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Äîêóìåíò âçÿò èç êýøà ïîèñêîâîé ìàøèíû. Àäðåñ
îðèãèíàëüíîãî äîêóìåíòà
: http://www.ipa.nw.ru/PAGE/FUNDAMENTAL/LSBSS/winample_guide/user1ino.htm
Äàòà èçìåíåíèÿ: Unknown Äàòà èíäåêñèðîâàíèÿ: Sun Apr 10 03:34:25 2016 Êîäèðîâêà: Ïîèñêîâûå ñëîâà: ngc 4736 |
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). User should choose a drive and folder where he/ she wants to take the file. 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. Mark by slider one of two possible types of extension: “.oc” (O – C files; this one is actual in default of specification), or “.*” (all files). Mark necessary file in the displayed list of files with chosen extension. The name of the file will appear in File name dialog box. It is sufficient to click on Open button to open the file.
In case you want to open the file with new name, type it in the File name dialog box. Possible extension for files with new names is “.oc”. Click on Open button to open the file.
In the wake of file opening its content is displayed. It is supposed that data of each observation are written in one row. Format of the observations depends on coordinates, which you deal with.
In case of equatorial coordinates it is supposed that observations are presented in the conventional formats of optic astrometric observations of minor planets, how they are published by Minor Planet Center (“accurate positions” or “approximate positions”):
| Columns | Use |
| 1–13 | minor planet number or name or preliminary designations (within first 13 symbols) |
| 16–31 | date of observation (UT) |
| 33–43 | observed right ascension (in hours, minutes, and seconds of time (“accurate positions”) or in hours and minutes (“approximate positions”) |
| 45–55 | observed declination (in degrees, minutes, and seconds of arc (“accurate positions”) or in degrees and minutes (“approximate positions”)) |
| 66–71 | observed magnitude and, optionally, band (U, B, V, R, etc. in columns 70, 71; V is assumed in default of specification) |
| 78–80 | observatory code |
Content of other columns does not influence on the calculation of O – C.
In case of ecliptic or horizontal coordinates it is supposed that longitude or azimuth are written in the same columns 33–43 and latitude or altitude in the columns 45–55, correspondingly (longitude and azimuth are conventionally expressed in degrees, minutes, and seconds of arc). Representation in the forms of accurate positions and approximate positions is also possible.