Reference

Rise/Set/Transit/Twilight Data

• Complete Sun and Moon Data for One Day
• Table of Sunrise/Sunset, Moonrise/Moonset, or Twilight Times for an Entire Year
• Rise/Set/Transit Times for Major Solar System Objects and Bright Stars
• Duration of Daylight/Darkness Table for One Year

Phases of the Moon

• Dates of Primary Phases of the Moon
• Fraction of the Moon Illuminated
• What the Moon Looks Like Today

Eclipses, Transits and  Occultation's

• Eclipses of the Sun and Moon
• Solar Eclipse Computer
  Computes circumstances for selected solar eclipses at any given location.
• Lunar Eclipse Computer
  Computes circumstances for selected lunar eclipses at any given location.
• Recent and Upcoming Transits of Mercury and Venus
• Transit Computer
  Computes circumstances for selected transits of Mercury and Venus at any given location.
• Occultations of Stars by Asteroids  (International Occultation Timing Association)

• Lunar and Asteroidal Occultation Predictions Upcoming occultations viewable from Indian Hill.

• Occult Watcher Lists predicted occultations from Steve Preston's site for any geographic postition.  Includes a Google map with the predicted occultation path.  Click here for Steve's worldwide occultation predictions.

Variable Stars

• Long Period Variables  PDF file prepared by the AAVSO with predicted dates of Maxima and Minima of Long Period Variables for 2007 and Jan/Feb 2008.
• Eclipsing Binary Ephemeris  PDF file prepared by G. Samolyk with predicted dates of Maxima and Minima of Eclipsing Binaries for 2008.

Positions of Selected Celestial Objects

• Altitude and Azimuth of the Sun or Moon During One Day
• Topocentric Configuration of Major Solar System Bodies
  Provides tables of low precision topocentric position data for the Sun, Moon, and major planets.
• Geocentric Positions of Major Solar System Objects and Bright Stars
  Provides high precision geocentric position data for the Sun, Moon, major planets and selected bright stars.
• Topocentric Positions of Major Solar System Objects and Bright Stars
  Provides high precision topocentric position data for the Sun, Moon, major planets and selected bright stars.

Synthetic Views of the Earth and Solar System Bodies

• Day and Night Across the Earth
  Creates synthetic views of the Earth's surface (in grayscale or color) for any date and time.
• Apparent Disk of Solar System Object
  Creates a synthetic image of the telescopic appearance of the Moon or other solar system object for specified date and time.

 

Dates

• Earth's Seasons - Equinoxes, Solstices, Perihelion,and Aphelion 2000-2020
• Spring Phenomena, 25 BCE to 38 CE
• Julian Date Conversion
• Local Sidereal Time Clock Calculates Local Sidereal Time for a given longitude.

Celestial Navigation

• Celestial Navigation Data
  Provides computed altitudes and azimuths and other data for an assumed position and time.
• Nautical Almanac Online  Calculates the Greenwich Hour Angle and Declination of a navigational star or solar system body.  The output is in a form similar to the traditional Nautical Almanac.
• Navigational Star Chart

Miscellaneous

• Astronomical Almanac Online
  Provides complementary data to the printed Astronomical Almanac.
• International Celestial Reference System (ICRS) - Important Links