Image:TheKuiperBelt 55AU ClassicalAndPlutinos.svg
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[edit] Summary
Cubewanos and plutinos: orbit distribution. Generated by a program written by Eurocommuter.
██ Plutinos, Neptune trojans and other resonant trans-Neptunian objects
[edit] Main graph
The position of an object represents
- its orbit’s semi-major axis a in AU (horizontal axis)
- orbit’s inclination i in degrees (vertical axis).
The size of the circle illustrates the object’s size relative to others. For a few large objects, the diameter drawn represents the best current estimates. For all others, the circles represent the absolute magnitude of the object. The eccentricity of the orbit is shown indirectly by a segment extending from the left (perihelion) to the aphelion to the right. In other words, the segment illustrates the variations of the object's distance from the Sun. Objects with nearly circular orbits will show short segments while highly elliptical orbits will be represented by long segments.
Main resonances with Neptune are marked with vertical bars; 1:1 marks the position of Neptune’s orbit (and its Trojan asteroids), 2:3 marks the orbit of Pluto (and its moons) etc.
[edit] Histograms
Histograms show the population of objects with the parameter (eccentricity e and inclination i respectively) inside the given interval.1 The population is expressed in % of the total population (vertical axis)
- for inclination, the interval is 5o, i.e. the first bar shows the relative population of objects with i in 0-5o range, the next in 5-10o range etc.
- for the eccentricity e, the interval is 0.1, i.e. the first bar shows the relative population of objects with e in 0-0.1 range (quite circular orbits)
- for semi-major axis a, the interval is 2AU i.e. the first bar shows the relative population of objects with e in 10-12AU range.
[edit] e/i charts
- vertical axis: orbit’s inclination i in degrees, 5o intervals
- horizontal axis: orbit’s eccentricity e; 0.05 intervals
- each small square represents a given range for both the eccentricity e and the inclination i.2
As near circular orbits occupy the first column (e<0.05) and the orbits with the lowest inclination i <5% occupy the lowest row, the square in the bottom left corner represents the number of near circular, very lowly inclined orbits.
- the relative population is represented with ‘cartographic’ colours: (from small numbers plotted as green ‘valleys’ to brown 'peaks'.3 Colors labeled in %.
- a grey square represents a single object (an outlier) in this range.
[edit] Footnotes
1Distribution of plutinos is plotted but excluded from the cubewanos’ histograms.
2As near-circular orbits occupy the first column (e<0.05) and the orbits with the lowest inclination (i<5 degrees) occupy the lowest row, the square in the bottom left corner represents the 'cold population' of near circular, very lowly inclined orbits.
3A grey square represents a single object (an outlier) in this range.
[edit] Data source
Minor Planet Center Orbit database (MPCORB) as of 2007-03-7. Resonant orbits' classification from MPC Circular 2006-X45 (2006-12-21).
| Description |
Orbits distribution: cubewanos and plutinos |
|---|---|
| Source |
Plotted by a program written by the author |
| Date |
2006-02-25; updated 2007-03-22 |
| Author | |
| Permission (Reusing this image) |
see Licence tag |
[edit] Notes
[edit] Licensing
Historique du fichier
Cliquer sur une date et une heure pour voir le fichier tel qu’il était à ce moment-là
| Date et heure | Dimensions | Utilisateur | Commentaire | |
|---|---|---|---|---|
| actuel | 23 mars 2007 à 00:14 | 800×400 (141 Kio) | Eurocommuter | (Data source update after a year.) |
| 25 février 2006 à 18:07 | 800×400 (117 Kio) | Eurocommuter | (Distribution of orbits comrared. By Eurocommuter.) |
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