Comet C/2013 A1 (Siding Spring) as seen with the herschel space observatory

Cs Kiss, T. G. Müller, M. Kidger, P. Mattisson, G. Marton

Research output: Contribution to journalArticle

1 Citation (Scopus)


The thermal emission of comet C/2013 A1 (Siding Spring) was observed on March 31, 2013, at a heliocentric distance of 6.48 au using the PACS photometer camera of the Herschel Space Observatory. The comet was clearly active, showing a coma that could be traced to a distance of ∼1000″, i.e. ∼50 000 km. Analysis of the radial intensity profiles of the coma provided a dust mass and dust production rate and the derived grain size distribution characteristics indicate an overabundance of large grains in the thermal emission. We estimate that activity started about 6 months before these observations at a heliocentric distance of ∼8 au.

Original languageEnglish
JournalAstronomy and Astrophysics
Publication statusPublished - Feb 1 2015


  • C/2013 A1 (Siding Spring) - Comets
  • General
  • Individual
  • Photometric-comets
  • Techniques

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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