Recent Observations of Plutos System Probing Pluto's Atmosphere, - - PowerPoint PPT Presentation

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recent observations of pluto s system probing pluto s

Recent Observations of Plutos System Probing Pluto's Atmosphere, - - PowerPoint PPT Presentation

Mar 07, 2023 258 likes •574 views

Recent Observations of Plutos System Probing Pluto's Atmosphere, Charon's Size and Orbital Elements Bruno Sicardy Observatoire de Paris - LESIA & Universit Pierre et Marie Curie ESOP XXXI meeting Pescara 24-27 August 2012

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Recent Observations of Pluto’s System Probing Pluto's Atmosphere, Charon's Size and Orbital Elements

Bruno Sicardy Observatoire de Paris - LESIA & Université Pierre et Marie Curie ESOP XXXI meeting Pescara 24-27 August 2012

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Doressoundiram & Lellouch, "Aux confins du système solaire"

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 radius, shape & limb features at kilometric accuracy  density, if mass known from satellite motion ---> internal

structure

 albedo ---> composition, state of surface  if double occultation primary/secondary: accuracy ~ 10 km,

e.g. Pluton/Charon ---> better orbital elements airless Trans-Neptunian Objects (TNO's)

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 density & temperature profiles down to nbar levels  variations with time  detection of activity ( e.g. gravity waves)  zonal winds measurements through central flash  haze properties through chromatic dependence

TNO's with atmosphere

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Geometry of the double occultation 22 June 2008

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circumstances of the double occultation of 04 June 2011: Charon

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circumstances of the double occultation of 04 June 2011: Pluto

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La Silla/Chile 60cm San Pedro de Atacama/Chile 50cm Pico dos Dias/Brazil 160cm Santa Martina/Santiago/Chile 40cm

the double Pluto/Charon event 4 June 2011, S. America

Charon/airless Pluto/atmosphere

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R= 602.0 km (vs. 603.6 km in 2005)

the double occultation of 04 June 2011: Charon

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Sicardy et al. 2011 JPL #017 Tholen et al. 2008 HST-based Buie et al 2012 HST-based

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PrePredicted ~ one week before

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Observed

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Pluto stellar occultation, 18 july 2012 ESO Very Large Telescope, NACO, H band before the event, without AO after the event, with AO Charon star Pluto’s motion Charon Pluto star Pluto

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gravity waves

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summer winter AAT 12 June 2006 VLT 18 July 2012