Advanced Astronomy Calculator

Calculate sunrise, sunset, moonrise, moonset times, and current moon phase for any location and date.

Latitude (-90 to 90):

Longitude (-180 to 180):

Date:

Timezone Offset (hours from UTC):

Calculate the current positions of planets in the solar system, including their right ascension, declination, and distance from Earth.

Date and Time (UTC):

Calculate the angular distance between two celestial objects using their coordinates.

Right Ascension (hours):

Declination (degrees):

Right Ascension (hours):

Declination (degrees):

Calculate the field of view for your telescope and eyepiece combination, including magnification and exit pupil.

Metric (mm) Imperial (inches)

Telescope Focal Length:

Telescope Aperture:

Eyepiece Focal Length:

Eyepiece Apparent FOV (degrees):

Calculate how long light takes to travel astronomical distances and what we see from the past.

Distance:

Unit:

Convert between calendar dates and Julian dates, essential for astronomical calculations and observations.

Date and Time (UTC):

Julian Date:

Calculate combined magnitude of multiple stars, magnitude differences, and limiting magnitudes.

Star Magnitudes (comma-separated):

Telescope Aperture (mm):

Calculate orbital periods using Kepler's Third Law for objects orbiting the Sun or other bodies.

Metric Imperial

Semi-Major Axis:

Unit:

Central Body Mass (Solar masses):