... observatory code . ... projections of the geocentric radius-vector of observatory on the Earth equatorial plane and on the Earth rotation axis, dxy and dz, correspondingly; both quantities are expressed in parts of the equatorial radius of the Earth taken as 6378.137 km; they are known as parallax constants . ... The observatory code is a string that contains three symbols, the first one being digit or letter, the second and the third ones being digits. ... So, code B47 means number 1147. ...
... For each observed position the table contains designation of object as in file of observations, the time of observation, the number and name/ preliminary designation of minor planet supposedly identical with observed object, the values of O – C (observed position minus computed one) in right ascension and declination expressed in arcsec, the difference O – C between observed magnitude and computed one, the code of observatory in the Observatory list (see Observatories section). ...
. Results of identification can be saved and printed with the help of usual means. As this takes place, user's actions do not vary from those described in III.13. Saving and printing results . It is well to bear in mind that file with new name can be saved only with extension.idr ( Identification results ).
When entering Plates section user should open the file with information on moments of observations, plate centers, angular dimensions of sky regions covered by plates and numbers of observatories (the file can be created for the first time or can be prepared according to bellow described format in advance). ... It is supposed that the position of plate center and half-dimensions of plate are specified in right ascension and declination (the edge of rectangular plate is oriented to the equator). ...
As a result of preceding actions the File opening dialog box appears and user is suggested to open the file with observations (the file may be created for the first time). ... To see the list of files with desirable extension in chosen folder define the type of extension with the help of File type drop-down list at the bottom of the dialog box. ... The name of the file will appear in File name dialog box. ... In case you want to open the file with new name, type it in the File name dialog box. ...
. User must specify the main plane and equinox of coordinate system by marking corresponding radio buttons, first in the left column Main plane and then in the right one Equinox . Paid attention to the fact that previously made choice of coordinate type (spherical or rectangular) and that of the type of positions (astrometric or geometric or apparent) constrains the choice in present item (see III.1. Basic concepts ).
. This part of the package is intended for drawing picture of the apparent motion of minor or major planets in the sky with respect to fixed stars. The picture is traced using astrometric geocentric positions of planet referred to the equator and equinox J2000.0 without regard for perturbations. It is possible to trace the tracks of up to three objects simultaneously on one screen. User should specify object(s) and the initial and final moments of time interval.
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. ...
To order one of the possible additional functions use list box at the top left of the Select elements dialog box. ... On each element El in this column one can impose selection conditions of the types . ... El >= B AND El <= C. If B > C, then selection will contain all minor planets with element El complying with disjunction of conditions: . ... If conditions are imposed on several elements, then selection contains only those minor planets, which satisfy all requirements. ...
As in the last years, the Ephemerides of Minor Planets for 2015 are prepared by the IAA RAS only in the electronic form. ... Orbital elements of all numbered planets have been determined in IAA all over again on the ground of available observations in the catalog of the Minor Planet Center. ... More detailed information on orbital elements used in the present volume of EMP and their accuracy is given in section "Information on new orbital elements". ... a) information on new orbital elements; . ...
... In the left part of the screen the items of ephemeris menu are situated. To the right one can see corresponding settings. In case the newly introduced settings are incompatible with each other or with other ones (it can be the result of improper change of previously existed setting or, what is virtually the same, result of violating the order from top down in which settings must be introduced) the warning notice appears on screen and conflicting settings are marked by special symbol. ...
User has possibility to save picture of apparent motion or to print it using standard means. To save the picture select File item in menu bar and then Save As... in drop-down menu. ... Choose a drive and folder where you want to save the file. The list of files with extension ".emf" in chosen folder will appear. ... Press Save button to save the file. To print plot of apparent motion select File item in menu bar and then take advantage of options Print Preview , Print Setup , Print. ...
To fulfil calculation of O – C for the whole list of observations, select Calculate in drop-down menu. To make calculation for only part of the list first mark needed part by sliding bar (to do this press Shift key and use up and down arrows) and then select Calculate in drop-down menu. ... Calculation can be continued after interruption by selecting O – C item in menu bar and then by choosing Continue in drop-down menu. ...
. IV. O – C . IV.1. Basic concepts . IV.2. List of observations . IV.3. Information on coordinates . IV.4. String editor . IV.5. Calculation accuracy . IV.6. Running the program . IV.7. Results of calculation . IV.8. Separating O – C . IV.9. Saving and printing results