scholarly journals A Digital Video System for Observing and Recording Occultations

2015 ◽  
Vol 32 ◽  
Author(s):  
M. A. (Tony) Barry ◽  
Dave Gault ◽  
Hristo Pavlov ◽  
William Hanna ◽  
Alistair McEwan ◽  
...  
Keyword(s):  
Solar System ◽  
Dead Time ◽  
Low Cost ◽  
Low Noise ◽  
Recording System ◽  
Outer Solar System ◽  
Main Belt ◽  
Recording Equipment ◽  
The Past ◽  
Solar System Bodies

AbstractStellar occultations by asteroids and outer solar system bodies can offer ground based observers with modest telescopes and camera equipment the opportunity to probe the shape, size, atmosphere, and attendant moons or rings of these distant objects. The essential requirements of the camera and recording equipment are: good quantum efficiency and low noise; minimal dead time between images; good horological faithfulness of the image timestamps; robustness of the recording to unexpected failure; and low cost. We describe an occultation observing and recording system which attempts to fulfil these requirements and compare the system with other reported camera and recorder systems. Five systems have been built, deployed, and tested over the past three years, and we report on three representative occultation observations: one being a 9 ± 1.5 s occultation of the trans-Neptunian object 28978 Ixion (mv =15.2) at 3 seconds per frame; one being a 1.51 ± 0.017 s occultation of Deimos, the 12 km diameter satellite of Mars, at 30 frames per second; and one being a 11.04 ± 0.4 s occultation, recorded at 7.5 frames per second, of the main belt asteroid 361 Havnia, representing a low magnitude drop (Δmv = ~0.4) occultation.

scholarly journals No evidence for interstellar planetesimals trapped in the Solar system

2020 ◽  
Vol 497 (1) ◽  
pp. L46-L49 ◽  
Author(s):  
A Morbidelli ◽  
K Batygin ◽  
R Brasser ◽  
S N Raymond
Keyword(s):  
Solar System ◽  
Oort Cloud ◽  
Giant Planets ◽  
Asteroid Belt ◽  
Interstellar Space ◽  
Fast Decay ◽  
Early Solar System ◽  
The Past ◽  
Solar System Bodies ◽  
Main Asteroid Belt

ABSTRACT In two recent papers published in MNRAS, Namouni and Morais claimed evidence for the interstellar origin of some small Solar system bodies, including: (i) objects in retrograde co-orbital motion with the giant planets and (ii) the highly inclined Centaurs. Here, we discuss the flaws of those papers that invalidate the authors’ conclusions. Numerical simulations backwards in time are not representative of the past evolution of real bodies. Instead, these simulations are only useful as a means to quantify the short dynamical lifetime of the considered bodies and the fast decay of their population. In light of this fast decay, if the observed bodies were the survivors of populations of objects captured from interstellar space in the early Solar system, these populations should have been implausibly large (e.g. about 10 times the current main asteroid belt population for the retrograde co-orbital of Jupiter). More likely, the observed objects are just transient members of a population that is maintained in quasi-steady state by a continuous flux of objects from some parent reservoir in the distant Solar system. We identify in the Halley-type comets and the Oort cloud the most likely sources of retrograde co-orbitals and highly inclined Centaurs.

Solar system astrometry, Gaia, and the large surveys – a huge step ahead to stellar occultations by distant small solar system bodies

2017 ◽  
Vol 12 (S330) ◽  
pp. 397-398
Author(s):  
J. I. B. Camargo ◽  
M. V. Banda-Huarca ◽  
R. L. Ogando ◽  
J. Desmars ◽  
F. Braga-Ribas ◽  
...  
Keyword(s):  
Solar System ◽  
Outer Solar System ◽  
Stellar Occultation ◽  
Stellar Occultations ◽  
Solar System Bodies

AbstractThe stellar occultation technique is a powerful tool to study distant small solar system bodies. Currently, around 2 500 trans-neptunian objects (TNOs) and Centaurs are known. With the astrometry from Gaia and large surveys like the Large Synoptic Survey Telescope (LSST), accurate predictions of occultation events will be available to tens of thousands of TNOs and Centaurs and boost the knowledge of the outer solar system.

Construction of a photometer to detect stellar occultations by outer solar system bodies for the Whipple mission concept

2014 ◽  
Author(s):  
Ralph P. Kraft ◽  
Almus T. Kenter ◽  
Charles Alcock ◽  
Stephen S. Murray ◽  
Markus Loose ◽  
...  
Keyword(s):  
Solar System ◽  
Outer Solar System ◽  
Stellar Occultations ◽  
Solar System Bodies

scholarly journals Commission 20: Positions and Motions of Minor Planets, Comets and Satellites

2005 ◽  
Vol 1 (T26A) ◽  
pp. 153-160
Author(s):  
Giovanni B. Valsecchi ◽  
Julio A. Fernández ◽  
J.-E. Arlot ◽  
E.L.G. Bowell ◽  
Y. Chernetenko ◽  
...  
Keyword(s):  
Solar System ◽  
Minor Planets ◽  
Orbital Elements ◽  
The Past ◽  
Earth Object ◽  
Solar System Bodies

The past triennium has continued to see a huge influx of astrometric positions of small solar system bodies provided by near-Earth object (NEO) surveys. As a result, the size of the orbital databases of all populations of small solar system bodies continues to increase dramatically, and this in turn allows finer and finer analyses of the types of motion in various regions of the orbital elements space.

Radiolysis of N2-rich astrophysical ice by swift oxygen ions: implication for space weathering of outer solar system bodies

2017 ◽  
Vol 19 (35) ◽  
pp. 24154-24165 ◽  
Author(s):  
F. A. Vasconcelos ◽  
S. Pilling ◽  
W. R. M. Rocha ◽  
H. Rothard ◽  
P. Boduch
Keyword(s):  
Solar System ◽  
Ion Irradiation ◽  
Space Weathering ◽  
Outer Solar System ◽  
Oxygen Ions ◽  
Solar System Bodies

We reported results for ion irradiation of N2-rich ices with implications for space weathering of outer solar bodies.

scholarly journals Tholins as coloring agents on outer Solar System bodies

2005 ◽  
Vol 36 (2) ◽  
pp. 178-183 ◽  
Author(s):  
Dale P. Cruikshank ◽  
Hiroshi Imanaka ◽  
Cristina M. Dalle Ore
Keyword(s):  
Solar System ◽  
Outer Solar System ◽  
Solar System Bodies ◽  
Coloring Agents

ICE CHEMISTRY ON OUTER SOLAR SYSTEM BODIES: CARBOXYLIC ACIDS, NITRILES, AND UREA DETECTED IN REFRACTORY RESIDUES PRODUCED FROM THE UV PHOTOLYSIS OF N2:CH4:CO-CONTAINING ICES

2014 ◽  
Vol 788 (2) ◽  
pp. 111 ◽  
Author(s):  
Christopher K. Materese ◽  
Dale P. Cruikshank ◽  
Scott A. Sandford ◽  
Hiroshi Imanaka ◽  
Michel Nuevo ◽  
...  
Keyword(s):  
Solar System ◽  
Carboxylic Acids ◽  
Outer Solar System ◽  
Uv Photolysis ◽  
Solar System Bodies ◽  
Ice Chemistry
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