Disk No: 1614 Disk Title: Skyclock PC-SIG Version: S1 Program Title: Skyclock Author Version: 1.00 Author Registration: $25.00 Special Requirements: None. A unique program, SKYCLOCK is a historical astronomical ephemeris and data conversion program. Unlike most other astronomical ephemeris programs, this program works with dates of both the Julian and Gregorian calendars and dates A.D. and B.C. SKYCLOCK can also calculate the positions of the visible astrological houses for a specific date. Thus SKYCLOCK can be used for both astronomical and astrological purposes. With SKYCLOCK you may also automatically convert dates between several calendars used at different times throughout history. On what day did Julius Caesar die according to the Roman calendar? With SKYCLOCK you can find out. As an astronomical ephemeris, SKYCLOCK allows you to calculate the positions of the sun, moon, planets, stars, comets, and astrological houses for any date back to several centuries B.C. You must first enter the date and time and the latitude and longitude of your desired observation point. You may optionally have the date and time automatically entered from DOS, and the time entered may be according to five different time standards. SKYCLOCK then lists all the time variable elements entered, and the position of the celestial body. For the planets, SKYCLOCK lists the heliocentric and geocentric longitude and latitude, its perihelion, the right ascension, the declination, the azimuth, the altitude, the phase angle, elongation from the sun, the distance to the sun, and the distance to the earth. Other specific information is included for the sun, moon, comets and stars. SKYCLOCK can also list summary information of the positions for the sun, moom, and all the planets for a specific date all at once. For calculating the positions of the visible astrological houses, you must also enter the longitude of Mid-Heaven, the geographical latitude, and the obliquity of the ecliptic. SKYCLOCK will then list the positions of the visible astrological houses according to nine different systems used throughout history. SKYCLOCK is not only an astronomical ephemeris, but also a calendar date conversion program. SKYCLOCK allows you to easily convert dates between nine different calendars used throughout history. These include the Julian, Gregorian, Egyptian, Alexandrian, Roman, Nabonassar, Islamic, French, and Zodiacal calendars. For converting dates between the calendars you may enter either the date or the Julian day number. SKYCLOCK will then list the Julian day number, the day of the week, the age of the moon, and the Roman indiction. You may also find the date of Easter Sunday and the date of lunar epact according to both Julian and Gregorian calendars. File Descriptions: USER INI Initialization file. SKY EXE Astronomical ephemeris program. STARCAT DAT Star catalog file. CLOCK EXE Calendar date conversion program. SKY2 ??? On-line help file. CLOCK1 ??? On-line help file. SKYCLOCK EXE Main program. READ ME Program introduction. PC-SIG 1030D East Duane Avenue Sunnyvale Ca. 94086 (408) 730-9291 (c) Copyright 1988 PC-SIG, Inc.