... 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 . ...

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 . ...

... A multi-dimensional binary search tree, k-d tree, is proposed to support range queries in multi-key data sets. The algorithm can been used to solve a near neighbors problem for objects in a 19 million entries star catalog, and can be used to locate radio sources in cluster candidates for the X-ray/SZ Hubble constant measurement technique. ... The choices for the problem at hand were narrowed down to two : a Multidimensional k-ary Search Tree (MKST) and a k-dimensional (k-d) tree. ...

... For the past years I have been working on the problem of synthesis of light curves of close binary systems, consisting of a normal star and a compact object (point object with fixed X-ray luminosity). ... Possible existence of a bright spot on the disk's lateral surface is taken into account. ... The last of then will be published in Gordon and Breach Publishers ( Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ... Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ...

The FITS archive & data processing pipelines . ... The archived data are broad band images (BBI) and long-slit spectra (LSS) plus their associated template and calibration files. The data in HFA can enter into the HyperLeda processing pipeline and the results can be freely downloaded. ... Definition of the file system (structure of the archive) . ... The coordinate systems must be updated when the data (pixel data, other keywords, related tables) are altered (eg. rebinning of the image). ...

... Classes . ... Classes and global functions for general use. ... Binary search a sorted, linear, data structure. ... casa::Copy_global_functions_throw . ... Internal Utilities_module classes and functions. ... This module is a bag of unrelated mini-modules, classes and global functions. ... A signature for comparison functions is defined (required for comparison functions used in the Sort class), and one such function is provided. objcopy/objmove/objset copies objects from one place to another. ...

... LABORATORY OF RADIO ASTRONOMICAL OBSERVATIONS . Radio sources identification is one of the most important tasks of the current radio astrophysics. ... Optical idetification. ... Optical identifications of subsample of steep spectra radio sources from RC catalog using 6m SAO telescope of SAO RAS: optical observations. ... Astronomy Reports. ... Identification of radio sources with data of various radio catalogs allows one to construct continual spectrum of the object and its radio structure. ...

The picture above was made with this demo POV file and this pen object POV file . ... The cap and pen are separate objects; put together in their default orientation, the pen is "closed". ... The "clip" of the cap is rounded on the inside, and tapers to a point, and also tapers away from the pen, just like the real object. ... The cap is 0.18 units in diameter, the little ridge is 0.197 units in diameter, and the clip extends up to 0.26 units above the central axis. ...

HUBBLE SPACE TELESCOPE DAILY REPORT #1278 PERIOD COVERED: 0000Z Daily Status Report as of 339/0000Z 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Completed WF/PC-2 5235 (Structures of Quasars and Related Objects (WC10): Cycle 4) The WF/PC-2 was used to make long exposure observations of quasar B21425+267. ... 1.10 Completed WF/PC-2 5416 (Young Globular Clusters in Merger Remnants: Cycle 4 Medium) The WF/PC-2 was used to make images of the galaxy NGC-3610 looking for young globular clusters. ...

... Current APO Weather . ... Search Site . ... Information for New Users . ... Technical Staff pages . Night Logs and Mailing Lists (maintained by APO) . ... Technical Documents and Database Search . ... Observer's Documentation and Procedures . ... Problem Reporting and APO Technical Documents Database Search . ... APO Drawing/Document Management Procedures . ... APO Technical Documents Database Search . Home Astrophysical Research Consortium . ... Mail Lists (maintained by APO) . ...

IV International Astronomy Olympiad . ... Text of these problems is available also . ... To solve every problem you may use constants and well-known values you know by heart. ... The apparent diameter of the Moon, as seen from the Earth, is 31'. ... Can you observe a star with magnitude . ... Consider the stars as black bodies. ... Estimate the diameter of a black hole constructed using this patent from a ship with the mass of 5000 tn (1 tn = 1000 kg). ... What stars would you observe this nigth? ...

... R.A. = 00h55m04s.86, Decl. = -37 41'43".7 . ... Variable star in NGC 1511 . ... Variable star near Pegasus 2001bn IAUC 8624 BV anon 2001bh 7622 K star ugc11635 2001dh 7482 M star ic5374 1999db 7227 QSO anon 1999dc 7227 AGN anon 1999cx 7210 AGN anon 1999cu 7210 AGN anon 1999bs 7141 cat var ugc11093 1998di 6982 dwarf nova anon 1993U 5818 QSO anon 1993V 5818 QSO anon 1992W 5517 M star mcg 8-23-96 1992X 5517 M star mcg 6-32-24 1991ap 5327 QSO anon 1989Z 5162 var ngc4013 1985J 4059 CV ugc6274 ? ...

... Development of Ideas of Structure and Evolution of Stars. Integral Features of Stars, Which Determine Their Structure, Direction and Rate of Evolutuion. ... Connection between Potential and Thermal Energy of Star. ... Structure of a Main Sequence Star. Features of Massive Stars Evolution on the Main Sequence. Internal Structure of the Sun. ... White Dwarfs, Their Features. ... Evolution from the Main Sequence of Massive Stars. ... Evolution of Small Mass Stars till White Dwarfs Sequence. ...

Pulkovo NEO Page . ... EPOS Software Package . ... EPOS ( E phemeris P rogram for O bjects of the S olar system) is the Windows PC application for study and ephemeris support of observations of the Solar system objects. ... It controls the part of common data and transfers the control to one of the programs that solve the restricted set of tasks. ... So with the EPOS software package one can calculate the accurate ephemerides for many objects and get the quick illustration of their motion as well. ...

... Staff . Research staff . ... Staff in alphabetic order . ... Star formation . ... Historical highlights . ... Accretion disks in luminous young stellar objects . ... Accretion disks in luminous young stellar objects т?? published on Astronomy & Astrophysics Review (2016, 24, 6) , M. T. BeltrУЕn (INAF-Arcetri Observatory) and W. J. de Wit (ESO-Chile) discuss the observational evidence of the existence of such accretion disks around young luminous stars in embedded and optically revealed phases . ...

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. ...

... country name . ... Query " Moscow's celebrations hotel Moscow, Russia" would failed if search attributes separately, but could be succeeded if search their concatenation. ... hotel". ... Simple search for "Moscow": # select name, country, place, rank( idx, ftsquery ) as r from hotels, to_tsquery('Moscow') as ftsquery where idx @@ ftsquery order by r desc; name | ... Query "Moscow hotel" (rewritten by hand): # select name, country, place, rank( idx, ftsquery ) as r from hotels, to_tsquery('Moscow | ...

... Structure of Data . ... Catalog . ... In SAI OCL Catalog, we introduce our work on investigation of the Milky Way system of open star clusters. The main goal of our study is a search for new clusters using huge surveys. 168 new clusters have been already discovered by us using J,H,Ks data from 2MASS point source catalog. ... For 141 new clusters, we found their physical parameters using J,H,Ks data from 2MASS catalog and, for a number of clusters, our UBVRI CCD observational magnitudes. ...

Turning the Camera Skyward . A reconfigured camera can take wide-field exposures of astronomical objects (constellations, the Milky Way, zodiacal light, moving artificial satellites, meteor showers, variable stars, etc.) to reveal much fainter objects and structures than seen by naked eye. ... This picture reveals objects more than 2.5 times fainter than can be seen by the naked eye, including not only stars but also the Orion nebula (M42), where new stars are being born. ...

Astronomy Picture of the Day . Is Mystery Object an Orphan Afterglow . ... 12.11.2001 . ... SDSS , DOE , NSF , NASA Explanation: What is that unusual object? ... Attributes of the object include that it has unusual colors , appears to be fading as months go by, and appears to be associated with a distant galaxy . ... U. Based on Astronomy Picture Of the Day . Publications with keywords: orphan afterglow - mystery object . Publications with words: orphan afterglow - mystery object . ...