Ceres (dwarf planet): Difference between revisions
imported>Robert Thorpe No edit summary |
mNo edit summary |
||
| (27 intermediate revisions by 10 users not shown) | |||
| Line 1: | Line 1: | ||
'''Ceres''' is | {{subpages}} | ||
{{Infobox dwarf planet | |||
|name = Ceres | |||
|epoch = 2007 Apr 10.0 | |||
|mano = 215.80100 | |||
|mmot = 0.21425752 | |||
|sma = 2.7659565 | |||
|ecc = 0.0797602 | |||
|orbper = 4.60 | |||
|peri2000 = 73.15069 | |||
|node2000 = 80.40696 | |||
|incl2000 = 10.58671 | |||
|avmag = 3.34 | |||
|slope = 0.12 | |||
}} | |||
'''Ceres''' is a [[dwarf planet]] situated in the [[asteroid belt]]. It was classified as a dwarf planet, along with [[Pluto]] in the [[Kuiper belt]] and [[Eris]] in the [[scattered disc]], when this new category was created by the [[International Astronomical Union|IAU]] in 2006. | |||
Ceres was discovered by [[Piazzi]] in the first days of the 19th century. Originally, on 1 January 1801, Piazzi thought that he had discovered a new [[comet]]. Only after Carl Friedrich [[Gauß]] calculated the course of the object did they find out that it was somewhere between the orbits of [[Mars (planet)]] and [[Jupiter]]. These calculations enabled [[Franz Xaver von Zach|Zach]] to find Ceres again on 11 February. | |||
It was originally classified as a [[planet]], albeit a strangely small one; but after the discovery of [[2 Pallas]], [[3 Juno]], [[4 Vesta]] and other small bodies with nearby orbits, it was reclassified in 1852 as the largest [[asteroid]], '1 Ceres', a status it maintains alongside its dwarf planethood. | |||
On 14 January 2014, scientists examining data from the ESA Herschel space observatory announced the discovery of plumes of water vapour emanating from the surface of Ceres.<ref>{{cite news|date=22 January 2014|title=Water detected on dwarf planet Ceres|url=http://science.nasa.gov/science-news/science-at-nasa/2014/22jan_ceres/|work=NASA Science News|publisher=NASA|accessdate=20 March 2014}}</ref> It is speculated that Ceres may contain more fresh water than that of [[Earth]], locked up in a mantle of sub-surface ice. [[NASA]] space probe Dawn is expected to arrive and map Ceres in the northern spring of 2015. | |||
==See also== | |||
*[[Pluto]] | |||
*[[Eris]] | |||
*[[Dwarf planet]] | |||
==References== | |||
{{reflist}}[[Category:Suggestion Bot Tag]] | |||
Latest revision as of 11:01, 26 July 2024
| Epoch: | 2007 Apr 10.0 |
|---|---|
| M | 215.80100 |
| n: | 0.21425752 |
| a: | 2.7659565 |
| e: | 0.0797602 |
| P: | 4.60 |
| Perihelion: | 73.15069 |
| Node: | 80.40696 |
| Inclination: | 10.58671 |
| H: | 3.34 |
| G: | 0.12
|
| M | Mean anomaly at the epoch. |
| n | Mean daily motion (in degrees/day). |
| a | Semimajor axis (in AU). |
| e | Orbital eccentricity. |
| P | Orbital period (in years). |
| Perihelion | The J2000.0 argument of perihelion (in degrees). |
| Node | The J2000.0 longitude of the ascending node (in degrees). |
| Inclination | The J2000.0 inclination (in degrees). |
| H | Absolute visual magnitude. |
| G | Slope parameter. For an explanation of the H,G magnitude system refer to Application of Photometric Models to Asteroids, Bowell et al., in Asteroids II, 524-556 (published by the University of Arizona Press, ISBN 0-8165-1123-3) and the references therein. |
Ceres is a dwarf planet situated in the asteroid belt. It was classified as a dwarf planet, along with Pluto in the Kuiper belt and Eris in the scattered disc, when this new category was created by the IAU in 2006.
Ceres was discovered by Piazzi in the first days of the 19th century. Originally, on 1 January 1801, Piazzi thought that he had discovered a new comet. Only after Carl Friedrich Gauß calculated the course of the object did they find out that it was somewhere between the orbits of Mars (planet) and Jupiter. These calculations enabled Zach to find Ceres again on 11 February.
It was originally classified as a planet, albeit a strangely small one; but after the discovery of 2 Pallas, 3 Juno, 4 Vesta and other small bodies with nearby orbits, it was reclassified in 1852 as the largest asteroid, '1 Ceres', a status it maintains alongside its dwarf planethood.
On 14 January 2014, scientists examining data from the ESA Herschel space observatory announced the discovery of plumes of water vapour emanating from the surface of Ceres.[1] It is speculated that Ceres may contain more fresh water than that of Earth, locked up in a mantle of sub-surface ice. NASA space probe Dawn is expected to arrive and map Ceres in the northern spring of 2015.
See also
References
- ↑ Water detected on dwarf planet Ceres, NASA Science News, NASA, 22 January 2014. Retrieved on 20 March 2014.