... The first column shows the kinematical diagrams, where is the angle between the line of sight on the object and the vector of rotation about Z -axis, and V S is objects line-of-sight velocity relative to an observer at rest at the position of the Sun. The straight lines are regression fits, whose slopes yield the subsystem’s rotation rate. The second column shows the relations between metallicity and distance from the Galactic plane. ... privious figure | next figure . ...

... The HST uses an onboard model of its orbit to perform in real-time various control functions relating to spacecraft operations and observation support. ... New coefficients for the ephemeris are updated every other day, and are archived as FITS keywords for each HST observation data set. Using these coefficients,an observer can perform a variety of calibration and characterization calculations relating to the orbital position and velocity of the telescope. ...

This widget allows you to offset the telescope. ... Offset type : one of "Object Arc", "Object Arc XY" or "Boresight". ... This is motion on the sky or instrument, so don't worry about cos(dec). ... If you want to move that point (e.g. center your object along a different bit of the slit), then use a boresight offset. ... Note that a +X object xy offset will move the sky in the -X direction on the focal plane, because you are centering something in the +X direction on the boresight. ...

makeasn -- Group images in "associations" makeasn *cal.fits . ... The output are calnicb type "associations" tables. These tables contain the names of the images in each group, and the relative offset of the images in pixels. These files can be used to co-add iamges either with calnicb or with asncombine. ... In addtion, the observing time as well as the relative orientation of the imgages can be used as a criterion for an images to be included in a group. ...

... The CAPTION element is used to label a table or figure. Use the align attribute to specify the position of the caption relative to the table/figure. ... CLASS . ... The CLASS attribute is most commonly used to attach a different style to some element, but it is recommended that where practical class names should be picked on the basis of the element's semantics, as this will permit other uses, such as restricting search through documents by matching on element class names. ... ALIGN . ...

Set the display of the status bar, tool bar, locator bar, and properties associated with the display of the pointer position in the Locator bar. ... Set fixed point . ... When the fixed point is set, and the display format is (DX, DY), (DIST), or (R, Theta) then give the location relative to the fixed point. ... Set the fixed point to (0.0, 0.0). ... DX, DY] Display the delta in X and Y of the position of the mouse relative to the fixed point, or (0, 0) if no fixed point has been selected. ...

General Knowleges about Astrometry. ... Universal Tool, Meridian Tool, Meridian Circle, Vertical, Photografic Zenithal Telescope, Astrolabe, Zenith Telescope, Horizontal Meridian Circle, etc. Meridian Principle of Objects' Coordinates Determination. ... Absolute and Relative Methods of Coordinates Determination. ... Photografic Method in Astrometry. Telescopes for Position Observations by Photografic Method. ... Basis and Theory of Photografic Method of Coordinates Determination. ...

... Q 12.649 0.523 0.342 -0.108 4444 -4.647 -4.582 "n6231_ 178" 16 53 48.63 -41 51 54.1 J2000.0 ! ... A few lines are then added to the top (see readme_asc2dxf for details) to produce input for asc2dxf :in.coo: n6231cp6.dxf slot line 2.00 43.00 9.00 43.00 point 9.773 19.026 n6231 _ 171 Q 12.649 11.236 57.382 n6231 _ 178 I 14.533 ... the output of this program is as follows :n6231cp6.dxf: 0 SECTION 2 ENTITIES 0 CIRCLE 8 1 62 3 10 43.00 20 43.00 30 0.000 40 43.00 0 ...

... Participants . ... Traditionally, the workshop takes place at three locations: the Independent University of Moscow (3 days), the Steklov Mathematical Institute (2 days) and the Higher School of Economics (1 day). ... Organizing Committee: Leonid Chekhov (Steklov and Poncelet), Sergei Lando (HSE), Igor Krichever (HSE and Columbia Univ.) ... This covers also the welcome party and the conference dinner. ... Go to the Laboratoire Poncelet home page. to the Steklov Mathematical Instutute home page. ...

UFO Forum Message . Forums: . ... Post . ... It Really Is Relative . ... Post Message | ... If you are on the Earth the moon does not rotate around its own axis. ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

M55 Color Magnitude Diagram . ... B.J. Mochejska , J. Kaluzny ( CAMK ), 1m Swope Telescope Explanation: This color "picture" of globular star cluster M55 may not look like any star cluster you've ever seen. ... In the picture, a Color Magnitude Diagram (CMD), M55's individual stars are represented as dots whose color indicates relative temperature, red (cool) to blue (hot). ... The broad swath extending diagonally from the lower right is the cluster's main sequence . ... Specific rights apply . ...

... Search system . ... Forget-Me-Not" information and searching system is developed to store and to work with unstructured fascimile electronic copies of paper documents (e.g., books, newspapers, incoming and outcoming business documents, etc.) as well as text documents in Windows 95/98/NT environment. ... Incoming text documents are converted by means of the Box Manager, which is a part of the "Forget-Me-Not" information system, into a dynamic archive - a storage of the text information images. ...

... Between them, the following points are touched: ICRF-2 structure, ICRF Core sources selection, and some expected user's requirements. ... Suggested total number of sources is close to the number of sources already observed in the IVS and VCS sessions, and for most of them reliable positions are derived, mostly for declination > -40 deg. ... So, results of source position time series analysis heavily depend on method used for time series computation and should be used with care. ...

ABSOLUTE PROPER MOTIONS OF 331 OPEN CLUSTERS . ... The proper motions of stars in the fields of 331 open clusters were taken from Four-Million Star Catalog (4M-catalog) of positions and proper motions (Volchkov et al. ... The absolute proper motions for 21 young open clusters have been derived by comparison of precise relative proper motions of individual stars and their corresponding absolute proper motions. ... Sign of proper motions in RA . ... 0.0001 arcsec/yr . ... rms error in RA proper motion . ...

... We publish 16 Doppler imaging temperature maps for the years 1994-2002 of the active RS CVn star II Peg. ... Through Doppler imaging we want to study the spot evolution of the star and in particular compare this with previous results showing a cyclic spot behaviour and persistent active longitudes. ... The derived temperature maps are quite similar to the ones obtained earlier with a different methods, the main differences occurring in the spot latitudes and relative strength of the spot structures....

... Impedance . Electrical impedance, or simply impedance, describes a measure of opposition to a sinusoidal alternating current (AC). Electrical impedance extends the concept of resistance to AC circuits, describing not only the relative amplitudes of the voltage and current, but also the relative phases. ... Resistance is the real part of impedance; a device with a purely resistive impedance exhibits no phase shift between the voltage and current. ...

... Electric field is a potential heat source for ionospheric particles (Rees, 1989). It is due to the fact that, under the action of an electric field, charged particles drift relative to one another and relative to neutral particles. ... This is called frictional heating. ... However, the effect of frictional/Joule heating of neutrals in the auroral electrojet region can lead to upward neutral wind in a region of high electron densities and strong electric fields (Winser et. al., ...

. 117. Casas R., Krasinsky G. A., Yagudina E. I. ССD observations of relative positions of Galilean satellites of Jupiter and star 104297 Hipparcos (1997 November 12 - 14). Приводятся результаты обработки наблюдений относительных положений галилеевых спутников Юпитера и звезды 104297 из каталога Hipparcos, выполненных во время тесного соединения 12 - 14 ноября 1997 г., а также координаты 38 троек звезд из Hipparcos, для которых взаимные угловые расстояния не превышают 500 .

RTT150 . ... The primary mirror 1 reflects light to the secondary mirror 2 which sends the converging beam of light to the system of four flat mirrors 3, 4, 5 and 6. That allows the beam of light to leave the telescope strictly along its polar axis and be collected in Coude focus. ... That's why at any tube position (for any rotation along the declination axis) beam of light parallel to the principal axis after reflection on mirror 3 follows the direction of declination axis. ...

... Our Galaxy . ... Stars . ... Image credit: ESO, Acknowledgement: VST/Omegacam Local Group Survey) . First observed in 1909, the WLM galaxy is part of the Local Group, about 10 million light years (3.1 Mpc) across, this is the set of more than 35 galaxies which includes our own Milky Way. ... I compared this little galaxy to a living fossil because looking at it gives us an insight into a past era in the UniverseтАЩs history. ... Distances and metallicities for 17 Local Group galaxies? . ...