar Observatory.
The relative reflectance spectrum of (90377) Sedna (fl circles) and the spectrum of the nearby sky (grey circles).
The Sedna data lack the strong spectral lines that would indicate the existence of substances like methane and water ice, but deeper studies are needed to confirm how low the levels of these ices might be on this planetoid.
www.gemini.edu /index.php?option=content&task=view&id=126   (876 words)

  
 90377 Sedna - Free net encyclopedia   (Site not responding. Last check: 2007-11-01)
temperature=~12 K}} 90377 Sedna is a trans-Neptunian object, discovered by Michael Brown (Caltech), Chad Trujillo (Gemini Observatory) and David Rabinowitz (Yale University) on November 14, 2003.
They proposed another, less probable scenario that managed to explain Sedna's orbit very well —Sedna could have formed around a brown dwarf about 20 times less massive than the Sun and have been captured by our solar system when the brown dwarf passed through it.
Another object, Template:Mpl, has an orbit similar to Sedna's but a bit less extreme: perihelion is 45 AU, aphelion is 415 AU, and the orbital period is 3420 years.
www.netipedia.com /index.php/90377_Sedna   (1112 words)

  
 Planet   (Site not responding. Last check: 2007-11-01)
Recently an object, 90377 Sedna, has been discovered orbiting the sun 13 Tm (13 billion kilometres) away, three times farther than Pluto.
Sedna, after the Inuit goddess of the sea, is a 1180–2360 km (730-1470 miles) diameter object.
Several news sources have already reported Sedna as the tenth planet [1], but that is not generally accepted by astronomers.
www.wikimoz.org /wiki/en/wikipedia/p/pl/planet.html   (1175 words)

  
 Planetoid Sedna may have formed far beyond Pluto
This software wasused to explore the feasibility of building Sedna from boulder-sized andother small bodies at distances between 75 AU (Sedna's closest solarapproach distance) and 500 AU (Sedna's average distance from the Sun).
Stern's Sedna formation simulations assumed that Sedna's original orbit,while distant from the Sun, was circular.
Astronomers agree that Sedna couldnot have formed in its present, eccentric orbit because such an orbit allowsonly violent collisions that prevent the growth of small bodies.
www.atlasaerospace.net /eng/newsi-r.htm?id=1912   (466 words)

  
 Case Of Sedna's Missing Moon Solved
Sedna appeared to be spinning very slowly compared to most solar system objects, completing one rotation every 20 days.
Sedna is an odd world whose extreme orbit takes it more than 45 billion miles from the Sun, or more than 500 astronomical units (where one astronomical unit is the average Earth-Sun distance of 93 million miles).
Sedna never approaches the Sun any closer than 80 astronomical units, and takes 10,000 years to complete one orbit.
www.spacedaily.com /news/kuiper-05b.html   (687 words)

  
 Upto11.net - Wikipedia Article for 2075   (Site not responding. Last check: 2007-11-01)
In 2076, around May 31, the planetoid 90377 Sedna is expected to reach its perihelion, in other words, reach the closest it can get, orbit-wise, to the Sun.
It is expected to reach a distance of 76 AU, or 76 times the distance Earth is from the Sun.
Sedna has a highly elliptical orbit, thus it is difficulty to locate —at its aphelion, it reaches about 942 AU.
www.upto11.net /generic_wiki.php?q=2075   (91 words)

  
 search.com - 90377 Sedna - Search.com Reference
At the time of its discovery it was the most distant observed natural solar system body, though this has now been exceeded by 2003 UB Sedna is described as a cold planetoid, perhaps as large as two-thirds the size of Pluto.
Before Sedna was officially named it had provisional designation 2003 VB As of September 28, 2004, the International Astronomical Union has officially accepted the name "Sedna".
It is now generally believed to be the 4th largest known trans-Neptunian object after 2003 UB Pluto, and 2005 FY The planetoid is so far from the Sun that the temperature never rises above 23 kelvins (−240 °C; −400 °F).
domainhelp.search.com /reference/90377_Sedna   (1240 words)

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