Alcyone Astronomical Software - ephemeris software, astronomical tables, solar eclipse calculator


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List of Functions

Software > Sky Guide

Astronomical events

  • Table-format display of the most important astronomical events within a definable time period


Orbit diagram

  • Scalable illustration of orbits and positions of planets, minor planets and more than 150 minor objects (asteroids, comets) in the solar system (orrery)


Moon view (orthogonal projection):

  • Scalable, orthogonal, geocentric or topocentric moon projection while properly taking the libration, moon phase, position angle and parallactic angle into account
  • Labeling of the major lunar features (maria, craters, mountains, lacus, sinus, paludes)
  • Selenographic coordinate grid


Rise and set diagram:

  • Diagram showing the visibility of the planets, the sun and the moon at a glance


Positions of the major satellites of Jupiter and Saturn:

  • Diagram showing the positions of the major satellites of Jupiter and Saturn relative to the planet
  • Io, Europa, Ganymede, CallistoMimas, Enceladus, Tethys, Dione, Rhea, Titan, Hyperion, Iapetus


Tabular data:

  • Rise, culmination and set times of the planets, sun and moon
  • Circumstances of planetary phenomena (oppositions, conjunctions, greatest elongation, stations)
  • Circumstances of lunar phenomena (new moon, full moon, passages of the nodes, apogee and perigee)
  • Equinoxes and solstices
  • Local circumstances of solar and lunar eclipses
  • Transits, eclipses, occultations and shadow transits of the major satellites of Jupiter and Saturn


Ephemerides calculator:

  • Definable time range and time step
  • Heliocentric, geocentric, and topocentric positions of the sun, planets and moon in ecliptical, equatorial, and horizontal coordinates with corrections for parallax and refraction
  • Orbital velocity of the planets
  • Physical ephemerides: apparent diameter, magnitude, phase
  • Geocentric and topocentric lunar libration


Morning and evening appearance of Venus and Mercury:

  • Illustration of the position of Venus or Mercury with respect to the rising/setting sun


Sky Guide (map screenshot)Constellation Scorpius (detail)Sky map (fixed stars chart settings)Setting the observational timeEvent calculatorSky Guide (map screenshot)Sky Guide (map screenshot, night mode)Mars' path during it's opposition in 2016Solar Eclipse 2015-03-20Lunar eclipse 2019-01-21Lunar projectionLunar projectionOrbit diagramDiagram showing the visibility of the planets, the sun and the moonPositions of the Saturnian satellites Object information (part 1)Object information (part 2)Tabular data: rising, culmination, settingGeocentric ephemerisList of astronomical eventsEquinoxes and solsticesTabular data: planetary phenomenaTabular data: lunar phenomenaSatellites of Jupiter - eventsTabular data: local circumstances of solar and lunar eclipses

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