Minor Bodies in the Outer Solar System:

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.

• x is the weighted average of all the available measurements, obtained as

  [1]

  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

  [2]

  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

  [3]

  i.e. is the second term of [2]. The disp of Grt is an exception; refer to Hainaut and Delsanti 2002.