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Reference Work Entry In depth
Mrkos, Antonín
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Reference Work Entry In depth
Mrkos, Antonín
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Chapter
Impact Risk Communication Management (1998–2004): Has It Improved?
Although scares associated with potential Earth impacts by specific comets and asteroids date back to quite early in the eighteenth and twentieth centuries, respectively (e.g. Marsden 2004), the era of “modern” i...
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Article
Discovery of five irregular moons of Neptune
Each giant planet of the Solar System has two main types of moons. ‘Regular’ moons are typically larger satellites with prograde, nearly circular orbits in the equatorial plane of their host planets at distanc...
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Article
Discovery of 12 satellites of Saturn exhibiting orbital clustering
The giant planets in the Solar System each have two groups of satellites. The regular satellites move along nearly circular orbits in the planet's orbital plane, revolving about it in the same sense as the pla...
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Article
The red ragged edge
Small objects in the Kuiper belt - a zone at the very edge of our Solar System - appear to come in two shades. The redder ones may be furthest from the Sun.
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Chapter and Conference Paper
The Distant Satellites of Uranus and the Other Giant Planets
The steady improvement in our knowledge of the orbits of the two new Uranian satellites is described, including the roles of the 1984 prediscovery images and the 1998 recovery observations. The recognition of ...
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Chapter and Conference Paper
Comet Size Distributions and Distant Activity
We present the results of observations of distant comet nuclei as observed with the Keck II telescope during 1997 December. Our sample included 17 SP Jupiter-family comets, 3 Halley-family comets, and 1 dynami...
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Article
Small Bodies in the Outer Solar System
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Chapter and Conference Paper
Small Bodies in the Outer Solar System
This report is a continuation of three earlier reviews (Marsden 1996a, 1996b, 1998) that included a summary of our orbital knowledge of the Kuiper Belt. Presented at conferences held in the middle of 1994, 1995 a...
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Article
Discovery of two distant irregular moons of Uranus
The systems of satellites and rings surrounding the giant planets in the Solar System have remarkably similar architectures1. Closest to each planet are rings with associated moonlets, then larger ‘regular’ satel...
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Article
A new dynamical class of object in the outer Solar System
Some three dozen objects have now been discovered1,2,3,4,5 beyond the orbit of Neptune and classified as members of the Kuiper belt—a remnant population of icy planetesimals that failed to be incorporated into pl...
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Reference Work Entry In depth
International astronomical union
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Chapter and Conference Paper
Observations — Concluding Remarks
I must speak for all the professional astronomers here in saying that I am most impressed by the contributions made at this IAU Colloquium by amateur astronomers. I spoke earlier of the contacts between amateu...
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Chapter and Conference Paper
Amateur Astronomers and the IAU Central Bureau for Astronomical Telegrams and Minor Planet Center
Of all the sections of the International Astronomical Union the Central Bureau for Astronomical Telegrams is undoubtedly the one that most concerns amateur astronomers. Just about anybody in the world with at ...
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Chapter
Coordination of Minor Planet Orbital Studies: Past, Present and Future
A brief account is given of the coordination of astrometric observations and orbital studies of minor planets, particularly with regard to the role played in the past by the Astronomisches RechenInstitut. The ...
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Article
Coordination of minor planet orbital studies: Past, present and future
A brief account is given of the coordination of astrometric observations and orbital studies of minor planets, particularly with regard to the role played in the past by the Astronomisches Rechen-Institut. The...
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Chapter and Conference Paper
Supernovae up close
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Article
The Minor Planet Center
The history and current status of the Minor Planet Center are described, and thoughts are presented on future plans for the Center.