Image:TheIrregulars Colours.svg

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TheIrregulars_Colours.svg‎ (SVG file, nominally 300 × 300 pixels, file size: 15 KB)

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1 Summary
2 Graph
3 See also
4 Data Sources
5 Licensing

[edit] Summary

Illustration of colour distribution of the irregular satellites of giant planets. Plotted by a program written by Eurocommuter. For reference, three classical KBOs and the centaur Pholus are plotted (grey labels; size not to scale).

The data reported in the quoted sources have the error estimate sometimes close to 10% (one sigma). The two reports differ occasionally on the data for the same object. Given the limited amount and the precision of the data, this diagram does not illustrate all conclusions drawn in papers.

[edit] Graph

Irregular satellites
- Jupiter (red labels)
- Saturn (yellow labels)
- Uranus (green labels)
- For references only: Pholus and three classical KBO (Q=Quaoar), (1),(2) with grey labels [size not to scale]

The position of an object represents the two colour indices
- horizontal axis V-B, blue colour index i.e. the difference in the magnitude of the object observed through a visual (green-yellow) and a blue filter
- vertical axis R-V, red colour index, the difference in the magnitude between red and visual filters
colour (slightly enhanced) represents the hue of the object;
the size of a sphere illustrates the object’s size relative to others.
- for a few large objects, the diameter drawn represents the current estimates (for known albedos)
- for all the others, the diameter represents the absolute magnitude (H)of the object.

[edit] See also

Colours of Centaurs and TNOs.

Centaurs

Colours of TNOs.

[edit] Data Sources

Colour indices for most objects, with the exception listed below

Grav, Tommy; Holman, Matthew J.; Gladman, Brett J.; Aksnes, Kaare Photometric survey of the irregular satellites,Icarus, 166,(2003), pp. 33-45. Preprint

For Himalia, Elara, Leda, Caliban and Sycorax

Rettig, Terrence W.; Walsh, Kevin; Consolmagno, Guy Implied Evolutionary Differences of the Jovian Irregular Satellites from a BVR Color Survey, Icarus, 154, pp. 313-320 (2001).

For the four objects used for comparison:

MBOSS base: Hainaut & Delsanti (2002) Color of Minor Bodies in the Outer Solar System Astronomy & Astrophysics, 389, 641 [1] as of Mar. 13th, 2006

Estimated sizes (illustration only) from Sheppard/Jewitt irregular moons' pages [2]

Description	Colour distribution for the irregular satellites of giant planets
Source	Plotted by a program written by the User:Eurocommuter
Date	10 August 2006
Author	User:Eurocommuter
Permission (Reusing this image)	see Licence tag

[edit] Licensing

I, the copyright holder of this work, hereby publish it under the following licenses:

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation license, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation license".