... The European HST Archive has been moved to ESA's European Space Astronomy Centre ( ESAC ), Spain, where most of ESA's Space Science Archives are located and operated from. ... The Space Telescope European Coordinating Facility (ST-ECF), jointly operated by ESA and the European Southern Observatory ( ESO ) was, until the end of 2010, the European HST science facility, supporting the European astronomy community in exploiting the research opportunities provided by the Hubble Space Telescope. ...

... HST Phase II Proposal Instructions for Cycle 20 > Chapter 3: Fixed and Generic Targets > 3.13 Getting Coordinates Coordinated . ... The proper motions in the Hipparcos output catalogue are also epoch 1991.25, the midpoint of the mission. ... The proper motion in Right Ascension ( RA_PM ) can be in sec. of time/yr, arcsec/yr or mas/yr. ... For such objects, a custom proper motion calculation is recommended to ensure the target will be in the target acquisition aperture at the time of the observation....

BTA Apparent Place to/from FK5 coordinates transformation. (based on procedure published at IAA A.Y. and on IAU SOFA library) . Coordinates( J2000 ): . ... 100 m a : . sec/century) . ... arcsec/century) . for FK5 epoch) . ... arcsec) . ... AP (current moment) .. J2000 (FK5) Get AP(current coordinates) from BTA TCS . ... Mean Sidereal Time: 18:26:1.181 (Apparent=18:26:0.946) . ... J2000) 00:00:00.000 +00:00:00.00 ...

The FITS "World Coordinate System" (WCS) standard defines keywords and usage that provide for the description of astronomical coordinate systems in a FITS image header. ... I: "Representations of world coordinates in FITS" , Greisen, E.W. & Calabretta, M.R. (2002), Astronomy & Astrophysics , 395 , 1061-1075. ... This diagram illustrating Bonne's projection with conformal latitude +35 was produced by WCSLIB , a C implementation of the coordinate transformations defined in the FITS WCS papers. ...

The TCC supports the following coordinate systems: . ICRS: the current RA/Dec standard. The default date of observation is J2000. ICRS is FK5 J2000 (for all practical purposes) but has no date of equinox . ... The date specifies both the date of equinox (usually J2000) and the date of observation . ... The date specifies both the date of equinox and date of observation . ... Warning: the following coordinate systems are rarely used (except Mount for parking the telescope). ...

... Explanations. Each row contains at 0h of Time Dynamical Terrestrial: month, day, apparent right ascension (hours, minutes, seconds), apparent declination (degrees, minutes, seconds), hour difference of declination (seconds), apparent radius (minutes, seconds), equation of time (hours, minutes, seconds), hour difference of equation of time (seconds), time of upper culmination of Sun (hours, minutes, seconds), change in moment of upper culmination when longitude changes on 1 hour to west (seconds). ...

The aim of this section of the course is to familiarise you with celestial Coordinates. ... I found some good notes explaining the celestial coordinate system on the web: . ... 1st Dec: 04hr, 00min In addition to the equatorial coordinates described in the notes above, astronomers also use (at least) two other coordinate systes: galactic coordinates and ecliptic coordinates. ... Ecliptic coordinates use the ecliptic (the Earth's path around the sun) as the equator, and are used for solar system work. ...

... In the above example, the second region uses the global coordinate system (PHYSICAL by default). ... Supported systems include: name description ---- ----------- PHYSICAL pixel coords of original file using LTM/LTV IMAGE pixel coords of current file FK4, B1950 sky coordinate systems FK5, J2000 sky coordinate systems GALACTIC sky coordinate systems ECLIPTIC sky coordinate systems ICRS currently same as J2000 LINEAR linear wcs as defined in file In addition, two mosaic coordinate ...

The Equatorial Inertial (GEI) coordinate system: . The X GEI axis is directed to the point of the spring equinox, . The Z GEI axis is coincide with the Earth's rotation axis, . The Y GEI supplements the right three. The Geographic (GEO) coordinate system: . ... The Solar Magnetic (SM) coordinate system: . ... About space physics coordinate transformation see Russel [1971] and Hapgood [1992] . ... M.A. Hapgood , Space physics coordinate transformations: A user guide // Planet Space Sci. ...

User should choose the type of coordinates and type of positions by marking corresponding radio button, first in the column headed Type and then in the column headed Positions . Rectangular coordinates are compatible only with choice Geometric . ... Remember that photographic or CCD observations are comparable with astrometric positions, whereas meridian observations are comparable with apparent ones. Observations made in horizontal coordinate system also are linked to apparent positions. ...

spaceweb@oulu.fi - last update: 21 December 1998, 1400 UT (RR) . ... This is not as trivial a question as one might think, since it is not enough to know the location with respect to the Earth and/or the Sun in some arbitrary coordinate system. One may have to consider things like differences between the solar equatorial plane and the Earth's orbital plane, the changing direction of Earth's spin axis during the year, and the magnetic dipole orientation. ... Geocentric solar ecliptic . ...

... AstroCC is a coordinate conversion utility for astronomy. It accepts an object designation or the coordinates of an object and calculates coordinates in alternative systems, and at different dates, times, and locations. It also provides lunar and bright planet coordinates to aid in planning observations. ... BJD values may also be retrieved from http://astroutils.astronomy.ohio-state.edu/time/utc2bjd.html which is based on Eastman et al. ... Coordinate data are obtained from SIMBAD. ...

XMM-Newton Science Analysis System . ... Meta Index / Home Page The position of a source on the image ( XPOS and YPOS ) are referred to a coordinate origin in which the pixel at the far-left and bottom of the image has coordinates 1.0, 1.0. The coordinates are computed using the first-order moments of the intensity profile, and the algorithm is similar to that used in the sextractor program (please see the sextractor manual for a detailed discussion). XMM-Newton SOC/SSC -- 2008-10-22 ...

Drift scan are are normally done in coordinates of date (current coordinates). ... The telescope then remains fixed as the sky drifts by. ... Since the az, za is remaining fixed, the drift is being done in current not J2000 coordinates. ... To see how large this change was, a drift scan in J2000 coordinates (15 asecs/sidereal sec epoch J2000) was computed and then the relative motion of the az, za coordinates were plotted. For each day computed: . ... 2005: .5 amin/hour . 2006: .6 amin/hour . ...

... Recent Topics . ... MAO main . ... ASTRONET & APPEC meeting on European Coordination of CMB . ... Jes?s Gallego ( This email address is being protected from spambots. ... Тема: ASTRONET APPEC meeting on European Coordination of CMB . ... APPEC gathering the astroparticle physics European agencies and ASTRONET gathering the astrophysics European agencies organize a workshop, mixing PIs and agencies, to discuss the possibility of a common European policy on CMB studies. ... MAO NASU . ...

... The initial descriptions of the FITS format provided a simplified method for describing the physical coordinate values of the image pixels, but deliberately did not specify any of the detailed conventions required to convey the complexities of actual image projections. ... They were CRPIX n for the reference pixel location on pixel axis n , CRVAL n for the coordinate value at that pixel, CDELT n for the increment at that pixel in the coordinate value, and CTYPE n for the type of coordinate. ...

... Tonight's Sky . ... The Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... The planet has extreme temperature swings and perhaps active lava flows. ... A digital supplement to Astronomy magazine. ... Join TravelQuest International with Astronomy and Discover magazines on one of three great tour options surrounding this celestial spectacle . ... Astronomy Magazine . ...

Euro-Asian Astronomical Society . ... The Olympic Coordinating Council . ... Eva Stefanova BOJUROVA (Bulgaria) . Joao Batista Garcia CANALLE (Brazil) . ... ARMENIA: to be elected . BELORUSSIA: to be elected . BULGARIA: Eva Stefanova BOJUROVA . BRAZIL: Joao Batista Garcia CANALLE . ... ESTONIA: to be elected . FINLAND: to be elected . GREECE: to be elected . ... KAZAKHSTAN: to be elected . ... SWITZERLAND: to be elected . TADZHIKISTAN: to be elected . ...

UNIVERSAL COORDINATES TRANSFORMER . EPOCH1: . EQUATORIAL COORDINATES FOR EPOCH1 . ... rad . ... EPOCH2: . EQUATORIAL COORDINATES FOR EPOCH2: . ... ECLIPTIC COORDINATES FOR EPOCH1 . ... ECLIPTIC COORDINATES FOR EPOCH2 . ... GALACTIC COORDINATES . ... Type initial epoch (epoch1), final epoch (epoch2) and needed coodinates (equatorial a 1 , d 1 for epoch1, ecliptic l 1 , b 1 for epoch1 or galactic l,b) and press corresponding "SUBMIT" (if EPOCH2=EPOCH1, EPOCH2=EPOCH1+10). ...

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. ...