Castalia . Asteroid 4769 . Asteroid 4769 Castalia is a near-Earth crossing asteroid that was discovered by Eleanor F. Helin (Caltech) on August 9, 1989. Scientists used radio astronomy and computer modeling to generate this image of Castalia. They obtained the data for the computer model in 1989 using the Arecibo radar/radio telescope in Puerto Rico when the asteroid passed within 5.6 million kilometers (3.5 million miles) of the Earth. ... Topographic Map of Castalia . ...

MORPHOLOGICAL CATALOGUE OF THE CRATERS OF THE MOON . ... Coordinates, diameters and morphological features of 14 923 craters of the Moon in diameters 10 km and more are available in the catalogue. ... A lunar morphological crater catalogue was compiled by the Sternberg State Astronomical Institute in collaboration with the Unified institute of Nuclear Research, Dubna. ... 4. the presence of central peaks, ridges and mountains on the floor . ... peak and many mountains . ... many peaks, 1 mountain . ...

... Chapman, R. and Brandt, J.: The Comet Book: A Guide for the Return of Halleys Comet (1984, Jones and Bartlett) ? ... Branley, F.: Comets (1984, T.Y. Crowell) ? good picture book for students in grades K-3. ... Schatz, D.: The Comet Cometh: An Activity Book for the Return of Comet Halley ? ... Glenn, W.: "Halley's Comet Makes a Comeback'' in The Science Teacher Jan. 1984, p. 38. ... To construct a model of an Alien Being that could exist on another planet or satellite in our solar system. ...

... Next: FITS Checksum Verification Up: Data Models and Previous: A Proposed Convention . ... The FITSIO Subroutine Library has been available for 3 years, and has matured into a stable, full-featured interface for reading and writing FITS format files. ... The FITSIO subroutine library for reading and writing FITS files is now three years old and is used by many projects as the standard programming interface for accessing FITS format data files. ...

Next: Simple MIDAS Session Up: Cook-Book Previous: Commands . The first thing to do is to login to the computer which you would like to use for your data reductions. The detailed procedure for getting permission to use the computer and getting allocated disk space for your data reductions can be found in Appendix . ... Now you are ready to start the MIDAS system: . ... The available commands can be listed out by typing HELP . ... Executing System Commands . Some Useful Commands . ...

... This information may be for older NA2 filters?? Filters There are 7 filter positions, containing the following filters from Custom Scientific . ... 0 - Bessell R . ... The only filter requiring a focus offset is the ND2 + R filter which will be measured on the sky. ... The red filter attached to the ND2 in position 6 is not the same as the Bessell R. Number 6 is an RG610 red glass filter ( Rolyn 65.1355 ) for the 610 nm cut-on. ... Focus . ... Guider Mechanical Controller (filter and focus) . ...