... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

Next: Analysis Tools for Nebular Emission Lines . ... Extracting spectra from a large number of NICMOS grism images requires a convenient interactive tool which allows a user to manipulate direct/grism image pairs. ... The direct image is used to locate objects of interest, to find the position of the appropriate spectra in the grism image, to determine the optimal extraction technique to use, and to calibrate the wavelength range of the extracted spectra. ... Figure 1: The NICMOSlook User Interface . ...

There are six possible ways of object description: . a) by number(s) . ... d) by list . e) by orbital elements . ... They should be introduced as year, month, day with tenth (e.g. 20021104.1). d) Computations are performed for all objects listed in the file whose path and name should be introduced into assigned data field. ... On pressing Edit file button user has a possibility to look through the list of object elements or their coordinates and velocities to add or to change it. ...

... Classes . ... casa::RefRows . ... Class holding the row numbers in a RefTable . ... RefRows (const Vector < uInt > &rowNumbers, Bool isSliced= False , Bool collapse= False ) . Create the object from a Vector containing the row numbers. ... Convert this object to a Vector<uInt> by applying the given row numbers. ... Get the row vector as is (thus sliced if the object contains slices). uInt . ... Vector < uInt > casa::RefRows::convert . ... const Vector < uInt >& casa::RefRows::rowVector . ...

M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

... This book explains how to use core and client-side JavaScript for version 1.3. JavaScript is Netscape's cross-platform, object-based scripting language for client and server applications. ... Core, Client-Side, and Server-Side JavaScript . ... Client-Side JavaScript . ... JavaScript and Java . ... Examples . ... Conditional Statements . ... Object Manipulation Statements . ... Defining Functions . ... Objects and Properties . ... Indexing Object Properties . ... Defining an Event Handler . ...

... The absolute Galois group of Q, denoted Gal(\bar{Q}/Q) in the sequel, is a fundamental object in arithmetics since it carries a lot of informations about number fields. ... A classical way to study this group is to use p-adic numbers. ... firstly, we will explain the classical d vissage of Gal(\bar{Q_p}/Q_p) based on ramification theory; as a corollary, we will deduce that any finite extension of Q_p is resoluble; . ...

Next: Correspondence Analysis Up: Multivariate Analysis Methods Previous: Cluster Analysis . Discriminant Analysis may be used for two objectives: either љ we want to assess the adequacy of classification, given the group memberships of the objects under study; or we wish to assign objects to one of a number of (known) groups of objects. ... Often the 2-group method is used repeatedly for the analysis of pairs of multigroup data (yielding surfaces for k groups). ...

... AAS 225 . ... Here are a few features of the tweets from the 225th meeting of the American Astronomical Society . ... The retweet numbers are close to the values that Twitter has for the tweets, which means that I can't have messed up too much (I wouldn't expect perfect agreement since Twitter does not guarantee that any search will return all matching tweets; also, the Twitter values are updated whereas mine are fixed until the next set of tweets gets analyzed). The most re-tweeted accounts. ...

... omdetect (omdetect-5.14.2) [?? Meta Index / Home Page / Source Flagging Algorithms Since the object producing a read-out streak may lie outside the image, another algorithm is also used by omdetect. ... nMin = int( 0.6 (ny + 1)) where ny is the number of rows in the image (image height) . ... Loop through all the columns of the image . ... n4 = count(image(i0, :) image(i0 + 1, :) ) Count the number of pixels along column i0 that have a greater value than their neighbour in column i0 + 1 . ...

... Behemoth black hole found in an unlikely place . ... black holes . ... Observing springtime deep-sky objects with a large telescope . ... Could large numbers of black holes account for much of the "dark matter" estimated to exist in our universe? ... NASA, ESA, M.J. Jee and H. Ford (Johns Hopkins University) No, because the universe never had the raw material to grow enough black holes to account for current estimates of dark matter. Get instant access to subscriber content on Astronomy.com! ...

Pulkovo Photographic Plate Database . To find a certain plate, type its number, choose instrument and click button FIND Instrument: Normal Astrograph 26-inch refractor Plate number: . To find plates with a certain sky area: choose instrument, type coordinates (R.A. and Dec.) of the center of this area, type radius of this area, type (optionally) names of required objects, and click button FIND . ...

... Data Reduction FAQ > A number of OmegaCAM filters show vignetting in their central regions. What are the causes for this and what are the dimensions of these features? ... Observing with ESO Telescopes . ... ESO-MIDAS . ... ESO Data . ... ESO HST Image Galleries . ... ESO Data Access Policy . ... ESO Science Newsletter . ... A number of OmegaCAM filters are not monolithic, but consist of four segments (each covering 8 detectors) that have a central cross-shaped support structure. ... Filter . ...

... Asteroid . ... In case you didn't hear about it, which you probably didn't: On Jan. 7, an asteroid 1,000 feet across -- nearly three times the current diameter of Marlon Brando -- barely missed the Earth, which is most likely your planet of residence. ... What if this asteroid had hit the Earth? ... As it happens, the American Astronomical Society was holding a conference in Washington AT THE VERY SAME TIME as the asteroid nearly hit the Earth. ...

... Chapter 4: Solar System Targets > 4.2 Target Identification . ... The following information is required to identify and classify each target. ... For example, separate targets should be defined if you plan to take spectra of several different surface features on a planet, or if you plan to observe the same feature with different timing constraints. ... Description . PLANET . If the target is the center of a planet, enter PLANET followed by its name (e.g., PLANET JUPITER , PLANET SATURN ). ...

... Satellites of the planets are assigned a provisional designation (indicating year of discovery) by the Central Bureau for Astronomical Telegrams ( CBAT ) upon satisfactory demonstration of the existence of a new object. ... In the past, Comets were first given a provisional designation, consisting of the year and a lowercase letter indicating the order of discovery in the year (e.g., 1994a was the first comet discovered or recovered in 1994, 1994b the second, etc.) ... Names .. ...

... Satellites of the planets are assigned a provisional designation (indicating year of discovery) by the Central Bureau for Astronomical Telegrams ( CBAT ) upon satisfactory demonstration of the existence of a new object. ... In the past, Comets were first given a provisional designation, consisting of the year and a lowercase letter indicating the order of discovery in the year (e.g., 1994a was the first comet discovered or recovered in 1994, 1994b the second, etc.) ... Names .. ...

... Classes . ... gTimeSpan Class Reference . ... gTimeSpan (const gTimeSpan &timeSpanSrc) . ... Operation: getDays() This method returns the integer days number stored in the gTimeSpan object. ... Operation: getHours() This method returns the integer hours number stored in the gTimeSpan object. ... Operation: getMinutes() This method returns the integer Minutes number stored in the gTimeSpan object. ... Operation: getSeconds() This method returns the integer seconds number stored in the gTimeSpan...

Download Izmccd (~2.7 MB). ... for 1-5 bytes is number of a numbered minor planet, . ... Positions 1-80 file "mpcreportiz.txt" are similar to positions of file "mpcreport.txt". 83-95 – errors of unit weight, . ... If this tag is " 1 0 " , this record contains results of measurements of an image of object (approximation by "PSF"),  . ... 57-66 – error in X (pixels), for first star in a multicentric image, for subsequent it is error in (distance between first star in the image and this), . ...

HI Self-Absorption (HISA) against warmer background HI emission reveals cold atomic gas along sightlines of sufficient column density. New arcminute-resolution 21cm maps from the Canadian Galactic Plane Survey (CGPS) have uncovered a large population of HISA features beyond the Solar circle. ... Furthermore, the complex CGPS HISA knots and filaments appear morphologically intermediate between HI emission wisps and cold molecular cloud clumps. ...