Minor Bodies in the Outer Solar System:

Magnitudes and Colours

O.R. Hainaut, ESO, H. Boehnhardt, MPS, and S. Protopapa, UMd

Database Tables

MBOSS colour database: colour, absolute magnitude, spectral gradient, dynamical class for each object. mbossData (ASCII)

The mbossData.txt file is formatted with fixed length columns. "#" denotes a comment line. The columns are:

  • Object: name of the object. 1998WW31+B, +C refer to the satellites; Warning: measurements reported for the main body (eg 1998WW31) are likely to include measurements of the object together with its satellite(s).
  • Class: dynamic class of the object, using a classification derived from that of Gladman et al, published in SSBN. See the MBOSS-2 paper for details.
      LPComet: Long Period Comet - SPComet: Short Period Comet - Detachd: Detached Disk object - Scatter: Scattered Disk object - Class-c: Cold Classical Disk object - Class-h: Hot Classical Disk object - Res-3:2: Resonant object on the 3:2 resonance, Plutino - Reson.: Resonant object on another resonance. - JTrojan: Jupiter Trojan - Centaur: Centaur
  • Epo: Number of independent epochs available.
  • M11: Absolute R magnitude (not V), normalized to r = Delta = 1 AU, with no attempt to correct any phase effect.
  • Grt: Spectral gradient, in %/100nm, spectrum normalized to 1 at V.
  • B-V, etc: colours. Other filter combinations are available upon request.
The values listed in the various columns are x/sigma/disp, defined as follow:
  • x is the weighted average of all the available measurements, obtained as
    where x_i and sigma_i are the measurements and error bars published by the individual authors.
  • sigma refers to the total error on the average, obtained as
    where x is the average obtained in [1]. The first term of the square root refers to the combination of the error bars on the individual measurements, and the second to the dispersion of the measurements.
  • disp refers to the dispersion of the measurements, obtained as
    i.e. is the second term of [2]. The disp of Grt is an exception; refer to Hainaut and Delsanti 2002.
Average colours for each physico-dynamical class. mbossClasses (ASCII)
For each colour and each class, 3 values are listed: The number of objects used in the average; the average value, and the dispersion. M11 refers to the absolute R magnitude; Grt to the gradient of the reflectivity spectrum, in %/100nm.
References for each object mbossRef (HTML)
mbossRef (ASCII)
The HTML version comes with links to the papers. In both files, "Counts" refers to the number of measurements included in the database for that object.
Bibliography mbossBib (BitTeX)
Full list of papers from which photometric measurements were used. In most cases, a link to the corresponding ADS page is included. The list uses the A&A mnemonics.

Copyright: You may use the content of these pages, including in publications of any type, provided you make reference to the original paper
Hainaut, Boehnhardt & Protopapa (2012) A&A 546, A115 [ADS | BibTeX | DOI | arXiv | ADS ] and/or point to the online version at http://www.eso.org/~ohainaut/MBOSS , following the Creative Commons Attribution 3.0 Unported License.
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