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As Sedna nears its perihelion in mid-2076, [6] [b] the Sun will appear merely as a very bright pinpoint in its sky, the G-type star too far away to be visible as a disc to the naked eye. [42] When first discovered, Sedna was thought to have an unusually long rotational period (20 to 50 days). [43]
It was discovered on November 14, 2003 by astronomers Michael Brown, Chad Trujillo, and David Rabinowitz. Sedna is currently 88 Astronomical units (AU) from the Sun , which is three times the distance between Neptune and the Sun. Sedna's orbit is an ellipse and its aphelion is estimated to be 937 AU.
Sedna is a trans-Neptunian object with the minor-planet number 90377. It was discovered on November 14, 2003, by the astronomers Michael Brown , Chad Trujillo , and David Rabinowitz . As of 2023, Sedna is 84 astronomical units (AU) from the Sun , which is almost three times the distance between Neptune and the Sun. Sedna's orbit is an ellipse ...
Astronomer Mike Brown, who co-discovered Sedna in 2003, believes it to be the most scientifically important trans-Neptunian object found to date, as understanding its peculiar orbit is likely to yield valuable information about the origin and early evolution of the Solar System.
2003 Sedna. 90377 Sedna is a trans-Neptunian object and a likely dwarf planet. For most of its orbit Sedna is farther from the Sun than any other known dwarf planet candidate. In 2003, Sedna was co-discovered by Michael E. Brown, Chad Trujillo, and David Rabinowitz using the Samuel Oschin Telescope at Palomar Observatory. [143] 2003 Psamathe
The number of dwarf planets in the Solar System is unknown. Estimates have run as high as 200 in the Kuiper belt [1] and over 10,000 in the region beyond. [2] However, consideration of the surprisingly low densities of many large trans-Neptunian objects, as well as spectroscopic analysis of their surfaces, suggests that the number of dwarf planets may be much lower, perhaps only nine among ...
Surfers beware: Bearded fireworms, caterpillarlike critters that look like they are straight out of a horror movie are lurking in the sand on Texas beaches. " Your worst nightmares are washing up ...
It belongs to the extreme trans-Neptunian objects defined by their large semi-major axis and is the third sednoid ever to be discovered, after Sedna and 2012 VP 113 ("Biden"). Implications of orbit [ edit ]