... The described algorithm is suitable for measurements of complex images of stars. ... a) the zero-based number of stars in the complex (multicentric) image, . b) set of preliminary coordinates - x i , y i , for all stars, index i is number of a star, . ... i - index of a star in the complex image; . ... These parameters are calculated by a nonlinear method of a least squares.The main output parameters of this algorithm are x i , y i ; where the index i is number of a star in the multicentric image. ...

... This year's eclipse is unique in duration. ... Although, at the present time, there are 6 solar observatories belonging to leading space agencies in orbit around the Earth, the eclipse of 22 July, 2009, will only be seen by two of them: the Russian CORONAS-PHOTON satellite equipped with TESIS telescopes and Japan's HINODE satellite fitted with an XRT space telescope. ... TESIS will be the first of the two devices (and the very first on Earth) to witness the solar eclipse. ...

In the regular experiments carried out with the RAS radio telescopes at Pushchino during 1999-2002, the study of the radial dependence of scattering of compact natural radio sources was extended to remote regions of the solar plasma environment. ... The stream in the transalfvenic region displays the same typical radial structure as observed in the transonic region, i.e., the existence of a "precursor" - a narrow band of reduced scattering preceding a wide region of enhanced scattering. ...

. Comment on J0108+0135 . The weak feature 16 mas SW of the core is outside the field of view of Shen et al. (1997). [Note the published paper incorrectly gives the distance as 6 mas.] . VLBApls home page . Last modified: 8 May 2001

Graphic scale for MGD2004 Please for Graphic scale use the distance between Base line D0 and H0 : 111,5 mm in 01.01 - 31.05 112 mm in 01.06 - 31.12

Optimized MASS device for synchronous measurements with Paranal DIMM. ... System 1.2.2 Fabry lens . ... 3.2 Device alignments at the telescop 3.2.1 Fabry lens p osition . ... Optical layout of MASS device in ZY plane . Optical layout of the MASS device in ZX plane MASS segmentator . ... Other values are explained in text. working entrance pupils for the MASS devices can b e defined in reverse light path as the images of these pupil stops pro duced by the Fabry lens + telescop e optical system. ...

The new view on the population of Galactic open clusters A.E.Piskunov1, N.V.Kharchenko2, S.RЖser3, E.Schilbach3, R.-D.Scholz4 1 2 3 4 Institute of Astronomy, Moscow, Russia Main Astronomical ... Observatory, Kiev, Ukraine Astronomisches Rechen-Institut, Heidelberg, Germany Astrophysikalisches Institut Potsdam, Germany What are open clusters and what do they teach us Groups of Population I ... Cluster complexes: OCC-1 = Gould's Belt cluster complex? ...