Ephemeris 2.0

Ephemeris is a modern celestial calendar and sky guide that helps you plan, observe, and understand what’s happening above the horizon. Whether you’re a casual stargazer, an astrophotographer, or an educator, it delivers precise positions and timing for the Sun, Moon, planets, and key astronomical events in a clear, approachable way.

Key features:

• Accurate ephemerides: Track real-time and future positions for the Sun, Moon, and planets, along with lunar phases and illumination.
• Interactive time controls: Scrub through time to preview past and upcoming skies, visibility windows, and conjunctions.
• Rise/set and twilight: See sunrise, sunset, moonrise, moonset, and civil/nautical/astronomical twilight, plus golden and blue hour for planning shoots.
• Event calendar: Explore notable events such as eclipses, oppositions, conjunctions, and major meteor showers.
• Sky visualization: View altitude and azimuth over time, with simple charts that reveal the best observing intervals at your location.
• Location-aware planning: Use your current position or set custom locations and time zones for travel or remote planning.
• Flexible formats: Switch between coordinate systems (e.g., RA/Dec and Alt/Az) and units to match your workflow.
• Notifications and reminders: Get timely prompts for can’t-miss events and ideal observing conditions.

Ephemeris is designed to make complex astronomy data readable and actionable, so you can spend less time calculating and more time looking up.

Ephemeris is developed by Digital Light & Color. The most popular version of this product among our users is 2.0. The names of program executable files are Ephemeris.exe, grphephe.exe.