File:GJ581orbits.svg
Original file (SVG file, nominally 660 × 726 pixels, file size: 6 KB)
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Summary[edit]
DescriptionGJ581orbits.svg |
English: Summary
SVG image of the Gliese 581 system orbits. The orbital parameters are taken from Mayor et al. (2009), arXiv:0906.2780v1 [astro-ph.EP] "Title: The HARPS search for southern extra-solar planets XVIII. An Earth-mass planet in the GJ 581 planetary system", table 2. The semimajor axes have been rederived using Kepler's Third Law and a central stellar mass of 0.31 solar masses, as the values in the table are given to 1 significant figure only for the innermost 3 planets. The description element in the SVG's source code gives further information. Assumptions:
Interpreting the diagram The planetary orbits are drawn in orthographic projection, as viewed from directly above the plane of the system so that the orbital direction is anticlockwise. The dashed lines are drawn between the star and the periastron point of each planet, in order to depict the relative orientation of the orbits with respect to each other. The position of each planet in its orbit is calculated using the time of periastron in the table in the Mayor et al. (2009) paper, and are drawn at a time chosen to be close to the start of the Udry et al. (2007) radial velocity observations, which are available here. This time is chosen to minimise the effects of both uncertainties in the orbital parameters and potential orbital evolution of the system. While the orbits are drawn to the correct scale, the star and the planets themselves are not shown to scale as they would be too small to see on the scale of this diagram. In addition, the true radii of the planets themselves are currently unknown as no direct observation of the planets has yet been made. |
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Source | Own work |
Author | Icalanise |
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Licensing[edit]
Public domainPublic domainfalsefalse |
I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:13, 6 November 2010 | 660 × 726 (6 KB) | Icalanise (talk | contribs) | Added direction arrows and data | |
21:43, 12 October 2010 | 640 × 768 (5 KB) | Icalanise (talk | contribs) | Reverted to version as of 21:29, 17 June 2009: existence of planets f and g is controversial | ||
23:06, 30 September 2010 | 640 × 768 (3 KB) | Icalanise (talk | contribs) | Update to 6-planet circular orbit solution. The orbit of planet f is too large to appear on this scale. | ||
05:16, 30 September 2010 | 640 × 768 (5 KB) | Tomruen (talk | contribs) | Add planet g as circular orbit, 0.14 AU | ||
21:29, 17 June 2009 | 640 × 768 (5 KB) | Icalanise (talk | contribs) | Added orbit of planet "e" and revised orbit of "d" | ||
14:11, 30 October 2008 | 640 × 640 (5 KB) | Icalanise (talk | contribs) | Hide grid behind info text | ||
14:08, 5 October 2008 | 640 × 640 (5 KB) | Icalanise (talk | contribs) | fix font size bug | ||
13:43, 5 October 2008 | 640 × 640 (5 KB) | Icalanise (talk | contribs) | {{Information |Description={{en|1=SVG image of the Gliese 581 system. The orbital parameters are taken from Udry et al. (2007), A&A 469, L43-L47 "The HARPS search for southern extra-solar planets XI. Super-Earths (5 and 8 M_⊕) in a 3-planet system" and |
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Short title | Orbits of the Gliese 581 system |
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