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- The Sun
-
- Use this option to find, for the date and time you enter,
- the sun's position (right ascension and declination),
- altitude and azimuth, nutation in longitude and obliquity,
- times of sunrise and sunset, and times of beginning and
- ending of morning and evening astronomical twilight (the
- time when the upper limb of the sun is 18 degrees below the
- true horizon).
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- Example entry format:
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- Month Day Year Hrs Min Sec
- 1 1 1986 12 0 0
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- The Moon
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- Use this option to find, for the date and time you enter,
- the moon's position (right ascension and declination),
- altitude and azimuth, horizontal parallax (the angle
- subtended by the earth as seen from the moon), distance
- from the earth, semi-diameter, illuminated fraction, and
- times of moonrise and moonset.
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- Example entry format:
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- Month Day Year Hrs Min Sec
- 1 1 1986 12 0 0
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- The Planets
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- Use this option to find, for the date, time, and planet
- you enter, the position (right ascension and declination),
- altitude and azimuth, distance from the earth, elongation,
- semi-diameter, illuminated fraction, and times of rising
- and setting (in chronological order). At this time, if you
- enter "Pluto," ACE displays an error message.
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- Example entry format:
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- Month Day Year Hrs Min Sec Planet
- 1 1 1986 0 0 0 Mars
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- Eclipses
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- Use this option to list, for the month or year you enter, the
- circumstances of solar and lunar eclipses visible from any
- location. After you enter a month and year, you may list
- eclipses for that month/year combination by entering "M" or
- for that entire year by entering "Y." For each eclipse ACE
- lists the UT date and time of the eclipse, the type of
- eclipse, and the magnitude. For total lunar eclipses ACE
- gives a more complete list of timings comprising beginning of
- partial phase, beginning of total phase, maximum eclipse, end
- of total phase, and end of partial phase.
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- Example entry format:
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- Month Year List[(M)onth, (Y)ear]
- 1 1986 Y
- Astrophotography Exposures
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- Use this option to calculate, for the information you enter,
- exposure times and image sizes needed in lunar and planetary
- photography.
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- Example entry format:
-
- Object Name: Mars
- Objective Diameter: 200
- Focal Length (same units as diameter): 2000
- Film Speed (ISO): 100
- Object Diameter (" of arc): 30
- Magnitude: -2.5
- Phase (0-1): 0.95
- Filter Factor (1 = no filter): 1
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- Mean Sidereal Time and Julian Day
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- Use this option to find, for the date, time, right ascension,
- and declination you enter, the Universal Time, Julian Day
- Number, Greenwich Mean Sidereal Time, local Mean Sidereal
- Time, hour angle, altitude, azimuth, airmass (thσ rati∩áoµ
- áatmospheriπ interferencσá lookinτá towarΣá thσá objec⌠ a≤á
- compareΣá t∩á tha⌠ lookinτátowarΣ thσ zenith¼áoε ß scalσ oµ ▒á
- t∩á infinity¼á witΦ "***ó indicatinτ aε objec⌠ belo≈ thσ
- horizon)¼á rise¼ anΣ set« ┴ messagσáwil∞ bσ displayeΣ iµ thσ
- objec⌠ i≤ circumpola≥ froφ you≥ observinτ site.
- site.
-
- Example entry format:
- Right Ascension Declination
- Month Day Year Hrs Min Sec Hrs Min Sec Deg Min Sec
- 1 1 1986 20 0 0 0 40 0 41 40 0
- Precession of Coordinates
-
- Use this option to precess forward or backward, for the
- epochs you enter, the coordinates of an object.
-
- Example entry format:
-
- From What Epoch? 1950
- To What Epoch? 2000
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- Right Ascension Declination
- Hrs Min Sec Deg Min Sec
- 0 40 0 41 40 0
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- Phases of the Moon
-
- Use this option to find, for the month and year you enter,
- the dates and times of each phase of the moon.
-
- Example entry format:
-
- Month Year
- 1 1986
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- Equinoxes and Solstices
-
- Use this option to find, for the year you enter, the UT dates
- and times of the beginning of the four seasons.
-
- Example entry format:
-
- Year
- 1986
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- Galilean Satellites of Jupiter
-
- Use this option to plot graphically the relative positions of
- the four Galilean satellites of Jupiter. The display starts
- at the date and time entered. Each subsequent display,
- updated at a rate set by your computer's speed (about one
- display per second), shows to scale the satellites' positions
- relative to the x-axis for the update interval you enter.
- For example, an update interval of "60" displays the
- positions as they would appear each hour. Aε updatσ interva∞
- oµ "0ó display≤ thσ position≤ fo≥ onl∙ thσ date and time
- entered.
-
- Example entry format:
-
- Month Day Year Hrs Min Sec Update Interval (Minutes)
- 1 1 1986 21 0 0 60
- Perpetual Calendar
-
- Use this option to display, for the month and year in the
- Gregorian calendar you enter, the calendar for that month.
- You may optionally request a printout of the calendar on the
- printer you designated during the ACE installation process.
-
- Example entry format:
-
- Month Year Hardcopy[Y/N]
- 1 1986 N
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- Polaris
-
- Use this option to find, for the month, day, and year you
- enter, the times of the culminations and elongations of
- Polaris.
-
- Example entry format:
-
- Month Day Year
- 1 1 1986
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- DOS Shell
-
- Use this option to execute DOS commands without leaving ACE.
- To return to ACE, type "EXIT" at the DOS prompt.
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- Exit
-
- Use this option when you want to exit from the menu and
- return to the DOS prompt.
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