2,313 Hits in 6.4 sec

Lifetime and Dynamics of Natural Orbits around Titan

Lucas S. Ferreira, Rafael Sfair, Antônio F. Bertachini A. Prado
2022 Symmetry  
Considering the growing interest in sending probes to the natural satellite Titan, our work aims to investigate and map natural orbits around this moon.  ...  Lifetime maps were generated for different initial configurations of the orbit of the probe, which were analyzed in different scenarios of orbital perturbations.  ...  Conflicts of Interest: The authors declare that they have no conflict of interest in terms of research institutions, professionals, researchers, and/or financial supports.  ... 
doi:10.3390/sym14061243 fatcat:k2dwrzx4bndujjusfkp3m5cjfu

Collisional processes and transfer of mass among the planetary satellites

S. Marchi, A. Dell'Oro, P. Paolicchi, C. Barbieri
2001 Astronomy and Astrophysics  
impact, and then the mean lifetime of a fragment before impacting the target, as well as the distribution of the relative velocity.  ...  These formulae allow a preliminary discrimination of the interesting cases. The pair Hyperion-Titan and the Uranus system have been analyzed in detail.  ...  We discussed the first ideas of this work with Paolo Farinella, who is recently deceased. We thank Francesco Marzari (Padua University) for remarks and suggestions.  ... 
doi:10.1051/0004-6361:20010803 fatcat:22ao7h7ubnexdnxydc6pjzkjge

The Science Case for a Titan Flagship-class Orbiter with Probes [article]

Conor A. Nixon, James Abshire, Andrew Ashton, Jason W. Barnes, Nathalie Carrasco, Mathieu Choukroun, Athena Coustenis, Louis-Alexandre Couston, Niklas Edberg, Alexander Gagnon, Jason D. Hofgartner, Luciano Iess (+27 others)
2020 arXiv   pre-print
The orbiter would enter a stable polar orbit around 1500 to 1800 km, from which vantage point it would make global maps of the atmosphere and surface.  ...  Investigating Titan from the unique standpoint of a polar orbit would enable comprehensive global maps to uncover the physics and chemistry of the atmosphere, and the topography and geophysical environment  ...  Total operational lifetime would be several hours, sufficient to record data from the seas and relay back to the orbiter.  ... 
arXiv:2008.05680v1 fatcat:c2hpzwxox5esddyt6c45w4duou

Spin-Orbital Excitation Continuum and Anomalous Electron-Phonon Interaction in the Mott InsulatorLaTiO3

C. Ulrich, G. Khaliullin, M. Guennou, H. Roth, T. Lorenz, B. Keimer
2015 Physical Review Letters  
and orbitals.  ...  The electronic continuum and the marked renormalization of the phonon lifetime by the onset of magnetic order are highly unusual for Mott insulators and indicate liquid-like correlations between spins  ...  Since the direct orbital-phonon coupling constant, g, is generically larger than the exchange-modulation parameter J , the short electron-phonon lifetimes and their spin-sensitivity are naturally explained  ... 
doi:10.1103/physrevlett.115.156403 pmid:26550738 fatcat:rmios5rj4vb4bm3vfiexm64iyy

TandEM: Titan and Enceladus mission

A. Coustenis, S. K. Atreya, T. Balint, R. H. Brown, M. K. Dougherty, F. Ferri, M. Fulchignoni, D. Gautier, R. A. Gowen, C. A. Griffith, L. I. Gurvits, R. Jaumann (+144 others)
2008 Experimental astronomy (Print)  
One spacecraft would be an orbiter with a large host of instruments which would perform several Enceladus flybys and deliver penetrators to its surface before going into a dedicated orbit around Titan  ...  TandEM was proposed as an L-class (large) mission in response to ESA's Cosmic Vision 2015-2025 Call, and accepted for further studies, with the goal of exploring Titan and Enceladus.  ...  We are also grateful to Sylvain Cnudde for considerable artistic work on TandEM, and to SIGAL@LESIA.  ... 
doi:10.1007/s10686-008-9103-z fatcat:tq6jrgdanbc7nfunov5z77m3tm

A new perspective on the irregular satellites of Saturn - I. Dynamical and collisional history

D. Turrini, F. Marzari, H. Beust
2008 Monthly notices of the Royal Astronomical Society  
We took advantage of the Hierarchical Jacobian Symplectic algorithm to include in the dynamical model of the system also the gravitational effects of the two outermost massive satellites, Titan and Iapetus  ...  We have performed detailed N--Body simulations using the best orbital data available and analysed the frequencies of motion to search for resonances and other possible perturbing effects.  ...  The differences between the four cases argue for the chaotic nature of Kiviuq's dynamical evolution. Titan and Iapetus intervene altering the dynamical history of the satellite.  ... 
doi:10.1111/j.1365-2966.2008.13909.x fatcat:yvdjcxvrvfg55i6zj6wk7tkelu

An Empirical Model of Titan's Magnetic Environment During the Cassini Era: Evidence for Seasonal Variability

Slawa Kabanovic, Sven Simon, Fritz M. Neubauer, Zachary Meeks
2017 Journal of Geophysical Research - Space Physics  
We determine the occurrence rate of each magnetic environment category along Titan's orbit as a function of Saturnian season and local time.  ...  Observations from Cassini's close Titan flybys as well as 191 nontargeted crossings of Titan's orbit are taken into account.  ...  The authors would like to thank Alexandre Wennmacher (University of Cologne) for processing of Cassini magnetic field data from Titan flybys T120-T126.  ... 
doi:10.1002/2017ja024402 fatcat:zboks5zb6jdpho4ws56tgwjmai

Atmospheric Planetary Probes and Balloons in the Solar System

A Coustenis, D Atkinson, T Balint, P Beauchamp, S Atreya, J-P Lebreton, J Lunine, D Matson, C Erd, K Reh, T R Spilker, J Elliott (+2 others)
2011 Proceedings of the Institution of Mechanical Engineers. Part G, Journal of Aerospace Engineering  
Hereafter, the authors discuss in situ exploration science drivers, mission architectures, and technologies associated with probes at Venus, the giant planets and Titan.  ...  and evolution of our own solar system as well as extra-solar planetary systems.  ...  This mission's goal is the study of the Saturn system and particularly its satellite Titan (Fig. 3) . Cassini is an orbiter developed by NASA, which entered orbit around Saturn in July 2004.  ... 
doi:10.1177/2041302510393099 fatcat:wms2a3jaobgapkh3sxs2ud3gxm

Unusual origin, evolution and fate of icy ejecta from Hyperion

Alexander V Krivov, Marek Banaszkiewicz
2001 Planetary and Space Science  
The orbits liberated from the resonance become unstable and experience multiple close approaches to Titan.  ...  Particles locked in resonance form an arc-like structure along the Hyperion orbit centred on Hyperion's position; this "Hyperion swarm" is populated by grains of tens of micrometres in size and might be  ...  Acknowledgements We thank Michael Belton and Jean-Marc Petit for thorough reviews and Jim Howard for improving the style of the manuscript.  ... 
doi:10.1016/s0032-0633(01)00069-1 fatcat:qlykeumikra5tkhxttldfkfkja


Matija Ćuk, Luke Dones, David Nesvorný
2016 Astrophysical Journal  
We speculate that this disk has formed through orbital instability and massive collisions involving the previous generation of Saturn's mid-sized moons.  ...  As an extremely slow-evolving system is incompatible with intense tidal heating of Enceladus, we conclude that the moons interior to Titan are not primordial, and we present a plausible scenario for the  ...  However, close encounters followed by a collision with Titan would perturb the orbits of both Titan and Hyperion.  ... 
doi:10.3847/0004-637x/820/2/97 fatcat:zjrpb35bjfb4hf3nuule4ulcpm

The formation and evolution of Titan's winter polar vortex

Nicholas A. Teanby, Bruno Bézard, Sandrine Vinatier, Melody Sylvestre, Conor A. Nixon, Patrick G. J. Irwin, Remco J. de Kok, Simon B. Calcutt, F. Michael Flasar
2017 Nature Communications  
Acknowledgements This work was funded by the UK Science and Technology Facilities Council, the UK Space Agency, and the NASA Cassini Mission.  ...  T he Cassini spacecraft orbited Saturn from 1 July 2004 to 15 September 2017 and in total made 127 Titan flybys, providing coverage of nearly half of Titan's 29.5-year orbit around the Sun.  ...  Note that the temporal coverage of CIRS observations is not continuous as it depends on Cassini's orbital geometry, so there is no limb coverage of the south pole in 2013 and 2014 NATURE COMMUNICATIONS  ... 
doi:10.1038/s41467-017-01839-z pmid:29162820 pmcid:PMC5698511 fatcat:ynkjdbzux5g4npetxhbwhpwyxu

Effective stability around the Cassini state in the spin-orbit problem

Marco Sansottera, Christoph Lhotka, Anne Lemaître
2014 Celestial mechanics & dynamical astronomy  
In addition, we study the dependence of the effective stability time on three relevant physical parameters: the orbital inclination, i, the mean precession of the ascending node of Titan orbit, Ω̇, and  ...  By extensively using algebraic manipulations on a computer, we explicitly apply our method to the rotation of Titan.  ...  Acknowledgements The work of C. L. was financially supported by the contract Prodex C90253 "ROMEO" from BELSPO, and partly by the Austrian FWF research grant P-J3206. The work of M.  ... 
doi:10.1007/s10569-014-9547-6 fatcat:zjhnzdadzzagdfabvckpwmobou

How to explore planets with drones

Sofie Macdonald, Adam Stevens
2018 Astronomy & Geophysics  
An orbital platform can use cameras, altimeters and 3.19 spectrometers to map the terrain and fea tures of wide regions of a planet.  ...  Venus has a surface temperature of around 460 °C, highspeed winds, lightning and rain of concentrated sulphuric acid.  ... 
doi:10.1093/astrogeo/aty145 fatcat:tm2irrjn2jaafce27w7qsji2te

NASA'S RPS Design Reference Mission Set for Solar System Exploration

Tibor S. Balint
2007 AIP Conference Proceedings  
These are the Multi-Mission Radioisotope Thermoelectric Generator (MMRTG), with static power conversion; and the Stirling Radioisotope Generator (SRG), with dynamic conversion.  ...  , and provide an understanding of fuel need trades over the next three decades.  ...  The opinions expressed here are those of the author only and do not necessarily reflect the positions of the National Aeronautics and Space Administration or the Jet Propulsion Laboratory / California  ... 
doi:10.1063/1.2437502 fatcat:nqxkylshsbdghpslhc5te2p7mq

Titan-Hyperion Resonance and the Tidal Q of Saturn [article]

Matija Ćuk, Luke Dones, David Nesvorný
2013 arXiv   pre-print
This result is controversial and implies recent formation of at least some of the mid-sized icy moons of Saturn.  ...  We find that the survival of the Titan-Hyperion resonance is in agreement with a past Titan-Iapetus 5:1 resonance, but not with unbroken tidal evolution of Rhea from the rings to its current distance.  ...  Conclusions We show that the low tidal Q of Saturn found by Lainey et al. (2012) is strongly supported by the existence of the Titan-Hyperion 4:3 resonance (cf. Greenberg et al. 1972) .  ... 
arXiv:1311.6780v1 fatcat:zyt4fbi3afg3jcnsaafpumrabi
« Previous Showing results 1 — 15 out of 2,313 results