The Second U.S. Naval Observatory CCD Astrograph Catalog ( UCAC2 ) Table of Contents 1) Introduction 2) Summary of the Project a) Observations and Instrumentation b) Reductions of UCAC Observations c) Computation of Proper Motions 3) Properties of the Catalog and Important Notes For the User a) Sky Coverage b) Completeness c) Positions, Proper Motions and Error Calculations d) UCAC2 Magnitudes e) 2MASS Photometry f) Non-stellar ... All stars in the UCAC2 have proper motions. ...

Электронная библиотека астронома-любителя. ... архив RSN . ... Ru.Space.News: . Апрель 1998 . ... Дата: 28 апреля 1998 (1998-04-28) От: Alexander Bondugin Тема: Cassini Update - April 26, 1998 Привет всем! ... The web site also contains some audio files, including a recording of the Mode-S beacon which plays for 20 seconds. ... During the period 1998-Mar-21 to 1998-Apr-15, excellent signals have once again been received from the 145.826 MHz beacon. ... The 435.025 MHz beacon is normally off. ...

GCVS Variability Types and Distribution Statistics of Designated Variable Stars According to their Types of Variability ======================================================================== I. GCVS Variability Types. ... Amplitudes usually do not exceed 0.1 mag. ... RR Variables of the RR Lyrae type, which are radially-pulsating giant A-F stars having amplitudes from 0.2 to 2 mag in V. Cases of variable light-curve shapes as well as variable periods are known. ... RV Variables of the RV Tauri type. ...

Twilight observations with MASS/DIMM B. Safonov Sternberg Astronomical Institute Moscow State University Comprehensive Characterization of Astronomical Sites, 2010 B. Safonov (Moscow State University) Twilight observations with MASS/DIMM SITE 2010 1 / 17 Why observe in twilight with MASS/DIMM? ... ASM includes 3 devices sensitive to background: guider, DIMM and MASS. B. Safonov (Moscow State University) Twilight observations with MASS/DIMM SITE 2010 2 / 17 Background in guider. ...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... The ionogram catalogue is divided into the data file and the key file. ... The station codes database consists of the data file and two key files. ... This database consists of the data file and the key file. ... The antenna DB consists of two interrelated databases. ... The data file contains the following information: antenna type, antenna name, antenna parameters names, measurement units, and ranges of parameters. ...

THE KAIDUN METEORITE: WHERE DID IT COME FROM? ... The formation of the subalkaline and alkaline clasts of the Kaidun meteorite, apparently also requires deep differentiation of material in a fairly large parent body. ... These differences in structure of two genetically linked clasts, due to the different encounter speeds of the clasts with the parent body of Kaidun, obviously indicate that these two events were separated in time. ... References: [1] Ivanov A.V. et al. ... 16] Ivanov A.V. et al. ...

STARTEST IMAGES GALLERY . STARTESTING TELESCOPES WITH AN AUTOCOLLIMATOR . ... This website is a joint effort of Markus Ludes from APM-Telescopes and Cor Berrevoets ( Aberrator free startesting Software ). The site aims at explaining the different aspects of star-testing telescopes. ... Markus Ludes (APM telescopes) used a high quality 10" Maksutov Newtonian (Zygo tested at 632,8 nm with the following errors: 1/10.1 wavefront p.t.v. and 1/51 wavefront RMS) as collimator in single pass scheme. ...

... NASA Integrated Services Network (NISN) . ... Russian Space Science Internet (RSSI) . ... In the Fall of 1993, NASA Science lnternet (NSI) and the Russian Space Science lnternet (RSSI) began a cooperative effort to provide lnternet communications to selected Russian institutions in order to promote sponsored scientific cooperation between the two countries. ... This change, limiting full lnternet access via NISN for NASA selected Russian institutions, will take place no later than July 1998. ...

MICROSCOPES . ... In the last three to five years, LOMO has developed new lines of products, including new families of biological, fluorescent, and polarizing microscopes, night vision devices, consumer Maksutov telescopes, etc. ... 1939 Company introduces its first student and biological microscopes. as well as its first manual movie camera . ... 1956 LOMO produces its first wide-screen-format movie projector and introduces its first fluorescent microscope for chemical structure analysis. ...

... April 1992 The MD5 Message-Digest Algorithm Status of this Memo This memo provides information for the Internet community. ... combination): -sstring - digests string -t - runs time trial -x - runs test script filename - digests file (none) - digests standard input */ int main (argc, argv) int argc; Rivest [Page 17] RFC 1321 MD5 Message-Digest Algorithm April 1992 char *argv[]; { int i; if (argc 1) for (i = 1; i argc; i++) if (argv[i][0] == '-' argv[i][1] == 's') MDString (argv ...