Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, Epiciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

Perturbation of the Mars atmosphere by the near-collision with Comet C/2013 A1 (Siding Spring)

Abstract : The martian upper atmosphere could be strongly perturbed by the near collision with Comet C/2013 A1 (Siding Spring). Significant mass and energy will be deposited in the upper atmosphere of Mars if the comet coma is sufficiently dense. We predict that comet H2O production rates larger than 1028 molecules/s would produce temperature increases exceeding 30 K and the H density in the upper atmosphere will approximately double. The temperature perturbation will persist for several hours and the increased H density for tens of hours. Drag on orbiting spacecraft may increase by substantial factors, depending upon comet activity, because of the thermal perturbation to the atmosphere. Observation of these perturbations may provide insight into the thermal and chemical balances of the atmosphere.
Document type :
Journal articles
Complete list of metadata
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Thursday, March 24, 2022 - 2:07:31 PM
Last modification on : Friday, March 25, 2022 - 4:03:18 AM




Roger V. yelle, A. Mahieux, S. Morrison, V. Vuitton, S. M. Hörst. Perturbation of the Mars atmosphere by the near-collision with Comet C/2013 A1 (Siding Spring). Icarus, 2014, 237, pp.202-210. ⟨10.1016/j.icarus.2014.03.030⟩. ⟨insu-03618552⟩



Record views